Sedimentation

Open Access Article

1 - Operation and empirical models to estimate erosion and Tvlydrsvb (Case Study castle area between the city Provinces.)
منصوره قوام محمود دره رودی علی البوعلی

Including water resources and soil erosion processes that threaten the country. Erosion process is very complex and many factors are involved in it ‌Kh most important climatic factors, land slope, Pvshsh‌Gyahy, and how land is managed. Due to lack of information on the More

Including water resources and soil erosion processes that threaten the country. Erosion process is very complex and many factors are involved in it ‌Kh most important climatic factors, land slope, Pvshsh‌Gyahy, and how land is managed. Due to lack of information on the area of the experimental method, four methods MPSIAC‌, EPM, FAO, BLM selection and evaluation of these four models in the domain of Kohgiluyeh Boyer Ahmad (the area between the castle) was performed. Cleans four basic models of erosion and deposition model to quantify and the other two as a qualitative estimate erosion. Based on annual erosion rate MPSIAC 59/3 tons per hectare per year and areas for EPM 76/2 tons per hectare per year, respectively. In the method, FAO, BLM final scores for all domains related to the erosion of 9/55 and 9/47, respectively, the average was calculated. Manuscript profile

Open Access Article

2 - The Evaluation of soil erosion and sediment yield in Namdan basin using MPSIAC and GIS Model
محمد ابراهیم عفیفی

The Flat and low slope morphology of Namdan and its margin springs have made Shadkam River less accessible in the middle parts. Thus the agricultural development in this area is difficult. Namdan has a deep alluvial sedimentary basin and the thickness of sediments is pr More

The Flat and low slope morphology of Namdan and its margin springs have made Shadkam River less accessible in the middle parts. Thus the agricultural development in this area is difficult. Namdan has a deep alluvial sedimentary basin and the thickness of sediments is predicted about 100 meters. Soil is an important natural resources and its erosion causes the serious vulnerability in social and economic development as well as environmental hazards. In this article, the quality of sedimentation in Namdan basin has been evaluated using GIS and MPSIAC model. The first goal of this study is the Zonation of sedimentation in terms of sediment production in studied area and the second is to calculate the quality of sedimentation (QS), total sediment production and their classifieds in the basin. The results of basin zonation are classified in high, medium, and low erosion class. Also, the zonation with high sedimentation from North West to South East of the basin in Shadkam River, where type of lithology and land cover are rivers and waterways, alluvial deposits, silty clay, sand and rubber, is seen Manuscript profile

Open Access Article

3 - Laboratory Valuation of Longitudinal and Transverse Profiles of Scour in a 180-Degree Channel: Application of Permeable Triangular Vanes
Mohammad Reza Kalamizadeh Amir Abbas Kamanbedast Ali Reza Masjedi Mahmoud Shafai Bejestan Hooshang Hasoonizadeh

10.30495/wsrcj.2022.20325

Background and Objectives: One of the new methods for controlling erosion on the outer bank of river curve is the use of plates connected to the riverbank. Coastal vanes are the environmental structures which are used to control bank erosion, divert flow from bank to ri More

Background and Objectives: One of the new methods for controlling erosion on the outer bank of river curve is the use of plates connected to the riverbank. Coastal vanes are the environmental structures which are used to control bank erosion, divert flow from bank to river center, improve sediment transport status, develop river for sailing, restorate and develop river's aquatic habitat. Despite the many advantages of coastal vanes, there is no detailed information about erosion and sedimentation and flow patterns around them under different hydraulic and geometric conditions and fewer research have been done. In the present study, the effect of different installation scenarios of triangular permeable vanes on bed sediment longitudinal and transverse profile changes in a laboratory channel with a 180-degree bend is evaluated.Methods: In this research, the main purpose is to investigate sedimentation and erosion patterns in the rivers’ bend using coastal triangular vanes; in this regard, the impact of distance between triangular vanes, their effective length, and Froud number on the erosion control of the outer bank of the 180 degree bend is focused. Experiments in a laboratory flume with a mild 180-degree bend with a  ratio and a rectangular cross section with a width of 0.6 meters is done. The angle of fixed triangular vanes is 60 degrees, the height of the permeable triangular vanes from the sediment surface is 10cm and the permeability of the triangular vanes is 12%. The experiments were carried out with limpid water mode. The effective lengths of the prepared vanes were 12, 15 and 20 cm with installation intervals of 60, 75 and 100 cm respectively and were run at two different inlet discharges.Results: Investigating the effect of the distance between permeable triangular vanes on bed topography shows that in each Froud number, with increasing the distance of vanes from each other, the maximum scour depth will be increased. The results demonstrate the use of permeable triangular vanes causes the flow deviation from the outer bank to the center and then the inner bank of the flume, which leads to control the erosion in the river outer bank. By increasing the inlet flow discharge and increasing the effective length of triangular vanes and the distance of triangular vanes from each other in a 180-degree bend, the maximum scour depth and volume are increased. The installation of triangular vanes with an effective length of  and a distance of 5L causes the flow deviation from the outer bank to the vanes cape and the middle of the flume, consequently results in a decrease in the shear stress in the middle of the flume and scour depth of the erosion channel and creates thalweg in the vanes cape.Conclusion: The results illustrate that by installing the triangular vanes, the point-bars are created in the interval between them. Therefore, during the effective length of 12cm, the maximum height of the point-bar on the outer bank equals to 30 and 31% of water depth, between the 0 to 170 degrees and 68.7 to 115 degrees equal to 11 times and 3 times the distance between the vanes, for discharge values of 13.5 and 15.5 l/sec, respectively. Also, for the mentioned conditions the width of the point-bar on the outer bank reaches  85% and 75% of vanes’ effective length , respectively. Permeable triangular vanes with six pillars are recommended for meandering rivers like  Karun in 90 and 180-degree arcs. These rivers have high torsion and curvature as well as high flow depth and low flow velocity in them, which contain high suspended sediments and the slope of this type of rivers is 0.001 or less and due to the low slope, their sediment carrying potential. Sediment loads are mostly fine. Manuscript profile

