Wind erosion plays an important role on sediment yield in complex erosion zone by wind and water of the Loess Plateau. Contribution characteristics of wind erosion to the sediment yield in the Kuyehe River watershed at time scales was estimated based on the sediment discharge records at Shenmu Hydrological Station and meteorological measurements recorded at meteorological stations in and around the watershed. The results reveal that wind erosion is a principal contributor to sediment yield of the Kuyehe River watershed. At the monthly scale, sediment yield from wind erosion had a restore-release process. Wind erosion contribution rate was the highest in March and November-December, and was lower from April to September. Alluvial sediment in winter and spring was gradually discharged in summer. The wind erosion contribution rate at the monthly scale was consistent with the wind erosion climatic factor. The amount of sediment of July and August from wind erosion occupied 80.5% of the total amount of a year. At the seasonal scale, wind erosion contribution rate in summer was the lowest of 7.8%, and gradually increased in autumn and winter, then reached the highest in spring of 28.6%. At yearly scale, wind erosion contribution rate is about 17.2% at catchments upstream of Shenmu Hydrological Station in the Kuyehe River watershed during the period 1956-1970.
LI Qiu-yan, CAI Qiang-guo, FANG Hai-yan
. Contribution Characteristics of Wind Erosion to the Sediment Yield in the Kuyehe River Watershed at Time Scales[J]. JOURNAL OF NATURAL RESOURCES, 2011
, 26(4)
: 674
-682
.
DOI: 10.11849/zrzyxb.2011.04.013
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