ABSTRACT
ABSTRACT: The alterations to hydrological cycle and the inequality of yearly rainfall to the different departments, in regional, local and global level, created the necessity for the construction of retention basins. Collected water can be used for water supply, irrigation, industry use, fire purposes, environmental necessities and other uses. Hydrogeological studies are necessary for searching suitable drainage basin areas. In addition treated used water, from secondary or advanced treatment plants can be used efficiently for secondary uses. Power production from existing or created falls to retention basins, used for multipurpose targets, can be used to offer energy.