Open Access Article

4 - The Effect of Thickness and Number of Permeable Obstacles on Density Current Control and Trapping
Alireza Jahangir Kazem Esmaili Mahmoud Faghfour Maghrebi

Understanding and studying the river flooding, which in most cases is density current, can help to reduce adverse effects of sedimentation. To this end, the creation of obstacles in the bed of stream will be effective. In this paper, the effect of thickness (dimension) More

Understanding and studying the river flooding, which in most cases is density current, can help to reduce adverse effects of sedimentation. To this end, the creation of obstacles in the bed of stream will be effective. In this paper, the effect of thickness (dimension) and the second layer of permeable obstacles on the control and trapping of density current is investigated experimentally. For this purpose, two types of groove and cavity obstacles with grooves and cavity diameters equal to 3 mm and made of plaque glass were used. Density currents were created by adding an insoluble, suspended polymer of expanded polystyrene with a mean diameter of 1.15 mm and a density of 1.155 g / l. The experiments utilized two different concentrations (10 and 20%), five different porosities, four different angles, four different thicknesses and two barrier layers. The results showed that the density current process with 10% porosity of the groove obstacle increased with increasing thickness. The second layer of obstacles have increased the material passage through both groove and cavity obstacles. This increase was recorded in the groove type of 1.96 and the cavity type of 2.34. Investigations showed that the optimal distance of the second obstacle from the first was 2.25 meters. According to the results, under similar conditions, cavity obstacles always perform better than groove ones. Manuscript profile

Open Access Article

5 - Evaluating the Effects of Run off on Khadijeh Khatoun Basin Using MPSIAC Model
Hamidreza Pazouki Mahdi Sarai Tabrizi Hossein Babazadeh

10.30495/jest.2019.42260.4819

Background and Objective: Unfortunately, in recent decade, due to land use change and vegetation cover degradation, most of the rainfall changed into run off and causes abundant loss of life and property by creating enormous floods. The purpose of this evaluation was to More

Background and Objective: Unfortunately, in recent decade, due to land use change and vegetation cover degradation, most of the rainfall changed into run off and causes abundant loss of life and property by creating enormous floods. The purpose of this evaluation was to study the run off impacts on the erosion of the catchment area using the MPSIAC model.Method: For this purpose, the basic information and maps of the Khadijeh Khatoon basin in 2018 such as topographic and geology maps were collected. Then the calculation steps of nine model factors including surface geology or metrology, soil, climate, run off, topography, land cover, land use, current erosion and river erosion, and erosion and Sediment is estimated. Finally, the relationship between runoff and erosion of the basin was determined and the model of erosion and sediment estimation from runoff was determined.Findings: The results of this study showed that the amount of soil erosion is equal to 5806.97 tons per year and is 3.58 tons per hectare per year. If the value of one ton of agricultural land is equal to 50 US dollars and if the condition of erosion is available, the value of 5806.97 tons per year is equal to 290348.5 US dollars, which is equal to 11613.9 million Rials. The MPSIAC's seventh and eighth factor basins are the most effective factors.Discussion and Conclusion: This conclusion suggests that pastures around Khadijeh Khatoun are not well-conditioned due to over-capacity utilization, and the whole of the region's pastures due to climatic conditions. Also, the results showed that the runoff factor had a linear correlation of 0.98 with erosion, which indicates that the higher the runoff, the increase in the amount of erosion and deposition.  Manuscript profile

Open Access Article

6 - Optimization of rectangular secondary sedimentation tanks inlet (Case study: Tehran Wastewater Treatment Plant)
Akbar Akbarpour Alireza Mardookhpour

