Journal of Water Science & Engineering: 5 (3)

Open Access Article

1 - Investigating the speed distribution, flow pattern, and scouring of the Simineh Rood River Bridge (Around the piers of 1-3)
غلامحسین اکبری علی جعفری

The effect of scour on water structures, including bridges, is one of the important topics in civil engineering and river engineering. Bridges are one of the oldest engineering structures. One of the most important factors in the destruction of bridges is the problem of More

The effect of scour on water structures, including bridges, is one of the important topics in civil engineering and river engineering. Bridges are one of the oldest engineering structures. One of the most important factors in the destruction of bridges is the problem of local scour around its piers. This type of scour can be recognized by the hole that forms around the structure. If this hole expands in depth, it can cause damage and eventually collapse of the bridge. To accurately check the flow and predict the local scour around the bridge piers, it is necessary to have a precise understanding of the flow pattern around the piers. By fully understanding the flow, the flow field can be completely modeled by solving the governing equations, along with solving the sediment transport equations and relying on significant advances in Computational Fluid Dynamics (CFD), an accurate method to estimate local scour. Around these structures. In this research, the simulation has been done using Flow-3D software, which is capable of simulating flow turbulence in three dimensions. For this purpose, using the Shallow water model, the characteristics of the flow, including water level, velocity, pressure, etc., due to the flow of discharge with a return period of 100 years (2723 m3/s) in the area of the beginning of the first bridge to 100 meters downstream of the Simineh Rood River Bridge was calculated. Then, using the Sediment scour model in three dimensions, the rate of development of the scouring process was investigated around piers 1 to 3 of the Simineh Rood River Bridge. Manuscript profile

Open Access Article

2 - Checking the performance of Shahin Harris algorithm in dam reservoir optimization
کبری رنجوری مهدی اژدری مقدم سید آرمان هاشمی منفرد سیما اوحدی

In any region due to the lack of precipitation and with any type of weather, there is a possibility of a drought phenomenon. This phenomenon depends on factors such as high temperature, low relative humidity, low coefficient of snow melting, wind and lack of precipitati More

In any region due to the lack of precipitation and with any type of weather, there is a possibility of a drought phenomenon. This phenomenon depends on factors such as high temperature, low relative humidity, low coefficient of snow melting, wind and lack of precipitation. Optimum exploitation of reservoirs by considering multiple important goals together and simultaneously is of great importance, and for this reason, it is necessary to manage the volume of the reservoir every month; Because the efficiency of the reservoir in flood control depends on the volume of the reservoir and its geometric characteristics and overflow. In this study, using MATLAB software and an optimal algorithm of Harris Hawks, the data of Amirkabir Karaj dam was written in order to find the optimal amount of withdrawal from the reservoir of the dam, and Harris Hawk algorithm was evaluated. The population-based algorithm performs the search process in two stages: exploration and exploitation. In Harris Hawk algorithm, there are parameters whose value change affects the performance of this algorithm. In this study, the minimum value of the objective function was investigated in Harris Hawk algorithm. By increasing the number of iterations, the value of the objective function improves, and the best value of the objective function was in iteration 64000 with a value of 25.8934, which achieved the best performance of the algorithm in this iteration Manuscript profile

Open Access Article

3 - Numerical investigation of the influence of the collar and submerged sides flush with the flow bed on the reduction of scour depth of the bridge foundation
جمال عامری ابراهیم نوحانی

Bridges are one of the most important river structures. The most important factor in the destruction of bridges is the erosion around the bridge foundations. Every year, many bridges around the world are destroyed due to not considering the role of hydraulic factors. In More

Bridges are one of the most important river structures. The most important factor in the destruction of bridges is the erosion around the bridge foundations. Every year, many bridges around the world are destroyed due to not considering the role of hydraulic factors. In this research, the effect of the combined collar and submerged plates on the reduction of scour depth of bridge foundations is investigated numerically. For this purpose, 18 experiments with different flow rates and the length of submerged plates and the location of plates tangent to the bed were evaluated and analyzed using FLOW3D software. We will increase the scouring. In general, by placing the collar and submerged plates at the same time, the depth of scouring is reduced. Manuscript profile

