Water Engineering: 4 (2)

Open Access Article

1 - Assessing Drains Effluent and Its Impact on Shadegan Pond Water Quality Regarding The five-day biochemical oxygen demand and chemical oxygen demand
Reza Haghdoost mohsen solimani babarsad

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Open Access Article

2 - Locating Suitable Sites for Building underground Dam using AHP Multi-criteria Decision Making Method
Farid Dorfeshan Mohammad Heidarnejad Amin Bordbar Hassan Daneshian

Use of underground dams can be beneficial for optimal expansion and utilization of water and also for underground water storage. Considering the prevailing conditions in the region of Andika in Khuzestan Province, building underground dams may be an appropriate strategy More

Use of underground dams can be beneficial for optimal expansion and utilization of water and also for underground water storage. Considering the prevailing conditions in the region of Andika in Khuzestan Province, building underground dams may be an appropriate strategy to offset water shortage during the dry months of the year because construction of such dams in this region entails low costs and the dams will have acceptable efficiency. Many criteria and factors with different degrees of importance are involved in locating underground damsites. Therefore, synchronization of the geographic information system (because of its high capability in analyzing spatial data) and analytic hierarchy process was used to study and apply the role played by each of the mentioned factors (while considering the degrees of their influence in selecting the suitable sites), and the desired results were obtained. The present research used a decision tree that included the reservoir and economic criteria each with its own subcriteria. For the reservoir factor the four subcriteria of slope, hydraulic conductivity, effective porosity, and permeability of dam foundations and for the economic factor the two subcriteria of damsite and its distance from the water use location were considered. Twenty seven sites were initially selected to determine dam axes at the desired sites. The positions of the selected sites were then considered on the map and the spatial priorities of 15 sites were introduced. Finally, the storage volume of each proposed priority was calculated. Manuscript profile

Open Access Article

3 - Study of effect of wave refractive index and bed roughness on wave distributionpattern caused by wind wave in areas near the coast.
reza Farshad Morteza Bakhtiyari

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Open Access Article

4 - A Physical Comparison Between Available Hydraulic Models Regarding the Depth of Unsteady Flow
Amin Bordbar

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Open Access Article

5 - Evaluaation and selection process or municipal wastewatertreatment with a structured approach and optimal with methodAHP(Case Study:Shoushtar City)
Farzad Gholipour Sayed Mahmood Jazayeri

Abstract Application software and mathematical models in wastewater treatment processes combined with technical know-how precious time is to be.treatmen wastwater, in order to stabilize the organic matter in large and small communities done intermediate good water and s More

Abstract Application software and mathematical models in wastewater treatment processes combined with technical know-how precious time is to be.treatmen wastwater, in order to stabilize the organic matter in large and small communities done intermediate good water and sanitation can be considered the value is added and the resulting solid material reuse it to produce effluent standard and to strengthen the underground aquifers done, as part of this research using the analytic hierarchy process (AHP) and the work developed by the Expert Choice software relying on the experts compared the different processes were, of the five selected processes with weights WETLAND (0.399) and weight POND (0.351) BIOLAC with (0.108) and weight SBR process (0.085) and CAS weight (0.057) WETLAND option or Wetland with subsurface due weight should mention (0.399) has been chosen. in another part of the city of Shoushtar research using case study and review laboratory results,Confirmed that to design and build a wastewater treatment plant wastewater is important both quantitative and qualitative parameters and the financial comparison and evaluation processes of the study verified a first method (AHP) as a result, natural and semi-natural method because the process of being cheap and relatively quick return on investment with good efficiency Been selected. Manuscript profile

Open Access Article

6 - Evaluation of mixing air with the water flow in different step of skimming flow on stepped spillway by FLUENT model and a physical model
Meisam Sadrianzade Mohammad Mahmoudian Shoushtari Ahmad FAthi Hossein Eslami

In this paper, physical model of a stepped spillway flow with skimming software,simulated by Fluent and Gambit software.In this simulation, the k- ε model in RNG, Mixture, and Enhanced wall treatment are applied to respectively model the turbulence , the multiph More

In this paper, physical model of a stepped spillway flow with skimming software,simulated by Fluent and Gambit software.In this simulation, the k- ε model in RNG, Mixture, and Enhanced wall treatment are applied to respectively model the turbulence , the multiphase flow, and the flow near the walls with attention to the specific hydrodynamic of the flow on the stepped spillways.Also , the PRESTO algoritm and the SIMPLE method are respectively used to dissociate pressur equations and to relate pressure-velocity equations.After calibration of the numerical model with experimental model, assuming an experimental model of precision, a margin of error of 6.6% was obtained for the numerical model. Then, by examining the concentration of dissolved air in the water flow, the result was evaluated for geometry and discharge studied,motion in the direction of the flow mixture concentration in the water increases.After concluding the percentage error of the numerical model, the numerical and graphical results analysis of two-phase flow of water - the air is present. Manuscript profile

Open Access Article

7 - Empirical methods Comparison of estimation evaporation From Free Water Surface (Case Study: Dez Regulatory Dam)
Mehdi Najafvand Derikvandi Hossein Eslami

Evaporation is an important factor in the management of water resources and accurate calculation can be effective strategies to mitigate the effects of drought and implemented in order to protect water resources. Due to lack of evaporation stations and lack of adequate More

Evaporation is an important factor in the management of water resources and accurate calculation can be effective strategies to mitigate the effects of drought and implemented in order to protect water resources. Due to lack of evaporation stations and lack of adequate data, empirical methods can be used to estimate evaporation from water surface. In this study, evaporation estimated using 10-year data of Dez adjustment dam station and empirical methods of Mayer, Marciano, Shahtin, Hefner, Ivanof, Tichomirof and USBR and the estimated evaporation compared with pan evaporation values. Based on the R2 and RSME statistics, empirical methods were evaluated. The results showed that the relationship Mayer (R2 = 0.886, RMSE = 1.53) than other experimental methods is more accurate. The USBR equation (R2 = 0.91, RMSE = 1.967) lie in next rank and also a significant difference (P> 0.01) is not seen between actual and estimated values in two ways. Tichomirof method due to significant error (RMSE = 8.152) and lower fitted to actual data (R2 = 0.33) is the lack of credibility and Hefner, Marciano, Ivanof and Shahtin with a determination coefficient equal to 0.548, 0.534, 0.639 and 0.664 have modest validity and reliability for estimating the amount of evaporation from water surface. Manuscript profile

Open Access Article

8 - Genetic Algorithm Study and Applications in Engineering and Water Resources Management
Seyed Mostafa Tabatabaei Ali shahidi Shahidi seyed reza hashemi

Considering extent and complexity of water resources systems, it is necessary and requires a comprehensive optimization process to determine the policy and select options and proper strategies For proper operation of water resources systems in different circumstances. I More

Considering extent and complexity of water resources systems, it is necessary and requires a comprehensive optimization process to determine the policy and select options and proper strategies For proper operation of water resources systems in different circumstances. In this study the necessity of using evolutionary optimization techniques and discussed a brief description on how to implement a genetic algorithm operators as the most evolutionary practical methods. More studies on genetic algorithm are presented in several sections. In the following, has been investigated advantages and limitations of genetic algorithm and then, presented research on several sections.The results show that Genetic algorithms in solving various problems of water resources, efficiently comes from dissolving the issues with a large space and solve complex problems while ability to achieve the global optimum can be provide in different conditions a series of acceptable answers as solutions. For increase the efficiency of the algorithm and achieving better solutions, According to the nature of the problem can be take optimal advantage of improved versions or combine with simulation models or other methods of mathematical. Manuscript profile

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