[1]JIA Li-zhi,GAO Jian-en,ZHANG Yuan-xing,et al.Analysis of Rainstorm Erosion Disaster in Terrace Field in Loess Hilly and Gully Region[J].Research of Soil and Water Conservation,2014,21(04):7-11.

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Analysis of Rainstorm Erosion Disaster in Terrace Field in Loess Hilly and Gully Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 04 Page number: 7-11 Column: Public date: 2014-08-28

Title:: Analysis of Rainstorm Erosion Disaster in Terrace Field in Loess Hilly and Gully Region

Author(s):: JIA Li-zhi^1,2, GAO Jian-en^1,3,4, ZHANG Yuan-xing³, ZHANG Meng-jie³, WANG Xian-wen⁴, LI Xing-hua⁴; 1. Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
4. College of Water Conservancy and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: terraced field; soil erosion; ArcGIS; rainstorm; analysis; loess hilly region

CLC:: S157

DOI:: -

Abstract:: In view of the occurrence of serious terrace rainstorm erosion disaster and low utilization of soil and water resources problems in Yan'an in 2013, this article selects the Caoxinzhuang terraced field in Majiagou watershed as a typical terrace research site. On the basis of field monitoring, we analyzed the terraces in the worst storm regularity of cascade erosion disaster conditions. The results showed that: according to the elevation, the highest terrace erosion was slight, the percentage of erosion area increased gradually and significantly as terrace area increased. The higher terraces are mainly composed of sheet erosion with only slight gully erosion. In the lower terrace sheet erosion and gully erosion were serious. Terraced field erosion related to such conditions as the terrace catchment area, surface runoff, the main factor influencing the terraces erosion disaster is the sheet runoff. The average erosion modulus of terraced field is 20 659.7 t/hm² in Yan'an from June to September which is 47.6% more than average annual erosion modulus in this region. The critical value of rainfall causing erosion is 118.8 mm each month from June to September. The arrangement of water and sediment regulation measures is an important measure to guarantee the security of a terrace.

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