Critical topographic threshold of gully erosion in Yuanmou Dry-hot Valley in Southwestern China

• Published in: Physical geography Vol. 34; no. 1; pp. 50 - 59
• Main Authors: Dong, Yifan, Xiong, Donghong, Su, Zheng'an, Li, Jiajia, Yang, Dan, Zhai, Juan, Lu, Xiaoning, Liu, Gangcai, Shi, Liangtao
• Format: Journal Article
• Language: English
• Published: Abingdon Routledge 01.02.2013; Taylor & Francis
• Subjects: Asia; Bgi / Prodig; China; critical threshold; gully; gully initiation; morphological parameter; Physical geography; Yuanmou Dry-hot Valley; China; Yunnan; China, People's Rep; Rill wash; Topography; Arid area; Soil degradation; Digital elevation model; Plant cover; Geographical information system; Gully erosion; Threshold

Gully initiation has been a subject of much discussion in the field of gully erosion. Gully initiation could be examined by the S-A relationship (S = aA − b ) between the critical slope of the gully head (S) and the upstream drainage area (A). Gully erosion plays an important role in sediment yield...