10.30495/jest.2021.59792.5337

Background and Objective: One of the most important parts of treatment plants is the sedimentation tanks in them, which play an important role in wastewater treatment. Due to this issue, a correct understanding of the behavior of sediment reservoirs is essential for the More

Background and Objective: One of the most important parts of treatment plants is the sedimentation tanks in them, which play an important role in wastewater treatment. Due to this issue, a correct understanding of the behavior of sediment reservoirs is essential for the design and operation of reservoirs. Therefore, it is not far-fetched that engineers are thinking of designing new tanks as best as possible and improving their efficiency. In order to achieve these goals, various methods have been proposed, among which improving the efficiency of reservoirs by changing the geometry in the reservoir is not only important but also an economic method and attracts the opinion of engineers from different aspects. Has attracted.Material and Methodology: The studied model has been removed from the existing wastewater treatment plant in Tehran. In the basic paper, different inputs of flow to the sedimentation pond are analyzed and by comparing the efficiency of different inputs, a specific input is presented as a suggestion. In the present study, the same inlet and reservoir will be used and by adding the sediment parameter as a new parameter, the hydraulic and flow and sedimentation characteristics in the said reservoir will be determined. It is 13 meters wide and 4/4 high. In order to observe the distribution of suspended solids during the settling process, the water in the reservoir at the beginning of the process is free of sediment (clear) and then with the entry of wastewater containing suspended solids, the method of releasing suspended solids and then settling of solids can be Observed in full.Findings: In the model at the entry points, distances of 10, 20 and ... to 60 (output overflow) by creating virtual sensors, flow parameters were used to produce and analyze comparative graphs. The findings indicate that time The analysis is in accordance with the residence time of the regulation is 6500 seconds, which in the range of about 800 to 1000 seconds of analysis (16 minutes) the flow and movement conditions of sediments are balanced and is constant until the end of the residence timeDiscussion and Conclusion: The results show that the contour particles of sediment particles in the reservoir are at times 50, 300, 500 and 1000, respectively. After 1000 seconds to 6500 seconds, the situation is completely stabilized and there is no change in the contours compared to 1000 seconds. On the other hand, the amount of suspended solids in wastewater decreases by moving downstream and reaches zero within 10 meters of the end, which indicates the complete removal of suspended solids in the sedimentation process. The results also show that the most turbulent energy is at the outlet at a distance of 10 meters from the inlet, which is due to the eddy current and rotation in this area. By moving downstream, the turbulence current decreases and at a point 10 meters from the outlet is close to zero, which indicates the correct operation of the tank. Manuscript profile

Open Access Article

7 - Comparison of Models TOPSIS, SAW, ELECTRE and VIKOR in order to the prioritization of sedimentation and flood hazard of watersheds
Mehdi Teimouri Ehsan Alvandi

10.30495/jest.2022.45404.4731

Background and Objective: To determine and zonation of flood prone hazardous area and prioritization the sub-basins in terms of flood potential can have great contributions in promising watershed management. The present research aims to prioritize flood and sedimentatio More

Background and Objective: To determine and zonation of flood prone hazardous area and prioritization the sub-basins in terms of flood potential can have great contributions in promising watershed management. The present research aims to prioritize flood and sedimentation potential in the sub-basins of the Bonekooh watershed using TOPSIS, SAW, ELECTRE and VIKOR methods. Material and Methodology: In this present study, we used area estimation indices, drainage density, gravel coefficient, basin average height, basin average slope, curve number, sediment yield, cover percentage, sediment delivery ratio, runoff height and concentration time as an important indicators affecting water permeability, runoff production and, consequently, the potential for flooding and sedimentation. Then, using the Analytic Hierarchy Process (AHP) method, the weight of each index is met. Following the formation of decision matrix with 18 options (sub-basins) and 11 criteria (evaluation index), Technique for order Preference by Similarity to ideal Solution (TOPSIS), Simple Additive Weighting (SAW), Elimination Et Choice Translation Reality (ELECTRE) and Vise Kriterijumska Optimizacija Kompromisno Resenje (VIKOR) techniques were used to prioritize sub-basins. Borda and Copland methods were used to combine the rank of proposed techniques. The residual sum of squares (RSS) method was used to determine the closest method to the final result. Also, in order to validate the models, we estimated the percentage change and the intensity of the changes. Findings: The results showed that the highest runoff height index (0.18) and the gravel coefficient had the lowest weight (0.028), according to experts. Prioritization results showed that in SAW, TOPSIS and VIKOR methods, sub-zones 9, 4, and 2 ranked first to third priorities respectively and are in a more critical situation, but in the ELECTRE approach sub-basins 9, 4, 2 and 7, respectively, have the first to third priorities. Considering the results of the combined ranking of the proposed techniques, sub-basins 9, 4 and 2 are in first to third priority, respectively, and have a more critical situation than the rest of the sub-basins. Also, zones with flood and sedimentation potential in the area showed that 32% of the area in high and very high risk. The results of the sum squared error showed that the VIKOR method had the least error and the ELECTRE method had the most error than the final ranking. Also, the TOPSIS and VIKOR methods with the lowest percentage of change (59.72%) were ranked first and the ELECTRE method with the highest percentage change (65.27%) is the last rank. The lowest intensity was also observed in the VIKOR method (4.59) and the highest intensity variation was observed in ELECTRE method (5.61). Discussion and Conclusion: Therefore, it can be said that multi-criteria decision-making techniques are a practical and appropriate approach for better decision-making based on mathematical sciences and optimization. Therefore, these types of low-cost and fast-track research can be prioritized to protect watersheds. Manuscript profile

