Research Of GIS-Based Digital Runoff & Convergence Model On Basinon

Attracts worldwide attention the divert water from the south to the north project had been through repeatedly 50 year comprehensive thorough proofs to begin in 2002, to symbolize smoothly the project changed over to the comprehensive implementation stage by the plan design stage. The divert water from the south to the north project implementation, will form the local surface runoff, the ground water, the Yellow River water, the Yangtze River water in the Dongping Lake region and so on the multi-water source union dispatch pattern, the Dawen River basin originates as the Dongping Lake only surface runoff, finds out its may the volume of diversion and comes the water process regarding to display Dongping Lake' s flood prevention fully, to store and regulate with the water supply function, then will realize the region water resources optimized disposition all to have the extremely vital significance.This article take the northward rerouting of southern river Shandong section dispatcher movement management system management system construction as a backing, in 10^th five year country significant technical equip development (technical attack) topic— "water resources optimization disposition model and expert decision support system development" (project serial number: ZZ02-03-05-01-02) in the frame, produced the afflux model in the Dawen River basin in the research to introduce the soil average concept, replaced the original FCB structure with the free water storage reservoir structure, constructed has produced the afflux model based on the GIS Dawen River basin distributional three water source Xin' an river, the riverbed afflux uses the Muskonggum root law, in the use basin history hydrological data has carried on the rating to the model parameter. Established " the Dawen River basin take this model as the core to come the water forecast system" .In distributional produced the afflux model the computing element division aspect, the this article dissect based on the GIS basin river system essential factor extraction technology, by Dawen River basin 1: 50,000 DEM was the foundation, the convective region river system has carried on the automatic extraction, had determined the basin boundary, has divided the sub-basin, produced the afflux model for distributional three water source Xin'an river the computation to prepare the essential foundation terrain data. Using GIS and the RS information compound technology, built has produced.the afflux process the computer simulation platform.This research practice indicated that, selects the distributional three water source Xin'an river model to carry on the forecast and the simulation to the Dawen River basin rainfall - runoff process is completely feasible, the model may to be similar the Dawen River basin half arid half moist basin to produce the afflux to carry on the quite accurate simulation. This research achievement may in the northward rerouting of southern river east line Shandong section along the route various basins promotion application, produces the afflux computation regarding the northward rerouting of southern river east line entire line and a median line basin also to have the extremely important model significance.