List of Articles hydrology

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  1 - Curve Number (CN) Calculating and Zonation of Subbasins Case study: Ahar Chay Basin
  بهروز Sari
  One of the most important Physical factors in basin is the time of concentration. Bacause,there is the curve number (CN) factor in calculating the time of concentration,so that is nessecity for some researches in soil penetration, landuse and surface savecoefficient fil More

  One of the most important Physical factors in basin is the time of concentration. Bacause,there is the curve number (CN) factor in calculating the time of concentration,so that is nessecity for some researches in soil penetration, landuse and surface savecoefficient filds.In this paper, the mentioned items are calculated which contain sampling all of casesurface and determining the soil penetration. Next stage contains recognizing soilpenetration Zonns, landuse of basin and those maps.Presenting the hypothesizes and subbasins recognizations were the next stages thatlead to calculating CN amount in surface basin and CN polygon maps.Finally, amount of time of concentration of basin and subbasin (by hour) based onsoil conservation service(SCS) relation are calculated that are useful in hydrologicalcalculations. Manuscript profile
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  2 - Comparison of Hydrology and Eco Hydrology Methods in Environmental Flow Estimation of Mahabad River
  nazak rouzegari mohammad taghi sattari hajar feyzi
  10.22034/jest.2018.21469.3062
  Background and Objective: In water resources management and operation, especially for dam reservoirs, supplying the minimum water demand for protecting the life of the different plant and aquatic species is essential. Allocating the environmental flow for Mahabad River, More

  Background and Objective: In water resources management and operation, especially for dam reservoirs, supplying the minimum water demand for protecting the life of the different plant and aquatic species is essential. Allocating the environmental flow for Mahabad River, as one of the most important rivers in the Urmia Lake basin, is very crucial. Therefore, the purpose of this study was to estimate the minimum environmental flow for Mahabad River using Eco-Hydrology methods. Method: In this study, the environmental flow for Mahabad River was estimated by five methods, namely Tenant, Tessman, Flow Duration Curve (FDC) Shifting, Desktop Reserve Model (DRM), and Flow Duration Curve Analysis (FDCA). Findings: According to the results obtained in this study, to protect Mahabad River in the acceptable minimum environmental condition, the FDC shifting model considering class B (35.1% MAR (mean annual runoff), equivalent to 2.75 m³/s) and DRM considering class B/C (27.24% MAR, equal to 2.13 m³/s) led to approximately similar and acceptable results. Discussion and Conclusion: Generally, the FDC shifting model and DRM that consider different hydrological classes are preferable to other methods, and these methods can be used to determine the environmental flow for Mahabad River. Manuscript profile
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  3 - Performance of Revised Gash Model for Estimating Rainfall Interception in a Robinia pseudoacacia plantation during the leafed and leafless periods
  Sina Ziaye Shendershami Ameneh Mianabadi Seyed Mohammad Moein Sadeghi
  10.30495/jest.2022.60309.5368
  Background and Objectives: Therefore, this study aimed to evaluate the revised Gash model in estimating interception by a Robinia pseudoacacia (L.) stand during the leafed and leafless periods in Chitgar Forest Park. Material and Methodology: A circular plot with an ar More