Open Access Article

8 - Investigation of the accuracy of multilayer perceptron network and radial base function in estimating river sediment (Case study: Zayandehrud)
Ramtin Sobhkhiz Alireza Mardookhpour

10.22034/jest.2021.56444.5208

Background and Objective: Estimating the amount of sediment by the river is one of the topics that has been considered by many researchers since the past. Reduction of the dam reservoir capacity because of sediments has different effects on different sections and causes More

Background and Objective: Estimating the amount of sediment by the river is one of the topics that has been considered by many researchers since the past. Reduction of the dam reservoir capacity because of sediments has different effects on different sections and causes adverse effects on the water rights that were initially agreed upon, which will impose several economic and specific consequences. This study aims to model and estimate the amount of suspended sediment using existing experimental equations and new methods called black box. Material and Methodology: The discharge (volumetric flow rate) related to Zayandehrud River in Eskandari station, one of the hydrological measuring stations, has been used to estimate the amount of sediment. For this purpose, water discharge and sediment rate are used as input and output, respectively. Findings: According to the obtained results, it is concluded that the RBF network has better performance due to less error in the test stage, but the MLP network seems to have a better performance considering other parameters and the error in the TRAIN stage. Discussion and Conclusion: Finally, after modeling by using neural networks, the Einstein relationship, and the sediment measurement curve, it is inferred that neural networks are more accurate to estimate the amount of sediment. Manuscript profile

Open Access Article

9 - Effect of Current Induced by Density Cahnges on Performance of Sedimentation Tanks and Proposing Solutions to Eliminate its Negative Impacts
Seyed Mostafa Khezri Faranak Mirfattah

Abstract Background and Objective: The objective of this study is to evaluate the disadvantages of density in sedimentation tanks and suggest sollutions to eliminate those disadvantages. Method: In this study, a 1:20–scale rectangular sedimentation tank, with thic More

Abstract Background and Objective: The objective of this study is to evaluate the disadvantages of density in sedimentation tanks and suggest sollutions to eliminate those disadvantages. Method: In this study, a 1:20–scale rectangular sedimentation tank, with thickness of 10 mm, was used as a pilot. The pilot was made up of plexiglass according to the Frod model. Three draw_offs in the bottom of the tank, two withdraw baffles, one intermediate baffle, one inlet baffle and effluent weir configurations were used in the experiments. Turbulence was formed by density of current and then lighter suspended solids went toward effluent weir. Results: The turbulence cused by currents lead to increase of suspended solids at effluent and decrease of the sedimentation tank efficiency. The proposed sollution for prohibition of those disadvantages is the use of baffles in different positions. Conclusion: The results indicated increases of 20% for using intermediate baffle and 23% for using withdrawal baffles within 2.2-6.8 °C temperature difference between entering current and sedimentation tank contests with suspended solid concentrations of 100- 300 mg/lit.  Manuscript profile

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10 - بررسی شرایط غیر رسوب‌گذار در سیفون معکوس کرخه با استفاده از مدل فیزیکی
حسین خزیمه نژاد محمود شفاعی بجستان

   نهشته شدن رسوب در سازه‌های انتقال آب، از قبیل سیفونهای معکوس، باعث کاهش سطح مقطع جریان و نیز افزایش زبری میشود که درنتیجه، کاهش آبدهی سازه را به دنبال خواهد داشت. از جمله روشهای جلوگیری از نهشتهشدن رسوب و یا خروج آنها، ایجاد شرایط غ More

