Assessing soil Soil Eecological Eenvironmental Qquality Assessment in a County of Northwestern Sichuan Province: a case study for a county in northwest Sichuan Province
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Abstract:
The current soil assessment method focuses on the application function of soil, while the ecological environment function is not largely considered. In order to examine the soil quality assessment method in consideration of ecological environment function, an ecological environment quality assessment index system was developed to evaluate the soil quality of Luding County, The conditions of terrain and geomorphology in plateau area are key factors influencing soil preservation and land developing methods, and thus make great effects on soil ecological environmental quality (SEEA). This paper presents a method to evaluate the soil quality for Luding county, a typically geological environmental vulnerable district of ecological environment. The system was based on, based on land use the consideration in meeting the demand of soil ecological environmental preservation. The study and incorporated the topographic factors such as slope, aspect, and elevation as well as the common variables relating with soil development into the assessment index system. GIS, RS, and Analytic Hierarchy Process (AHP) technique were employed to analysis the spatial data and form the thematic maps ofobtain the thematic maps of evaluation indexes assessment factors, which were overlaid to generate the soil ecological environment quality map of Luding County. The ultimate soil quality level map was obtained through graphical overlaying process. The results indicated the substantial main factors affecting the soil ecological environment quality in the study area includecorrelating with the SEEA are the slope, precipitation, elevation, vegetation index, and soil texture, etc.. Comparing tThe soil ecological environment quality assessment results of SEEAwere compared with the topography, land use, and ecological environment factors, which suggested that the assessment results are in accordance with the actualreal conditions in the study area, a well matching result between the two can be easily found.
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