摘要
在地理信息系统软件ARC／INFD支持下，构造了土壤侵蚀及搬运的非点源污染分布式参数模型．以广东省大亚湾经济技术开发区为例，对模型参数（地形因子T）作灵敏度分析，计算T时考虑了各种不规则地形的影响．根据50，100，200m栅格大小计算的T分布差异较大．结合野外实验，最后确定50m栅格大小为最优，能表征精确的T值．
An integrated approach coupling distributed parameter model with GIS was advanced to examine nonpoint source (NPS) pollution in a coastal development sone. GIS-based pollutant export model was developed to estimate soil erosion and sediment yield. Model parameters can be derived from each grid Cell ddirectly from maps using GIS solution. In addition, computation of parameter T for the NPS model should take irregular slope shapes into account. Cell size evolution, if arbitrarily determining, could yield ambiguous results. The effects of Cell size selection through a sensitivity analysis of T was investigated. Among 50, 100,200m of cell size, 50m can represent the most precise spatial variability of T.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
1997年第2期281-284,共4页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金!49371058
关键词
地理信息系统
非点源污染
地形因子
土地利用
GIS
nonpoint source pollution
topographic factor
slope shape
Cell size
