Construction and application of flash flood simulation and forecast-early warning models in typical watersheds of eastern Helan Mountain
To improve the forecasting and early warning capabilities for storm-induced floods in the Helan Mountain region,flood forecasting models for three typical watersheds on the eastern Helan Mountain slope were developed using the independently designed distributed hydrological model HHmodel and the two-dimensional hydrodynamic model HH2D.The distributed hydrological model divides watersheds into regular grid units to calculate runoff processes,dynamically switching runoff generation methods based on rainfall conditions and changes in soil states.The two-dimensional hydrodynamic model employs DEM data and triangulated grids to segment the region,using flow data from mountain pass hydrological stations as input for flood inundation simulations and analyses.The model's results,validated against the storm flood event of July 2018,including peak discharge,peak timing,floodplain inundation,and the flooding process after the flood come out of the mountain,demonstrated accuracy and reliability.This research provides methodologies and case references for flood forecasting and early warning in the Helan Mountain region and offers insights for flood management in arid and semi-arid areas.
flood simulationmodel constructionforecast and early warningflood inundationeastern Helan Mountain
万方数据
维普
