The need for energy is multinomial, the plausibility this become apparent because of rapid population growth, urbanization, the standards of living, industrial, and agricultural expansions. Unfortunately, the drastic demand of energy hardened in developing country. Therefore, it is advisable to use the nearby available natural resources (i.e. river and suitable topography) for potential assessment without unmanageable effects to environment as it goes with increasing and diversified energy demands. Selecting the most feasible potential site from hydrological, topographical, soil, and geological point of view and identifying the possible flood event if there is before implementation of hydropower project is critical issue that has to be investigated thoroughly. This could be cost and time effective to know the potential capacity of the proposed area's constitute for further planning and designing of the project to lighten unwieldy problem.