Modeling ecosystem production services (water production) in Taleghan Middel watershed

Modeling water resource systems is an essential part of the water resource planning and evaluation process. An assessment of how changes in water production and performance are important in the past and in the future. The InVEST model features ecosystem services in the form of maps with low input data levels, but high volume output data, and simplifies complex issues, thereby increasing the ability to solve problems. In the present study, the modeling of ecosystem production services (water production) in the middle of Taleghan watershed was investigated using InVEST Water Inventory. At first, the maps of the limiting root layer, the average annual rainfall, available water availability, land use and the boundary of the basin and sub basins were entered as inputs of the model and maps of the amount of water produced in each sub-area Cubic meter/year), the approximate value of actual evapotranspiration with the fraction of rainfall per pixel, the actual evapotranspiration map in terms of (mm) per pixel is estimated, the estimated water production map per pixel (in millimeters per year) Was obtained. Based on the calculations done by the model in total in the Taleghan Middel watershed, annual production of 200.9 million cubic meters of water is generated. Which has the highest amount of water production under the Hasanjun area with 59.3 million cubic meters of water produced below the Donbalid, Zidast 1 and Zidasht 2 regions.