[1]GU Guanghe,WANG Yansong,ZHONG Yunfei,et al.Development Characteristics of Gullies in Rolling Hilly Regions in Northeast of China[J].Research of Soil and Water Conservation,2015,22(02):47-51,57.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 02
Page number:
47-51,57
Column:
Public date:
2015-04-28
- Title:
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Development Characteristics of Gullies in Rolling Hilly Regions in Northeast of China
- Author(s):
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GU Guanghe1, WANG Yansong2, ZHONG Yunfei2, LIU Jianxiang2, FAN Haoming1, LIU Liquan3
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1. College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China;
2. Songliao Water Resources Commission, Changchun 130000, China;
3. Liaoning Bureau of Soil and Water Conservation, Shenyang 110003, China
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- Keywords:
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rolling hilly regions in northeast of China; gully; factors; development characteristics
- CLC:
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S157.1
- DOI:
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- Abstract:
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Rolling hilly region in northeast of China is located in the center of the black soil area where gullies are ubiquitous. We examined gully development characteristics and factors affecting its development by 3S technology, computing rainfall erosivity, slopegradient and slope length. The results show that 75.11 percent of gullies in this area are at early or middle development stage and they have great developmental potential dangers. The intensity of erosion gully development in the study area has significant regional differences, the gully densities in the south and north of study area are 0.3, 0.06 km/km2, respectively. The differences of terrain, freezing-thaw duration and temperature are the main reasons that caused rainfall erosivity, which has significant impacts on gully development in the northern, less impacts on gully development in the southern. Slope gradient and slope length have positive correlations in the study area, slope in the northern area is small and it has positive correlations with gully density, slope in the southern area is big and it has negative correlations with gully density, topographic factors in the northern and southern areas have positive and negative correlations with gully densities, respectively; with the growth of slope length, the gully density increases firstly and then decreases, the critical slope length is 900 m.