Open Access Article

4 - Simulation of Saland river water quality using QUAL2Kw model
محمد فلاح مریم زلقی علی افروس غلامرضا میرزاوند

Using self-purification of rivers to improve water quality is also the most economical and sustainable way for clean water. In the present study, the QUAL2Kw model is used to investigate water quality and self-purification capacity in Saland mountain river. The purpose More

Using self-purification of rivers to improve water quality is also the most economical and sustainable way for clean water. In the present study, the QUAL2Kw model is used to investigate water quality and self-purification capacity in Saland mountain river. The purpose of this study is to investigate the water quality of Saland River in relation to drinking and agricultural uses. The qualitative parameters of BOD5, total coliform and phosphate were simulated and compared with field data in January 2018 and August 2019. The results obtained from the model are to a large extent indicative of the real conditions of the river, which indicates the ability of the QUAL2Kw model to simulate qualitative parameters. According to the observational results, parameters of phosphate and total coliform in terms of agricultural use, as well as parameters of BOD5 in the studied period are not considered a threatening factor for aquatic life. In terms of potable use, according to the standard of the European Union, the American Environmental Organization and the national surface water classification of Pakistan, the parameters of BOD5 and total coliform have been observed during the sampling period of this standard. The speed of the river flow has a greater effect on the self-purification of mountain rivers, and the place of pollution of the point source has a very limited effect. According to the results of RMSE and CV parameters, the model has the best fit for BOD5, phosphate and total coliform parameters, respectively. Manuscript profile

Open Access Article

5 - Rainfall-ground water level modeling using Adaptive Neuro-Fuzzy Inference Systems
یول امان ناظری نادر جندقی مجتبی قره محمودلو مجید عظیم محسنی

Groundwater is the most valuable water resource in Iran, which is mainly influenced by rainfall patterns in a region. In the present study, 30-years rainfall and groundwater level data were used in the three watersheds of Galikesh, Ramian and Mohammadabad to model the r More

Groundwater is the most valuable water resource in Iran, which is mainly influenced by rainfall patterns in a region. In the present study, 30-years rainfall and groundwater level data were used in the three watersheds of Galikesh, Ramian and Mohammadabad to model the rainfall and groundwater level. The prediction of the groundwater level using the rainfall data for the next 12 months was done using the Transfer Function (TF) and using SAS software. Then, the validation of predicted data was evaluated using MAD, RMSE and MAPE indices. The results of the autocorrelation diagrams showed that in Galikesh and Mohammadabad watersheds, rainfall has a direct effect on the groundwater level with a delay of three months, but in the Ramian watershed, this delay was one month. It was also found that the transfer function model had a good performance in fitting the monthly groundwater level in all 3 studied watersheds Manuscript profile

Open Access Article

6 - The use of non-conventional waters, including sewage and treated wastewater, in the agricultural sector
حامد پورصمصام بهروز قمرزاده

The lack of fresh water sources as well as the decrease in the quality of water in the agricultural sector has necessitated the need to find new sources for use in irrigation. In this regard, using unconventional waters is one of the upcoming options. Reusing the draina More

The lack of fresh water sources as well as the decrease in the quality of water in the agricultural sector has necessitated the need to find new sources for use in irrigation. In this regard, using unconventional waters is one of the upcoming options. Reusing the drainage of agricultural lands as an accessible non-conventional water source is one of the ways to solve the shortage of water resources. Unconventional water resources have the potential to increase available water resources and reduce the gap between the availability and demand of fresh water in the future in water-scarce countries. Utilizing the capacity of non-conventional water resources is an example of moving towards efficient and sustainable water management solutions, which is expected to change water management and gradually shift reliance in water-scarce areas from conventional to non-conventional sources. Considering the importance of the subject, in this research, the use of unconventional waters, including drainage and treated wastewater, in the agricultural sector has been investigated by introducing the situation of drainage in Khuzestan province. Manuscript profile

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