摘要
根据对试验流域土地利用现状的实地调查 ,在GIS技术的支持下 ,结合林冠截留模型、枯落物糙率系数模型、SCS水文模型、径流小区产沙量经验模型、栅格单元泥沙输移量模型 ,以试验流域空间数据库和属性数据库为基本参数输入 ,对试验流域 1996～ 1998年 8场典型降雨土壤侵蚀量的空间分布进行了模拟。模拟结果显示 ,裸荒地场降雨产沙量占场降雨侵蚀总量的 92 4 7%～ 10 0 % ,水源保护林地 (包括刺槐和油松林地 )的产沙量占总侵蚀量的 15 2 3%～ 7 5 3% ,水源保护林的土壤侵蚀控制效应非常显著。对试验流域 1997 0 7 31和 1998 0 7 0 5两场典型降雨径流量和侵蚀量的模型检验显示 ,模拟误差分别为 - 3 2 4 %、+10 %和 +32 3%、+39 34%。
Based on field investigation of the land use, erosion distribution of an experimental forest catchment exposed to eight typical events of rainfall from 1996 to 1998 was modeled with the aid of the GIS and a number of models, which cover canopy interception, roughness of litters, SCS hydrology, sediment calculation and transferring rate of runoff plot. The results show that the event sediment of bare lands and water resource protection forest accounts for 92.47%～100% and 15.23%～7.53% of the total erosion sedimentation, respectively. Verification of the models based on the two typical events of 1997-07-31 and 1998-07-05 indicates the error of simulated runoff discharge and sediment were -3.24%, +10% and +32.3%, +39.34%, respectively.
出处
《土壤学报》
CAS
CSCD
北大核心
2004年第6期864-869,共6页
Acta Pedologica Sinica
基金
国家自然科学重点基金项目 (基金编号 :5 0 2 3 90 80 1 3 )
面上基金 (基金编号 :40 2 0 10 3 2 )资助
