Characteristics and hydrodynamic mechanism of sediment yield in different topographical units of different scales in Loess hilly-gully region were studied using Qiaogou Watershed in that region as prototype for observation and making use of the observation facilities therein including three hydrological stations and three large-scaled field runoff plots , which located in different topographical units. Results show that the soil erosion modulus displayed a trend of “rising-peaking-declining” with the escalation in spatial scale. At the slope scale, sediment yield was mainly related to depth of runoff. The relationship could be well described by runoff shear stress, with which sediment delivery rate increased. At the watershed scale, sediment yield was related not only to runoff depth but also to peak flood flow. Sediment delivery rate was a power function of the runoff erosion power at the watershed scale.
王玲玲,姚文艺,王文龙,杨春霞.黄丘区不同空间尺度地貌单元产沙特征及其动力机制[J].土壤学报,2013,50(2):275-280. DOI:10.11766/trxb201205070172 Wang Lingling, Yao Wenyi, Wang Wenlong, Yang Chunxia. Characteristics and hydrodynamic mechanism of sediment yield in different topographical units of different spatial scales in Loess hilly-gully region[J]. Acta Pedologica Sinica,2013,50(2):275-280.复制