Increasing population and consequently demand for water needs, food supplies are among the limitations that the current world faces. The existence of such a process with limited natural resources needs to improve the optimal and continuous exploitation of available resources. Watershed management is one of the suitable ways to meet nutritional needs and prevent economic consequences. It is important to be aware of the effectiveness of any type of project, including water management, for project executives. The economic evaluation of these activities is essential in order to know the ratio of profit to project costs. To this end, we have investigated and evaluated the economics of multifunctional plots and flood control in Khuzestan province.