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《Chinese Journal of Soil Science》 2017-04
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Development Characteristics of Sink Holes in Gullies on the Northern Loess Plateau

JIN Shan;JIA Yu-hua;GUO Cheng-jiu;DONG Shuang;College of Water Conservancy, Shenyang Agricultural University;Institute of Geographic Sciences and Natural Resources Research, CAS;Liaoning Shuangtai Estuary Wetland Ecosystem Research Station;  
We discussed the morphology, distribution and influence factor of sink holes in gullies on the Northern Loess Plateau through field investigation and statistical analysis. The results showed as follows:(1) The morphological types of sink holes were distinguished as being shallow dish, funnel-shaped, shaft-shaped and gourd-shaped. Typical plane forms tended to be circle and oval in shape. Their evolvement stages were classified into youthful stage, mature stage and disappearance stage, and those in mature stage accounted for 72.8%. The sink holes were relatively small in dimension, and(2) Significant correlations among various shape parameters were found, and the relationship between major axis and minor axis was fitted as significant linear equation.(3) Sink holes in gully mainly appeared in the upstream channel and branch head of the gullies, and accompanied loess bridge and gully-head waterfall in general.(4) Gullies provided development space for sink holes, while sink holes would benefit the promotion of gully erosion.These findings enriched the knowledge of sinkhole morphology and distribution in the gullies. It would be helpful for deeply understanding piping erosion and its relation with gullies as well as soil erosion control in the Northern Loess Plateau.
【Fund】: 国家自然科学基金项目(41571221);; 中国博士后科学基金项目(2015T80129)资助
【CateGory Index】: S157
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