Study on the Effect of Power Generation Benefit Triggered by Hydrological Characteristics Because of Dam Construction

In this paper, on the basis of subentry investigation method and combining river basin characteristics, an improved subentry investigation method has been established. In order to realize watershed runoff capacity reductive, keeping water balance is a key step. In a close watershed, after dam construction real runoff capacity flowing from a controlled river cross section equals actual measured runoff capacity in the cross section adding reductive water volume in upstream cross section. According to many researches, reductive water volume is affected by social development, population increases, land use characteristics, forest area, evaporation, seepage and so on. The new method considering many calculating factors and abiding by the principle of water balance provides a gist for studying on the effect of power generation benefit triggered by hydrological characteristics because of dam construction.