The Small Watershed Soil Erosion And Influencing Factors Of Three Dimensional Simulation Based On GIS And Virtual Reality Technology

Analysis and evaluation of small watershed conditions and comprehensive treatment effect, not only to promote the development of the regional soil and water conservation, also can promote the development of regional economy. It is widely used in every field that we can realize the space-time of building virtual scene though the virtual reality technology, but the application in the professional research and application of soil and water conservation is not enough. To reflect the spatial distribution and the variation of soil and water loss, all kinds of factors visually intuitively and accurately, I will combine the virtual reality technology and water loss and soil erosion and impact factors of three dimensional simulation, for the Yimeng mountain area small watershed comprehensive treatment, and providing new method and the way to optimize the design of the small watershed planning, to help to promote informatization construction and development of soil and water conservation.Taking small watershed as an object, Yimeng mountain area nine Fairmount base of provisions, good grades who pills,1:1 topographic map, using geographic information system (ArcGIS), virtual reality (VR) technology, based on the analysis of water loss and soil erosion impact factor conditions and changes of typical years, on the basis of comprehensive evaluation method is used to carry out the comprehensive evaluation of soil and water loss and the dynamic change, and through the 3 d simulation, created the small watershed soil erosion factors and soil and water loss in the three dimensional simulation, multi-angle, real-time, intuitive observation, analysis and evaluation of small watershed conditions play a good supporting role.(1)Nine town in the small watershed land use is given priority to with cultivated land, forest land, both accounted for 75% of total area. Cultivated land is mainly distributed in the south mountain valley inclined plain north of low hilly land, forest land distribution; The most obvious change is that the irrigable land, drought terrace, terrace orchards, orchard increased, change is mainly caused by new orchard; Other land use types change smaller. Largest proportion of vegetation coverage in coverage, low coverage and medium coverage change is bigger, low coverage increased 30.70 hm, covered in reducing 23.30 hm, followed by high coverage, and other vegetation coverage level change amplitude is smaller.(2)Compared with 2009,2013 soil erosion area reduced 27.18 hm2. The mild erosion area biggest change, reduced 46.36 hm, moderate erosion area of 16.32 hm, increased strong erosion area of 2.66 hm increased; Is the main characteristics, give priority to with mild erosion of arable land for new orchard, the level of erosion intensity from mild to moderate, moderate erosion increases; Local tourism development in the basin is to build infrastructure, which leads to the strong erosion area increased; Spatial distribution of soil erosion intensity present some regularity, from low to high elevation presents erosion intensified trend.(3)The soil and water conservation measures the total management area of 19.12 hm2, increased the terrace area increased 2.18 hm2 squared, the arbor area is decreased by 26.10 hm2, shrubbery area of 25.06 hm2, increased JingGuoLin increased 17.98 hm2 squared, new shuitangba four water conservation project.(4)According to the actual situation of soil erosion of small watershed, with the help of virtual reality technology to simulate the outline of the small watershed. Explore the ArcGIS 3 d modeling and VUE10 XStrem three-dimensional simulation. Exploration is an effective means of analysis of soil erosion spatial performance. Based on ArcGIS for 3 d visualization rendering output is insufficient, explored the natural environment of the high precision of terrain rendering output and performance. The construction of a three-dimensional scene of small watershed, visualization has carried on the research and exploration, and implemented in the 3 d scene roaming, and freedom to browse, and other functions.Virtual reality technology analysis of soil and water loss, land use, vegetation coverage, etc., summarizes the influence factor space change rule and trend of soil and water loss. The innovative 3 d simulation reality technology used in soil erosion monitoring. True representation of 3 d virtual view of the small watershed, and implement changes to the space of soil and water loss monitoring of intuitive, authentic, accurate simulation, is an innovation of soil and water loss monitoring, for future planning of small watershed management provides a new method and way.