   نهشته شدن رسوب در سازه‌های انتقال آب، از قبیل سیفونهای معکوس، باعث کاهش سطح مقطع جریان و نیز افزایش زبری میشود که درنتیجه، کاهش آبدهی سازه را به دنبال خواهد داشت. از جمله روشهای جلوگیری از نهشتهشدن رسوب و یا خروج آنها، ایجاد شرایط غیر رسوبگذار، در سازه میباشد. با توجه به اینکه بحرانیترین قسمت سیفون معکوس، از لحاظ نهشتهشدن رسوب، مجرای خروجی است، در تحقیق حاضر، ابتدا با استفاده از آنالیز ابعادی، یک رابطهی کلی، برای آستانه حرکت ایجاد شد که مرز شرایط غیررسوبگذار، در مجرای خروجی سیفون معکوس کرخه میباشد. سپس، با استفاده از یک مدل فیزیکی، از مجرای خروجی سیفون معکوس کرخه و نیز 5 نمونه رسوب غیر چسبنده با ابعاد  5/0، 7/0، 1، 2 و2/3 میلیمتر، آزمایشهای لازم انجام گرفت و در نتیجه یک گراف کاربردی، جهت بررسی شرایط غیر رسوبگذار، در مجرای خروجی سیفون معکوس کرخه، استخراج گردید. با استفاده از این گراف و نیز منحنی توزیع دانهبندی مواد معلق رودخانه کرخه، در محل سد انحرافی حمیدیه، حداقل سرعت غیر رسوبگذار یا همان حداقل سرعت عدم تهنشینی ذرهای، به قطر 5/1 میلیمتر که بزرگترین ذره رسوب ورودی به کانال بالادست سیفون معکوس کرخه از محل سد انحرافی حمیدیه میباشد، تعیین گردید. نتایج تحقیق، حاکی از حاکم بودن شرایط غیر رسوبگذار در سیفونمعکوس کرخه در دبی و سرعت طراحی میباشد. Manuscript profile

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11 - ارزیابی ذرات و بررسی رسوب ورودی به مخزن سد گتوند علیا با استفاده از نرم‌افزار CCHE2D
محمد رضا فرشادی سعید حاجی علی گل جواد احدیان محمد جواد نصر اصفهانی

پدیده رسوبگذاری در مخازن سدها پدیدهای پیچیده بوده و عدم اطلاعات از میزان رسوب ورودی به مخزن سد و پیشبینی روشهای کنترل آن، موجب کاهش عمر مفید سد و اتلاف سرمایههای عظیم ملی میگردد. به منظور محاسبه بار رسوب ورودی به مخزن سد گتوند علیا از مدل ر More

پدیده رسوبگذاری در مخازن سدها پدیدهای پیچیده بوده و عدم اطلاعات از میزان رسوب ورودی به مخزن سد و پیشبینی روشهای کنترل آن، موجب کاهش عمر مفید سد و اتلاف سرمایههای عظیم ملی میگردد. به منظور محاسبه بار رسوب ورودی به مخزن سد گتوند علیا از مدل رایانه ای  CCHE2Dکه توانایی انجام محاسبات رسوب را دارد استفاده شده است. برای آمادهسازی مدل، از حجم زیادی اطلاعات شامل مشخصات مقاطع رودخانه در بالادست محل احداث سد، آمار مربوط به دبی روزانه رودخانه، سیلابهای با دوره بازگشتهای مختلف، دانهبندی مواد بستر و دیگر اطلاعات مورد لزوم استفاده گردیده است. پس از کالیبره کردن و اجرای نرم افزار، بار رسوب ورودی به مخزن سد گتوند علیا برابر با 89435 کیلوگرم بر متر مکعب محاسبه شد و با توجه به نوع حالت بهرهبرداری از مخزن و وزن مخصوص انباشتهها و ضریب تلهاندازی 90 درصد، حجم کل رسوب انباشته شده در مخزن این سد برابر با 241 میلیون مترمکعب خواهد بود که 23/7 درصد حجم کل مخزن سد را پس از 100 سال تشکیل میدهد. همچنین قسمت اعظم بار رسوبی ورودی به مخزن سد گتوند علیا ذرات سیلت درشت با اندازه 6250/0 - 310/0 میلیمتر و ماسه بسیار ریز با محدوده اندازه 125/0 - 0625/0 میلیمتر را تشکیل میدهد. Manuscript profile

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12 - پایش کیفی پارامترهای فیزیکی، شیمیایی و میکروبی در طول کانال انتقال آب تصفیه خانه جنوب شرق
سید محمد مهدی آیتی مهدی اسدی لور

 رودخانه‌ها بدلیل ورود بخشی از آلاینده‌های ناشی از فعالیت جوامع انسانی در مقایسه با سایر منابع آب (زیرزمینی) به مقدار بیشتری در معرض ورود آلایندهای ثانویه به منابع آبی محسوب می‌شوند. بررسی کیفیت کانال انتقال آب تصفیه خانه جنوب شرق به دلیل تامین آب شرب شهرستان‌های م More

