基于SWEEP模型济南市典型日农用地起尘量估算

Estimation of the Soil Loss in Typical Days from Agricultural Land in Jinan Based on SWEEP Model

基于一次事件的风蚀评估模型(SWEEP)定量模拟2013年典型日济南郊区地表开放源(日最大风速大于8 m/s)风蚀起尘情况,包括总起尘量、蠕移与跃移量、悬移量、PM10起尘量。结果表明,济南农用地单位地块的起尘量存在着明显的时空差异,济南郊区全年风蚀多发生于风沙季。农用地单位地块的土壤起尘量最大位于长清区,其中单位地块总起尘量、蠕移与跃移量、悬移量和PM10起尘量分别为7.96、0.85、7.11和0.29 kg/m2。郊区各区县农用地土壤总起尘量最大为章丘市,其中起尘总量、蠕移与跃移量、悬移量和PM10量分别为798.52、88.30、710.32和29.26 t。

Single-event wind erosion evaluation program（SWEEP） model was used to estimate the quantifiable soil loss from agricultural land in Jinan, and simulate the erosion of the urban land of the typical days with daily maximum wind speed greater than 8 rn/s in 2013, including total soil loss, creep and saltation fluxes, suspension fluxes and PM10 fluxes. Results showed that there existed distinct temporal and spatial differences in dust emission of agricultural land per block. The greatest emission of soil from agricultural land per block was located in Changqing District, with the total soil loss, the creep and saltation fluxes, the suspension fluxes and PM10 fluxes as 7.96, 0.85, 7.11 and 0.29 kg/m2 respectively. The biggest total soil emission of each county occurred in Zhangqiu, with the total soil loss, the creep and saltation fluxes, the suspension and PM10 fluxes of Zhangqiu as 798.52, 88.30, 710.32 and 29.26 t.