地理学报(英文版)

Journal of Geographical Sciences ›› 2007, Vol. 17 ›› Issue (3): 375-383.doi: 10.1007/s11442-007-0375-4

• Climate and Environmental Change • Previous Articles    

Soil erosion along a long slope in the gentle hilly areas of black soil region in Northeast China

CUI Ming1, CAI Qiangguo1, ZHU Axing1,2, FAN Haoming3   

  1. 1. Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China|
    2. Department of Geography, University of Wisconsin 550 North Park Street, Madison, Wisconsin 53706, USA|
    3. College of Water Resources, Shenyang Agricultural University, Shenyang 110161, China
  • Received:2006-11-22 Revised:2007-03-29 Online:2007-09-25 Published:2007-09-25
  • Supported by:

    National Basic Research Program of China, No.2007CB407207; Knowledge Innovation Project of Institute of Geographic Sciences and Natural Resources Research, CAS, No.CXIOG-A04-10, and the support from CAS through its “One Hundred Talent” program

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Abstract:

Characteristics of soil erosion change along a long slope in the gentle hilly areas in black soil region in Northeast China are discussed. A simplified slope model based on seg-ments was used to analyze the runoff data and soil erosion data observed between 2003 and 2004 over 10 field plots with different slope length in Heshan Farm, Heilongjiang Province. We found that soil erosion rate over long slopes in the black soil region changed alternatively along the slope and creates alternative zones of intensive erosion and week erosion.The exact place of each zone is different for different rainfall conditions. In a year with less and mild precipitation, rill cannot happen within the top 50 m, while in a year with large and inten-sive precipitation, rill can be formed starting even at 15 m from the top of the slope.

Key words: gentle hilly black soil region, alternative change, erosion zone, plant hedgerow