 رودخانه‌ها بدلیل ورود بخشی از آلاینده‌های ناشی از فعالیت جوامع انسانی در مقایسه با سایر منابع آب (زیرزمینی) به مقدار بیشتری در معرض ورود آلایندهای ثانویه به منابع آبی محسوب می‌شوند. بررسی کیفیت کانال انتقال آب تصفیه خانه جنوب شرق به دلیل تامین آب شرب شهرستان‌های ماهشهر، بندر امام و صنایع پتروشیمی اداره کل بنادر و کشتیرانی و سایر مشترکین اداری و تجاری بندر امام از اهمیت ویژه‌ای برخودار است. در این مطالعه به بررسی پارامترهای کیفیت فیزیکوشیمیایی و میکروبی شامل دما(T)، هدایت الکتریکی(EC)، کل جامدات محلول(TDS)، کدورت(TUR)، خاصیت اسیدی یا بازی(pH)، سختی آب(TH)، کلسیم(Ca)، منیزیم(Mg)، کلرور(Cl، کربنات(C03)، بی کربنات(HCO3)، سدیم(Na)، پتاسیم(K)، اکسیژن مورد نیاز شیمیایی(COD)، سولفات (SO4) و کلیفرم  مدفوعی درطول کانال انتقال آب جنوب شرق از کوت امیر تا سربندر اقدام شد. براین اساس در بازه زمانی آبان 97 تا اردیبهشت 98 طی عملیات میدانی اقدام به برداشت نمونه کیفی درهر ماه دو نوبت و هر نوبت دو نمونه کیفی از 5 نقطه در طول کانال آب جنوب شرق و در مجموع به تعداد 60 نمونه کیفی برداشت شد. طبقه بندی آب از نظر کشاورزی، شرب و صنعت بر پایه تحلیل کیفی از طریق نمودارهای ویلکاکس، شولر، و پایپر انجام شد و در انتها  استفاده از شاخصNSFWQI اقدام به طبقه بندی کیفی آب شد. بررسی نتایج آزمایشات و نمودارهای صورت گرفته در خصوص کیفیت آب از نطرشرب در کلاس قابل قبول بود. همچنین با استفاده از شاخصNSFWQI کیفیت آب در طول مسیر کانال در حد متوسط می‌باشد. Manuscript profile

Open Access Article

13 - Estimation of specific sedimentation status of formations using water discharge and sediment of Mamlu hydrometric station in Damavand Drainage basin
Keyvan Ahzan

Estimation of suspended sediment load is one of the most important factors in the hydraulic, morphological and hydraulic behavior of river sediments  and the basis of proper management of water and soil resources in Drainage basin. Estimation of the total suspended More

Estimation of suspended sediment load is one of the most important factors in the hydraulic, morphological and hydraulic behavior of river sediments  and the basis of proper management of water and soil resources in Drainage basin. Estimation of the total suspended load of the river is often possible with the data measured in hydrometric stations from establishing the relationships of sediment measurement curves using conventional methods. In this paper, the amount of sediment estimation in Damavand Drainage basin has been estimated through statistics recorded in Mamlu hydrometric station. The main rivers of Damavand Drainage basin are Damavand and Siahroud rivers. Damavand river which flows from east to west of the basin and while passing through Damavand city, Tarroud, Arab chenarha, Gilavand, Hesare paeen, Mara, Kajan, Tamisan, Zareh Dar and Siah Sang, after 48 km, finally in Yurd Shah It joins Jajroud river. For this purpose, these statistics (related to Damavand Drainage basin) were received from Tamab Company. According to the study, the average annual bed load in Damavand Drainage basin is 46395.332 tons, the total discharge of sedimentary materials is 2783.2192 tons and the specific sediment production of the basin is on average 3665.12 tons per square kilometer. The results of this study show that Karaj Formation, due to its area in Damavand Drainage basin, has the largest share in sediment production. Manuscript profile

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14 - Valuation potential of water quality in occurrence of sedimentation and corrosion in drinking water facilities in Goybolagh village, Malard city
سمیه KHamisabadi Mohammad Manshori مجتبی Sayadi محمود Salari

The objective of this article is introducing the sedimentation and precipitate potential of fresh water in guybolagh region placed on the north west of Shahriar – Tehran. (Rainfall year 1390). This research is done by thedescriptive method, part time period and us More

The objective of this article is introducing the sedimentation and precipitate potential of fresh water in guybolagh region placed on the north west of Shahriar – Tehran. (Rainfall year 1390). This research is done by thedescriptive method, part time period and use of RAYZNER and saturation parameter and SHULER diagram.In this study these parameters: (alkalinity, calcium hardness, electrical connectivity, temperature and PH) wereanalyzed. The results of experiments and calculations suggest it hand and average saturation index versus 0/54,and the average index rayzner against 13/7 is. Based on a standard table ministry of health figures indicatedeposition and slightly corrosive drinking water wells in the village Guy Bolagh is based on results andaccomplishment ,the fresh water of this region is sedimental and a little corrosion that this factor is influenced byregions geology and continent features. So in the area of water quality parameters based on PH, alkalinity,hardness and … should be Occur. In this regard, use of corrosion resistant materials and pipes and consider usingincendiary devices deposition. Manuscript profile

