Time and Spatial Variation Features of Sediment Yield Intensity on the Loess Plateau

摘要

Based on the distribution of hydrological stations and it's observation series of sediment information, and the different soil erosion type areas on the loess Plateau, the study area was divided into 292 soil erosion units. The time and spatial variation of sediment yield intensities on the loess plateau were analyzed. The results are showed that sediment intensities have changed evidently because of rainfall factor and the effects of soil and water conservation, and the sediment area with erosion modulus > 10,000t/(km~2 · a) reduced rapidly. And taking sediment yield intensity > 10,000t/(km~2 · a) as a criterion, there are 7 sediment yield centers on the Loess Plateau.