Optimizing Of Regiong Soil Erosion Model Based On GIS

Regional soil erosion model is an effective tool for predicting the loss of soil and water, planning soil and water conservation, optimize the utilization soil and water resource. It's not only a new soil erosion research area but an important practice tool for soil erosion survey. This paper make use of the basic function of GIS, take Yanhe drainage area as study area, based on analysis of regional soil erosion processes, according to the principle of hydrology and soil erosion, using software engineering method, combined previously researches on regional soil erosion model, repaired, improved and optimized previous arithmetic and program, developed Regional Soil Erosion Model-Yangling based on GIS. The model developed with ArcGIS Enginee and C#.NET 2005 develop tool,The main results are as follows:(1) Revised (Improved) the main architecture and graphic user interface of model software, made it from an embedded system to an independence application system.(2) Studied multi-thread, regional template and parallel traverse methods on resional soil erosion model, reduced its'run time. Through distributed parallel computing experiment, greater regional calculation method was gained(3) Its more convenience to debug and analyse model after designed data frequency curve tool and sensitivity analysis tool.(4) Designed layers model to manage record file and data file. This method made files management more effective.The software not only offer a simulation tool for regional soil erosion census and dynamic monitoring, but also can enlarge application field for the soil erosion course research.Its implement methods and arithmetic have strong practicality value in GIS spatial analysis.