The Technical Executive Assessment of Role of Small Structures on Development of Water Resources with Approach of Outreach of Vegetation Cover (Case Study: Varamin Plain)

Assessment of natural resources projects is one of the most basic problems that are done to program the upcoming applied plans and management of these fields in different countries. In this study, the assessment of watershed operation in Tochal watershed basin was carried out through some primary studies and then integrating them together. In addition to watershed operation, was studied biological operation in study region. According to pizometric statistics wells in studied area, was appraised to improvement of water resources in before and after of Implementation of operation. At first, the efficiency percentage was determined for each of the applied structures by evaluating the condition of structures through field study. The aim of the execution of biological operation has been increase of the rate of permeability in construction operation, in addition of consolidation of sediment in area. The result of reviews show, the efficiency percentage of gabion, stone – cement, and the other structures were 75, 66, and 14. 8 respectively. In biological operation, some activities are offered, for example, nothing Spades, working Plant, seeding, drilling and protection. that among of this the proposed operation is executed: 10 hectare for working plant,1000 hectare for drilling, 700 hectare for seeding and 500 hectare for protection. The biological operation has just done for erosion controlling and soil conservation the volume of the precipitation behind the structures was calculated as 49775. 3 m3 and most of the structure capacity to control precipitation was for sediment control. Also with considering climatic parameters, SPI index statistical period was drawn. With drawing underground water hydrograph, the performance of biological and structural operation was considered in increasing of underground water level. The average of discharge has increased 30.36 liter/second.