Authors : Hamid Shojarastegari, Seyed Hamed Shakib and Mojtaba Shakeri
Abstract: Rainfall runoff can be saved in the subsurface reservoirs in order to supply water to different rural and urban parts. Volume estimation and dimensional optimization depend on a lot of hydrological and physiological factors of the basin. In this study, the dam’s usage to provide the drinkable water was investigated in the Ziarat district located in the Golestan province. For this purpose, the sub-basins and basin’s runoff, flood potential of each sub-basin, DEM and their physiographic characteristics were determined by ArcGIS software. Then in determination of the reservoir’s optimal volume in different return periods, the cost diagram was drawn according to the reservoir’s building value and the water provision. The effective parameters in the study which include the reservoir’s Capacity (C), annually water Demand (D), the area of each sub-basin (A), Rainfall (R), Reservation assurance degree (Re), stream Length (L), average slope of each i Sub-basin (S) and Curve Number (CN) were used in non-dimensionalizing process and were used in order to determine the size of the reservoir. For this purpose, a mathematical model was presented using the exponential regression between B s and solving equations in MATLAB. Because of the lack of statistics in the hydrometric stations in the basin, the maximum flooding estimations were conducted, using the regional analysis. The instantly maximum discharge was defined as a function of basin area using the related code. By determining the initial volume and output, the modeling was conducted. Results show that these reservoirs can compensate the 11% water shortage which this province (Gorgan) faces each month with regard to 300 L sec-1 water shortage in this province.
Hamid Shojarastegari, Seyed Hamed Shakib and Mojtaba Shakeri, 2017. Presentation of Rain Water Saving Method in Rainy Regions Using ArcGIS and Regressional Analysis of Non-Dimensional Numbers (Case Study: Ziarat Basin, Golestan, Iran). Journal of Engineering and Applied Sciences, 12: 1077-1084.