  Background and Objectives: Therefore, this study aimed to evaluate the revised Gash model in estimating interception by a Robinia pseudoacacia (L.) stand during the leafed and leafless periods in Chitgar Forest Park. Material and Methodology: A circular plot with an area of 0.5 ha in Chitgar Forest Park was selected and rainfall, throughfall, and stemflow were measured for two years (from 22 December 2013 to 21 December 2015). Then, the amounts of canopy and trunks ecohydrological parameters were calculated, and finally, the efficiency of the revised Gash model for estimating interception was evaluated. Findings: In this study, the mean amount of rainfall interception in the leafed period (12.7%) was significantly higher than the leafless period (9.7%). The determination coefficient (R2) value between the estimated interception values and the measured in the leafless period was higher than in the leafed period. Based on all model evaluation metrics, the performance of the revised Gash model in estimating interception in the leafless period was better than in the leafed period. Discussion and Conclusion: Based on the findings of this study, the Revised Gash model showed good ability in estimating interception during the leafless period, and a probable reason for the high estimation error of the model in the leafed period is the lack of direct measurement of the canopy percentage parameter. Accurately determining the amount of interception, as a canopy water loss, contributes significantly to the planning and decision-making process of forest managers and water resources managers for selecting the appropriate species for plantations. Manuscript profile
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  4 - Investigating the hydrological concepts of rain in the Qur'an based on Nahj al-Balaghah
  Seyed Ali Hashemi Khanabasi Reza Norouz Valashdi
  The advancement of science in the mind of every fair person raises the question of how rain is accurately, scientifically and eloquently expressed in the Holy Book of the Qur'an and Nahj al-Balaghah. This means that these books, verses and speeches have described the na More

  The advancement of science in the mind of every fair person raises the question of how rain is accurately, scientifically and eloquently expressed in the Holy Book of the Qur'an and Nahj al-Balaghah. This means that these books, verses and speeches have described the natural elements according to the level of knowledge and understanding of the scientific subjects of their time. Therefore, in this study, the sciences in this sermon on rainfall and its request from the Creator of the universe have been studied by using the verses of the Qur'an and the interpretation of Imam Ali (as) in Sermon 115 of Nahj al-Balagheh. The purpose of this study is to compare the exact statements of Imam Ali (as) in the rain sermon with the modern science of weather and meteorology about the mechanism of formation, movement, and various forms of rainfall on Earth. Finally, different types of rain and the theory of the formation of raindrops (desegregation and bergeron) and effective rain are mentioned by carefully examining the sermon of the Prophet. Manuscript profile
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  5 - Surface runoff estimation of Wadi Ba Al-Arid watershed North East Libya, using SCS-CN ,GIS and RS data
  Salah Hamad
  10.30495/ijes.2020.674667
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  6 - شبیه‌سازی هیدرولیک سیلاب جهت تعیین حریم بستر و نقاط حساس رودخانه اترک
  وحید یزدانی محمد نظرجانی حسین علی میرزایی
  برای استفاده بهتر از رودخانه ها باید اقداماتی در زمینه مطالعات، ساخت سازه ‌ها و بهره برداری بهینه به منظور مهار، کاهش خطرات و به حداقل رساندن تبعات منفی و هم چنین به ‌سازی وضعیت آن در جهت تامین نیازهای بشری و حفظ محیط زیست صورت گیرد. مسیر مورد بررسی در استان خراسان رضوی More