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15 - Qualitative changes Trend (in terms of sedimentation and corrosion) in drinking water of three villages of Sarbandan, Jaban and Ayinehvarzan, in Damavand area
Farzaneh Ghodrati Mohammad Manshouri Mojtaba Syyadi Mahmoud Salari

An intensive decrease has been occurred in discharge of drinking waters in some of villages of Damavand citywhich caused dramatical changes in quality and quantity drinking water of these wells. This research tries tostudy probable qualitative changes in these resources More

An intensive decrease has been occurred in discharge of drinking waters in some of villages of Damavand citywhich caused dramatical changes in quality and quantity drinking water of these wells. This research tries tostudy probable qualitative changes in these resources, as well as evaluating role of qualitative condition of waterin reduction of its quantity. According to the conducted studies, reduction in quantity of wells of the villages canbe attributed to two reasons: 1. Tectonic factors and geology of the region; 2. Chemical factor. Geological andtectonic studies revealed that tectonic factors had no effect on reduced discharge and quality, because tectonicfunctions linearly, while this was a point event. Therefore, it is more likely that there is a relation betweenchanges in quality and chemical factors and conditions. Finally, based on physical and chemical analysis ofwater samples and calculation of Langelier’s index and Rayzanar’s index on one hand, and study of geologicalformations, especially sequences of sediments in north of the region, with most frequent facies being chilefollowed by carbonated, dolomite facies, on the other hand. it can be said that water of studied wells makesediments. Therefore, study of hydrochemical conditions of groundwater of the studied zone, persistentmonitoring of ground water, videometery of wells, persistent discharge measurement, and identification ofsediment of pipe wall are recommended. Also, application of proper methods such as waterjet, ultrasound, acidpickling, and magnetic air shock (separately, or in hybrid manner) results in dissolution of sediments formed onthe wall of well. Manuscript profile

Open Access Article

16 - The use of geographic information system and remote sensing in evaluating the effects of watershed management projects implemented in the Rimleh Watershed of Khorramabad City.
Ebrahim Karimi Sangchini SeyedAbdolhossein Arami Ebrahim Yousefi Mobarhan

Evaluating the implemented watershed projects and providing a perspective of their performance results provide managers and decision-makers with appropriate information for long-term planning. Nowadays, by using powerful remote sensing software and geographic informatio More

Evaluating the implemented watershed projects and providing a perspective of their performance results provide managers and decision-makers with appropriate information for long-term planning. Nowadays, by using powerful remote sensing software and geographic information system, the necessary calculations can be done with more accuracy and speed. The purpose of this research was to evaluate the effects of watershed management projects implemented in the Rimeleh Watershed using geographic information system and remote sensing in terms of erosion, sedimentation, and runoff. EPM model was used to predict erosion before and after the implementation of watershed projects. American Soil Conservation Society (SCS) curve number method was used to calculate the runoff before and after implementation of watershed management plans. The CN coefficient was calculated for two applications prepared in 1370 and the current one. The paired t-test was used to investigate the statistical difference between the difference in production runoff and the amount of erosion and sedimentation before and after the implementation of watershed projects. The amount of total annual erosion and sedimentation in current conditions have decreased by an average of 6793 cubic meters and 5712 tons, respectively, compared to before the implementation of watershed protection plans. The amount of difference in the volume of annual runoff between before the implementation of the plans and the current conditions is on average about 15256 cubic meters. The results of the paired t-test showed that the watershed protection measures implemented in the Rimeleh Watershed have been able to create a significant difference in reducing erosion, sedimentation and production runoff, and the general conclusion is that these measures have had a significant positive effect in reducing erosion, sedimentation, and production runoff. Manuscript profile

Open Access Article

17 - Factors Affecting the Efficiency of Hydraulic Flushing in Storm System for Sedimentation Control: A Review
Geok Teng Leong Charles Hin Joo Bong

10.22094/joie.2022.1951664.1936

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18 - Calculation of Sediment Entering a Karoon River Using GSTARS 3
Zahra Shojaeian Hamidreza KHodabakhshi

Sediments transported by water flow, an important factor in the formation of the geometrical structure and morphology of rivers considered. In this paper, the process of sedimentation Karun river was simulated using the Gstars3 software in the range of Ahvaz hydrometric More

