Mountainous river reach ecological flow calculation method and system based on habitat restoration

The invention provides a mountainous river reach ecological flow calculation method and system based on habitat restoration under the condition of fully considering the habitat restoration of aquatic organisms, and the method comprises the steps: obtaining the historical data of hydrology and hydraulic power and aquatic organisms of a target river reach; constructing a one-dimensional hydrodynamic model according to the hydrological and hydraulic historical data to obtain the relationship between the water level and the flow of each section of the target river reach; calculating a relative importance index of each aquatic organism according to the historical data of the aquatic organisms so as to determine a target species; on the basis of the influence factors under the optimal habitat of the target species in the spawning period, constructing a hydrodynamic force-aquatic habitat coupling model by combining the relationship between the water level of each section and the flow, so as to determine a suitable e