Study On Multi-objective Dynamic Optimize-allocation Of Water Resources Based On GIS

The problems of contradiction between supply and demand of water resources andecological deterioration of the river basins have seriously affected the region’seconomic development and the improvement of people’s living standard. These twoproblems were studied in this paper. This paper studied the optimal allocation of waterresources and ecological restoration at home and abroad and then formed the researchideas and methods.The multi-objective dynamic optimization allocation of water resources modelwas constructed on the basis of the study of the water resources allocation system,multi-objective optimization and dynamic programming theory. The model based onVisual Basic language, with the overall satisfaction of users in a time interval as thegoal, using improved simplex method to solve calculation. On this basis, the timevariable was introduced, the water resources allocation was made to reach the effectof dynamic optimization and equilibrium.In order to make the multi-objective dynamic optimization allocation of waterresources model having better visual effect, the model coupling with the geographicinformation system (GIS), to form the optimized allocation of water resources systembased on GIS. In a large amount of different structure and format of the data wereused in the construction of the system, the DEM data, geographic information data,hydraulic engineering, the optimal allocation scheme and the result were integratedinto a unified platform using a variety of platforms of the ArcGIS software, Oracle,VB and so on and a variety of integrated technology. The system divides informationinto different levels and types for their display and realizes the spatial information andattribute information interaction. That made the Man-Machine Interaction even moreconvenient, the level of management and visualization of water resources was greatlyimproved.Because water resources supply and demand contradictory is prominent in themainstream of the Huai River in the dry seasons. The model established in this articlewas applied in this area. The schemes under different reliability combination ofoptimized allocation of water resources in present situation years, short-term andlong-term planning level years were calculated on the investigation of water resourcescondition, water supply and water requirement of each user. The system classified theinformation such as the water conservancy projects, water inlets, schemes and calculation and layered display, reached attribute information and spatial informationinteraction. At the same time, the water resources scheduling scheme in themainstream of the Huai River was formulated according to the results of optimizingwater resources and applied in the study area.In view of the situation of ecological deterioration and drying up of rivers, thispaper studied the ecological restoration of dried up rivers, with the Haihe River Basinof serious ecological deterioration as an example, researched the profile of river plainof Haihe River Basin and ecological evolution. River ecological problems in theregion mainly displayed less water quantity, water quality deterioration, rivers driedup desertification and biodiversity decline. The Suggestions and measures ofecological restoration for dried up rivers were put forward. If the river course reachesthe minimum ecological flow, water compensation measures can be used to graduallyrestore the river ecosystem; otherwise, recommending the use of grassland ecosystemreplacement. At the same time, the HEC-RAS software was used to simulate the rivercource flowing process. That provided the theory basis for the ecological restorationof dried up rivers and reference for the dry river ecological restoration in similar area.