Analysis Of Landscape Pattern-Soil And Water Loss In Dongzhen Watershed Based On GIS

Since long ago, the Soil and Water Loss causing the ecological environment question arouses the widespread interest; Our country majority of areas precipitation centralized, the ecology destruction causes Soil and Water Loss to be serious. In recent years, the unreasonable land utilization, the mountainous region development and so on, seriously affected the region landscape overall pattern in particular, the landscape pattem change has been directly affected Soil and Water loss degree. In the water source place, its landscape pattern change not only creates serious Soil and Water Loss in particular, moreover also causes the non-point source pollution to intensify. Therefore, exploring the different landscape pattern from the landscape criterion to the Soil and Water Loss inflfluence, relating Soil and Water Loss with the landscape pattern, is important research topic in water and soil science and the landscape ecology at present. The paper in the domestic and foreign landscapes pattern analysis and in the Soil and Water Loss research foundation, take the Putian Dongzhen reservoir watershed as the research background, uses the landscape pattern analysis method, the artificial nerve network model - BP network model; Take Arc/Info、Areview、Mapinfo geographic information system software and PCI Geomatica remote sensing software as aplatform, has established Dongzhen reservoir watershed landscape pattern space database; has Studied on variation of the influence Soil and Water Loss landscape factor, the landscape pattern analysis, between the discussion landscape pattern and the Soil and Water Loss relations as well as the humanity moves to the landscape pattern and the Soil and Water Loss influence; And in this foundation, utilizes the BP network model simulation landscape pattern change, according to result which simulates, initially judges Soil and Water Loss the strong and the weak and the landscape pattern condition, also may forecast Soil and Water Loss with the landscape pattern development tendency, provides the certain help for the Soil and Water Loss research work; Finally proposed from the landscape ecology construction the comprehensive program of public order Soil and Water Loss measure and the suggestion, as well as the landscape pattern optimizes with continues to develop the pattern, provides the basis for the Dongzhen reservoir watershed Soil and Water Loss plan and the government.