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| Morphological characteristics and causes of gullies in Yuanmou Dry-hot Valley Region |
| Yang Dan1,2,3, Xiong Donghong1,2, Zhai Juan1,2,4, Li Jiajia1,2,4，Su Zheng’an1,2, Dong Yifan1,2 |
| 1.Key Laboratory of Mountain Surface Process & Hazards, Chinese Academy of Sciences, 610041, Chengdu; 2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, 610041, Chengdu; 3.Graduate University of Chinese Academy of Sciences, 100049, Beijing; 4.Chengdu University of Information Technology, 610225, Chengdu: China |
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Abstract In Yuanmou Dry-hot Valley Region gullies are well developed, which not only encroach cultivated lands, produce large amount of river sediments, but also aggravate the development of surface erosion and accelerate the processes of land degradation. It is of great importance to carry out research on gully erosion for controlling river sediments and the sustainable development of the local economy. Based on field investigation and comprehensive analysis of literature, this paper studied the morphological characteristics and causes of gullies. The results indicated that 1) Gullies in the study area are characterized with steep gully walls, deep beds, active gully heads with projected upper parts and concaved lower ones; and 2) The strata structures, climate and rainfall, soil properties are the major causes which result in the well-developed gullies in Yuanmou Dry-hot Valley Region. On the basis of that, the key orientations of future studies on gully erosion in Yuanmou Dry-hot Valley Region were proposed, which mainly focus on monitoring method of gullies’ morphology, gully development process and its mechanism, effect of gully sediment and impacts of human activities on gully development ect.
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Received: 13 August 2011
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