  برای استفاده بهتر از رودخانه ها باید اقداماتی در زمینه مطالعات، ساخت سازه ‌ها و بهره برداری بهینه به منظور مهار، کاهش خطرات و به حداقل رساندن تبعات منفی و هم چنین به ‌سازی وضعیت آن در جهت تامین نیازهای بشری و حفظ محیط زیست صورت گیرد. مسیر مورد بررسی در استان خراسان رضوی و شهرستان قوچان و رودخانه اترک می ‌باشد. پارامترهای فیزیوگرافی با استفاده از لایه های رقومی با دقت 25000: 1 در نرم افزارهای ArcGIS و ArcView مورد تجزیه و تحلیل و برآورد قرار گرفت. برای برآورد میزان سیلاب در دوره بازگشت‎ های مختلف از روش‌ های تحلیل منطقه ‌ای، استدلالی، دیکن، کریگر و فولر استفاده شد. با مقایسه سیلاب برآورد شده به روش‌ های مختلف، بازدید های میدانی انجام شده از منطقه، بافت خاک، پوشش گیاهی، شیب حوضه، طول آبراهه اصلی، پارامترهای فیزیکی و اقلیمی محدوده‌ های مورد مطالعه، نهایتاً در زیرحوضه‌ های اترک (A1 تا A6) نتایج روش دیکن، در نظر گرفته شد. رژیم‎ های مختلف هیدرولیکی رودخانه در مورد مدل HEC-RAS شبیه‎ سازی قرار گرفته و در نهایت نتایج از رژیم جریان مناسب برای مسیر رودخانه انتخاب شد. آنگاه با وارد کردن نتایج حاصل از مدل HEC-RAS به محیط GIS با توجه به توپوگرافی رودخانه و پروفیل سطح آب بدست آمد. برای تعیین شدت و میزان فرسایش کناری با اندازه گیری دو فاکتور ارتفاع تراس‏ ها (H) و میزان فعالیت فرسایش (T) کلاسه های زیر تفکیک شده و رودخانه مورد ارزیابی قرار گرفت. برای این منظور ارتفاع تراس ‏ها با استفاده از نرم افزار HEC-RAS محاسبه و در نرم افزار Arcview در سه کلاس (H1 تا H3) پهنه بندی شد و کلاس ‌های T  با پیمایش های صحرایی نیز در چهار کلاس (T1 تا T4) تعیین شدند. نتایج مشخص نمود متوسط عمق تراس‏ های تشکیل شده در ساحل چپ و راست رودخانه بین 5-2 متر و آثار فرسایشی در بیش از 50 درصد طول مسیر قابل رویت است. نتایج محاسبات ابعاد رودخانه در حالت تعادل نهایی و شرایط آستانه حرکت در تمام مقاطع پایدار رودخانه مورد مطالعه نشان داد که در 71 درصد از مقاطع عرضی وضعیت ناپایدار و در 29 درصد مابقی وضعیت پایدار می باشد. نتایج مربوط به آنالیز حساسیت نشان داد که بالاترین حساسیت به تغییرات ضریب زبری مربوط به پارامترهای مساحت جریان و عرض سطح فوقانی می باشد. Manuscript profile
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  7 - Simulation of snowmelt runoff by (SRM) hydrological model Using MODIS Satellite Imagery
  Ehsan Fouladvand
  10.30495/jrors.2023.1974795.1169
  Prediction and estimation of runoff from snowfall and a quantitative understanding of its various production processes is considered as one of the important topics in hydrology. Therefore, the quantitative and qualitative achievement of it with a systemic approach in th More

  Prediction and estimation of runoff from snowfall and a quantitative understanding of its various production processes is considered as one of the important topics in hydrology. Therefore, the quantitative and qualitative achievement of it with a systemic approach in this regard is of importance since it forms the basis of studies of construction projects in various fields of development and exploitation in water resources and hydraulic structures and other environmental areas in the watersheds. Regarding the fact that snow cover represents the amount of stored water, so spatial-temporal (spatiotemporal) monitoring of snowmelt runoff is of great importance in hydrological forecasting in this region.The determination of the amount of snowmelt runoff is a function of regional characteristics and the availability of regional data. Therefore, in order to achieve this, ground operation and the creation of a denser network of snow survey stations are needed, which is almost impossible and is not economical. Therefore, in this study, in order to simulate runoff and estimate the share of snowmelt runoff in Marboreh River, simultaneously, optical satellite data and hydrological modelling of runoff are used as advantages. So that, snow product of the 8-day MODIS at 500-meter resolution was used to calculate the snow cover. Finally, the results obtained from runoff simulation by the coefficient of determination and subtracting volume, which were obtained at 0.93 and 3.48 respectively, indicate the high accuracy of the simulation for the area under study. Manuscript profile
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  8 - Rangeland Ecohydrology, New Paradigm in Water Management of Arid and Semi-arid Lands
  Nasrin kolahchi Mohsen Mohseni Saravi Ali Tavili Mohammad Jafari Ghasem Assadian
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  9 - Evaluation of Interception in Astragalus parrowianus, (Case Study: Gonbad Rangeland of Hamadan Province, Iran)
  Nasrin Kolahchi Mohsen Mohseni Saravi Ali Tavili Mohammad Jafari Ghassem Assadian
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