Water Engineering: 4 (3)

Open Access Article

1 - Investigation of the effect of blade length change on scour control in a semicircular support in a river bank using a laboratory model
Seyed Milad Balalzadeh Amiabbas Kamanbedast Ebrahim Nohani

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Open Access Article

2 - Locality Evaluation of Urban Waste Landfill (Case Study: Andika Township)
Ali mohamad emami

Abstract One of the serious, potential and growing problems in many urban areas, especially in developing countries, is the management of waste and the selection of suitable sites for its disposal and burial. This issue is very important for our country, and especially More

Abstract One of the serious, potential and growing problems in many urban areas, especially in developing countries, is the management of waste and the selection of suitable sites for its disposal and burial. This issue is very important for our country, and especially the Andika, due to issues and constraints, and most importantly the challenge of quantity and quality of water. Therefore, in this study, suitable locations for dumping landfills in the Andika city using the integration of GIS spatial knowledge and multi criteria decision analysis on hydrological factors, human factors and accessibility, geomorphology, geology and ecology were extracted and introduced. For this purpose, 15 layers of input map were prepared and analyzed in GIS environment. Effective factors were weighed, limitations were applied and places with high, moderate and low proportions in the Andika township were extracted and suggested. Manuscript profile

Open Access Article

3 - Numerical Analysis of the Scouring Pattern of Straight Spur with Different Permeability in the River Route
naser ghanie Abbas mansori

In this research, a numerical study on the series of straight spur in clear water conditions with a Permeability of 0, 35 and 50%. and the effect of grain size, and also hydraulic condition on scouring around them, and in order to Numerical analysis of the Effect of str More

In this research, a numerical study on the series of straight spur in clear water conditions with a Permeability of 0, 35 and 50%. and the effect of grain size, and also hydraulic condition on scouring around them, and in order to Numerical analysis of the Effect of straight spur Permeability on current Pattern and Scouring Using Model flow 3 d the results show that in fixed distance between spures, with flow increases, the scour depth increases.. In constant flow, by increasing distance between spures, the amount of relative scour depth is decreasing and the most of depth of scour occurs in vicinity of first spure. Also, in fixed grain size, by increasing the froude number, also the amount of relative scour depth is increasing. Manuscript profile

Open Access Article

4 - Investigation Effective Factors On Energy Depreciation Of Stepped Spillways
saeed razmara Abbas mansori

In recent decades, stepped spillways have been a significant role in this case.. This research is based on The flow energy calculated on these edged steps and simple steps in nappe flow and skimming flow regimes. Difference in height, width and edge slopes will determin More

In recent decades, stepped spillways have been a significant role in this case.. This research is based on The flow energy calculated on these edged steps and simple steps in nappe flow and skimming flow regimes. Difference in height, width and edge slopes will determine the effects of each of these parameters on energy dissipation ratio And then the analysis of sixteen model with different geometries were conducted by Gambit and Fluent software for two discharges ٣/٦ lit/s (nappe flow) and ٢٥ litr/s (skimming flow) by the total of ٣٢ models. And with regard to the results achieved, the influence of the edge for nappe flow has been regarded according to Chamani and Rajaratnani equations. With regard to the results, it is suggested that the existence of the edge at the step end can be enhanced the energy dissipation ratio along the stepped chute. Of course the ratio of this effect in flow and skimming regimes are not the same and these effects are decreased by increasing of discharge. Manuscript profile

Open Access Article

5 - Numerical sStudy of Souring Effect of L-shaped Crowns on Erosion Pattern
Ali Afroos salva abyat

Abstract In this study, the effect of two full-float crowns on reducing scouring around the axial axially was evaluated numerically using flow 3d software and the results were compared with the same laboratory study and a useful application graphic was extracted in this More

Abstract In this study, the effect of two full-float crowns on reducing scouring around the axial axially was evaluated numerically using flow 3d software and the results were compared with the same laboratory study and a useful application graphic was extracted in this field. It was determined that the dimensions of the crown have a significant effect on its performance. The results showed that with increasing crown dimensions its performance improves.by comparing two types of crowns, it was found that if the crown reaches along the length of more than half the support length, the crowns of the el form more effective than the full crown. The crowns are better off because they do not prevent the movement of sediments from the rising vortex activity at the bottom of the arm; on the other hand, the crowns of the shape due to the smaller area than the crowns, if applicable, are applied. Economically, they will be more economical Manuscript profile

Open Access Article

6 - Review and Compare of Hydraulic and Low-Pressure Polyethylene Canalet and Pipe Run
mahmoud malekpour Bfhrooz Dahanzadeh

Iran is one of the countries that most of it has a warm climate, dry and semi-dry.The average rainfall in the world that is 860 mm and 240 mm in Iran Rainfall precipitation in Iran is very low . Meanwhile, with the increase and construction of wells excessive and uncont More

Iran is one of the countries that most of it has a warm climate, dry and semi-dry.The average rainfall in the world that is 860 mm and 240 mm in Iran Rainfall precipitation in Iran is very low . Meanwhile, with the increase and construction of wells excessive and uncontrolled exploitation of reserves of underground water in the water level drastically gone down and our country grew and population growth, it is necessary for the optimal use of water resources and Precipitation of modern methods of irrigation. That's why in this case study on the plain Arayez located in the city of Susa to investigate and compare the performance of your channel and one of the modern irrigation techniques the pipes of low pressure polyethylene hydraulically using the principles of design, drawings, documents Treaty, books, articles, pamphlets, calculations, hydraulic modeling, observations and field surveys of the materials, performance, time has run out. The results showed that due to fewer losses of water and efficient use of water, speed of operation and high ease of implementation, water delivery to beneficiaries in a shorter time, toss less land and more efficient use of hydraulic head water pipe of low pressure polyethylene on channel is preferred. Manuscript profile

Open Access Article

7 - Investigation of Scouring Pattern Around the Axillary Screw Bridge in the Form of Pollen and Triangular Fish with their Observation and Comparison
mahmmod valipour morghmaleki mohsen solimani babarsad

There are currently several methods to prevent scouring the bridge base. These methods can be divided into two general categories. The first group is to increase the strength of the substrate materials against erosion, such as the use of a gobion, a rap ramp around the More

There are currently several methods to prevent scouring the bridge base. These methods can be divided into two general categories. The first group is to increase the strength of the substrate materials against erosion, such as the use of a gobion, a rap ramp around the bridges, and the second one, by changing the pattern of the flow around the bases, reduces the strength of the erosion factors, which are the collars, And bridge bridges are examples of these methods. In this research, the experimental study of the impact of the bridge nose bridge on the scour depth reduction was considered. For this purpose, 22 experiments were carried out in the vicinity of the pollen and triangular nests at four angles (0.70,75,80.90) 215/0, 232/0, 261/0). According to the results of the experiment, the reduction of scour depth in the triangular nose support for different floats in all angles had the best performance in reducing the scour depth during the experiments. Manuscript profile

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