摘要
数学模型是进行植被过滤带(VFS)设计的重要工具。本研究通过分析植被过滤带对径流中悬浮固体的净化机理,采用植被过滤带田间尺度机理模型VFSMOD和修正的土壤侵蚀模型MUSLE耦合,对植被过滤带的悬浮固体净化效果进行模拟,并利用野外小区试验数据对该耦合模型进行了验证。结果表明,植被过滤带出流悬浮固体浓度模拟值与实测值的偏差多在±20%以内,其模拟值与实测值的判定系数R2为0.98,该模型具有较高的精度,且优于VFSMOD模型,可用于我国植被过滤带的规划设计。
Mathematical model is an important tool for the planning and design of vegetative filter strips（VFS）.Through the analysis on the purification mechanisms of VFS to suspended solids in surface runoff,a mathematical model which coupled the field scale mechanism model VFSMOD and the revised soil erosion model MUSLE was designed to simulate the purification effect of VFS on the suspended solids in surface runoff.The applicability and performance ability of this coupling model were validated by field plot experiment.The results showed that the relative deviations between the simulated and measured values of the concentrations of suspended solids were within ±20%,and the determination coefficients between the simulated and measured values were 0.98,suggesting that this coupling model had a high precision and was superior to VFSMOD model,being able to be used as a tool for the planning and design of VFS in China.
出处
《生态学杂志》
CAS
CSCD
北大核心
2012年第11期2976-2980,共5页
Chinese Journal of Ecology
基金
国家自然科学基金项目(50979090)
国家水体污染控制与治理科技重大专项(2009ZX07212-002-004-002)资助