Sediments transported by water flow, an important factor in the formation of the geometrical structure and morphology of rivers considered. In this paper, the process of sedimentation Karun river was simulated using the Gstars3 software in the range of Ahvaz hydrometric stations to Farsiat a length of about 50 km. The purpose of this study was to select a suitable mathematical model for estimating the sediment transport rate in a way that is able to simulate accurately in the river. Calibration of sedimentary depositional model shows that for the the range the relationship Ackers- White (1973) and (1990) fitted to existing conditions are Karun River. Also sedimentation volume of hydrometric stations in Ahvaz and Farsiat 18.25 and 16.65 million cubic meters per year respectively was estimated. This indicates that the area is strongly depositing. Manuscript profile

Open Access Article

19 - Study and estimation of the useful life of the dam under the influence of input sediments deposited with using Karun 92 software
roozbeh AGHA MAJIDI mohammad rafiee Rafiee

the sediment accumulation in the reservoirs places upstream and downstream of the dam under the influence of ecosystem changes. In order to increase the volume of regulated water in the river basin and prevent the introduction of river sediments into the dam reservoir a More

the sediment accumulation in the reservoirs places upstream and downstream of the dam under the influence of ecosystem changes. In order to increase the volume of regulated water in the river basin and prevent the introduction of river sediments into the dam reservoir and as a result of increasing the useful life of the dam and the optimal management of water resources in the given time, the required data from the relevant companies from the Tangab Dam was obtained and Using Karun's analysis software, based on the calculations performed by the software, the modified volume (after sedimentation) after one year and after 50 years from the beginning of operation, using the method of increasing the level to The order of 1021.646 million cubic meters and 605.664 million cubic meters, and also for the method of reducing the level of these numbers is equal to 1021.6 million million Rmkb and 064/580million cubic meters is estimated. Given the reservoir type and sediment volume, the curves of hp and h'p are plotted. According to the power plant's level, the reservoir level of the dam increases with the calculation of sediment distribution by increasing the level after 110 years from the plant's level of utilization, and this also occurs in the method of reducing the level after 100 years. Manuscript profile

Open Access Article

20 - Assessment of Erodibility and Desedimentation in Pileh Rood Watershed in "Ardabil" with Fuzzy Technique
Rasol Samadzadeh Sharareh Haddady

In the end of the eastern side of Azerbaijan volcanic plateau, in the altitudes of Sabalan and Baghrodagh, there is a relatively closed structural depression and pit called Ardabil plain that all surrounding altitudes are directed toward it. Different structure with va More

In the end of the eastern side of Azerbaijan volcanic plateau, in the altitudes of Sabalan and Baghrodagh, there is a relatively closed structural depression and pit called Ardabil plain that all surrounding altitudes are directed toward it. Different structure with various resistance rates, enjoying cold semidried climate, the lack of vegetation coverage, and the dominant negative trends on a extensive part of mountain plain of the areas have caused these areas especially the naturally formed watersheds in them to have a relatively high Erosibility power. The main purpose of present study is the evaluation of erosion and erosion Desedimentation in Pileh Rood watershed as one of sub _basins of folding altitudes of Namin located in northern side of Ardabil. In this study, in addition to aerial photography at the scale of 1: 55,000, topographic maps scale of 1: 50,000 and geology map 1:100000 filed erosion and sedimentation are measured by logic fuzzy method. Finally, this technique was compared with empirical method of P.S.I.A.C and the given erosion limits was evaluated and compared through observations and field work. Using fuzzy modeling with minimum input data by the two -variable model and comparing it with P.S.I.A.C model it was concluded that the fuzzy logic - soil erosion prediction models are efficient at locating and differentiating areas of soil erosion with minimum input data. Manuscript profile

Open Access Article

21 - The valuation of erosion at basin watershed in mousabad –tiran by using SLEMSA modle
Amir Gandomkar Nafiseh Shaikhei Samira Ahmadi

              One of the most important purposes in local studing and land use evaluation the hazards of erosion in various areas and determing its quantity. For evaluating erosion , there are many metods More

              One of the most important purposes in local studing and land use evaluation the hazards of erosion in various areas and determing its quantity. For evaluating erosion , there are many metods . In this methods, there are different factors such as rain erosion , value of erosion soil and plant coverage . According to important variables that have influence on above factor and total value of erosion distiribution and geographical dispersion and the way of interfering them in change rate of soil erosion also determined. Although there are different methods e for evaluating erosion hazards, SLEMSA model. Because of using curvature correlation, serving effective factors in erosion, determining  value interfering factors based on their significance with a ratio of weight and finally considering all of effects in this model have optimal potential power. In this study, for evaluating soil erosion at basin watershed of Mousa Abad in Tiran by using SLEMSA modle, the first we begin to collect, prepare and enter information  layers such as topography, climatological, plant coverage and outer level of the land, then with composing this layers, basin is separated to410 units of sedimentation      that 220  are upward and 210 are in downward. At the end, the value of erosion hazard is measured and giving value is as unit of erosive hazard in basin (EHU).                                Manuscript profile

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