【摘要】 采用SCS模型,USLE模型,铁钉法和养分流失公式,对巢湖龟山研究区进行了水土流失量和养分流失量的预测和估算.结果表明:研究区的平均年径流量为476.5 mm,不同土地利用类型的年径流量不同,灌丛和草地相对较小,建设用地和未利用地则较大;USLE模型和铁钉法估算的土壤侵蚀量平均值分别为4 107.57和3 847.6 t/(km2.a),且不同土地利用类型的土壤侵蚀量均存在差异;土壤养分流失量的计算结果显示,氮素为7.389 t/(km2.a),磷素为3.166 t/(km2.a);流失土壤携带是养分流失的主要形式,径流携带养分总量相对较小,其中,氮素和磷素通过土壤携带造成的损失分别占氮、磷养分流失总量的90.14%和87.37%.更多还原

【Abstract】 Prediction of soil erosion and nutrient loss quantity was conducted in Guishan Mountain,Caohu using the SCS model,the USLE model,the iron nails method and a nutrient loss formula.The results showed that in the research area,the average annual runoff was 476.5 mm,which was different with the different types of land use.Shrub land and grassland had smaller runoff,while building land and unused land had greater runoff.The estimation of the soil erosion quantity was(4,107.57)(t/(km~2·a)) by the USLE model and(3,847.6)(t/(km~2·a)) by nails law,which was different with the different types of land use.The estimation of nitrogen loss quantity was 7.389(t/(km~2·a)),and phosphorus loss quantity was 3.166(t/(km~2·a)).Nutrient loss carried by soil was the main part,while loss carried by runoff was a small part.Nitrogen and phosphorus loss carried by soil accounted for 90.14% and 87.37% respectively.更多还原