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[1]CHENG Zheng,YAO Zhi-hong,ZHANG Jing,et al.Establishment and Application of Digital Watershed in the Red Earth Areas, Southern China[J].Research of Soil and Water Conservation,2012,19(03):12-15.

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Establishment and Application of Digital Watershed in the Red Earth Areas, Southern China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 03 Page number: 12-15 Column: Public date: 2012-06-20

Title:: Establishment and Application of Digital Watershed in the Red Earth Areas, Southern China

Author(s):: CHENG Zheng¹, YAO Zhi-hong², ZHANG Jing¹, YANG Qin-ke¹; 1. College of Urban and Resources, Northwest University, Xi’an 710127, China;
2. College of Resources and Environment, North China University of Water Resources and Electric Power, Zhengzhou 450011, China

Keywords:: digital watershed; Hc-DEM; terrain factor; soil erosion

CLC:: S127;S157

DOI:: -

Abstract:: Digital Watershed is a digital representation of watershed with digital thematic maps, remote sensing images, tables and corresponding models, which provides supports in the accurate management and evaluation of watershed. Through digital terrain analysis, remote sense interpretation and field investigation, the digital watershed in the red earth area of southern China is established, and soil erosion intensity is evaluated in terms of different grades in this study based on the topographical maps of 1：50000 and remote sensing images of 2.5 m. The results showed that: (1) integrating Hc-DEM, terrain factor, land use, vegetation cover and soil conservation, the established digital watershed could present the different patterns in land use and soil conservation between pre-and post-periods of soil conservation; (2) erosion intensity was mainly associated with moderate and strong erosion levels throughout the entire study period, while in the post-period, slight erosion increased dramatically and moderate as well as strong erosion presented the opposite trend. This study could be helpful for soil and water conservation benefit evaluation and watershed management.

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