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[1]HUANG Yong,QI Shi,XU Zhi-you.Gully Changes of Lanni River Watershed During 1990-2005 Based on RS at Meso-scale[J].Research of Soil and Water Conservation,2010,17(02):80-85.

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Gully Changes of Lanni River Watershed During 1990-2005 Based on RS at Meso-scale

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 02 Page number: 80-85 Column: Public date: 2010-04-20

Title:: Gully Changes of Lanni River Watershed During 1990-2005 Based on RS at Meso-scale

Author(s):: HUANG Yong¹, QI Shi², XU Zhi-you³; 1. Beijing Yongdinghe River Management Division, Beijing 100072, China;
2. College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
3. Ningxia Soil and Water Conservation Bureau, Yinchuan 760000, China

Keywords:: meso-scale; DEM; gully change; evaluation index

CLC:: S157

DOI:: -

Abstract:: The use of 3S and traditional techniques has become a hot topic worldwide in studying gully erosion changes. In this study, we take Landsat/TM images in 1990 and 2005 and 1:50 000 topographic map as source data, and take Lanni River Watershed in Xiji County in Ningxia Hui Autonomous Region as the study area. The study was supported by GIS, RS and other analysis software, 2 gully networks based on DEM were extracted automatically. In the same time, factors of slope, aspect, gully length, gully depth, ravines density, vertical slope related channel were extracted from DEM, and the gully width was by 2 TM images. According to the research needs, gully length, gully width, gully density and vertical slope were selected as the evaluation indexes to analyze gully changes of Lanni River Watershed during the past 20 years.

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