多尺度土壤侵蚀评价指数的技术与方法

doi:10.11820/dlkxjz.2008.02.007

Abstract

Abstract:

Exploring the relationships between land use and soil erosion at different scales is a frontier research field and a hot spot topic in contemporary physical geography. As a new soil erosion model, the multiscale soil loss evaluation index (SL) has good prospects for analyzing the relationships between land use and soil erosion at multiple scales. Based on the SL equations and SL- factor meanings at different scales, this paper explains the detailed methods and GIS techniques for SL and SL- factor calculation at slope scale, small watershed scale and watershed scale. The SL- factor include rainfall erosivity factor, soil erodibility factor, topographic factor and cover/ management factor. And the GIS techniques include kriging interception, field calculation, raster calculation, expanding zones, and so on. It is expected that the methods and GIS techniques of SL calculation will be helpful for SL development and the profound research of land use and soil erosion at multiple scales.

Key words: GIS, land use, scaling, soil erosion, soil loss evaluation index

ZHAO Wenwu,FU Bojie,GUO Xudong. The Methods and GIS Techniques for Calculating Multiscale Soil Loss Evaluation Index[J].PROGRESS IN GEOGRAPHY, 2008, 27(2): 47-52.

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The Methods and GIS Techniques for Calculating Multiscale Soil Loss Evaluation Index

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