[Effects of land use change on soil erosion intensity in small watershed of Loess Hilly Region: a quantitative evaluation with 137-Cesium tracer].
Based on the land use change data and by using 137Cs tracer technique, this paper studied the change process of soil erosion intensity in Yangjuangou watershed in Loess Hilly Region. Since the 1980's, the land use intensity in the watershed decreased gradually. In 1980-2006, the slope arable land decreased from 94.9 hm2 to 0.2 hmb2, while the forest land, shrub land, orchard land, and grassland increased from 0 to 51.1 hm2, from 0 to 19.2 hm2, from 0 to 18.0 hm2, and from 76.9 hm2 to 80.1 hmb2, respectively. The soil erosion intensity was in the order of slope arable land > shrub land > orchard land > grass land > forest land. In 1980, 1984, 1996, and 2006, the soil erosion intensity was 6408.9, 5362.4, 4903.9, and 3641.4 t x km(-2) x a(-1), respectively, being changed from intense to moderate. Soil and water conservation and vegetation restoration were the main causes of the decrease of soil erosion intensity in the study area.
Wang
Ya-Feng
YF
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. wyf1912@163.com
Fu
Bo-Jie
BJ
Li
Chen-Ding
CD
Lü
Yi-He
YH
Luo
Chun-Yan
CY
D002588:Cesium Radioisotopes; D002681:China; D003247:Conservation of Natural Resources; D018556:Crops, Agricultural / Q000254:growth & development; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods; D011849:Radioactive Tracers; D012987:Soil / Q000032:analysis*; D014197:Trees / Q000254:growth & development; D014867:Water / Q000032:analysis*; D014872:Water Movements
D002588:Cesium Radioisotopes; D011849:Radioactive Tracers; D012987:Soil; D014867:Water