Abstract: Disclosed is a method for calculating grading and staged drought limited storage capacity of cascade reservoirs in different stages of drought, including: obtaining a characteristic storage capacity of an aggregated reservoir after aggregation and generalization according to a characteristic storage capacity of single reservoirs; determining a stage of drought early warning of the aggregated reservoir; calculating the water inflow of the aggregated reservoir after aggregation and generalization by superposition according to the water inflow of the single reservoirs; calculating a design water supply of the aggregated and generalized reservoir by superimposing the design water supply of single reservoirs; grading drought limited storage capacities into a drought warning storage capacity and a drought guaranteed storage capacity, and setting water supply coefficients for the graded drought limited storage capacities to realize drought early warning and water supply limit; and comprehensively calculating the dro

Abstract: The present invention discloses an embedded urban design scene emulation method and system. The method includes the following steps: constructing a status quo urban three-dimensional model scene according to collected oblique photography data; loading a three-dimensional model of urban design to a scene, and extracting geometric attributes for generation of buildings; unifying a space coordinate system of models and scenes, and automatically determining a space matching degree by taking buildings as a basic unit, and marking matched buildings with Y and mismatched buildings with N for distinction; for a region with the buildings marked with N, performing a local flattening operation in a three-dimensional model scene of oblique photography to flatten stereo data; for a region with the buildings marked with Y, performing real-time space editing in the three-dimensional model of urban design to hide the marked buildings; and opening two sets of processed space data to implement mosaic display.