摘要
"以点代面"在环境现状评价中应用较为普遍,由于点的位置、区域面积大小及形状等原因,(监测)点值很难代表区域平均水平.将地理信息系统(GIS)的空间插值技术应用于评价中,可以改善结果的合理性及可解释性.通过对各插值方法进行选择后选取反距离加权法与Kriging法对长湖的污染现状进行分析,得出大部分水域水质都处于Ⅴ类和劣Ⅴ类,只是在其主要出水口习家口和刘岑闸附近的小部分水域水质可以达到Ⅳ水质标准.同时发现反距离加权法与Kriging法都具有较高的精度,只是Kriging法略优于反距离加权法.
Object-point replacing surface is a general method used environmental assessment. However, points （such as monitoring point） value sometimes might not present average level very well because of the area size, shape, and etc. The Geographic Information System （GIS） spatial interpolation technology was applide in the assessment therefore to make the results more rational and explicable. After practicing all kinds of spatial interpolation methods, two ways we selected ： Inverse distance to a power method and Kriging to analyze the water quality of Changhu Lake. Results show that most of the water in the lake was of Grade Ⅴ or even worse. Only in the main outlet Xijiakou and Liuling flood gate ,the little part of the water achieved Grade Ⅳ. Kriging was superior to Inverse Distance to a Power Method.Brigs., ltab., 9refs.
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2007年第3期125-128,共4页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
国家自然科学基金项目(30671818)
关键词
空间插值
长湖
水质
评价
spatial interpolation
Changhu lake
water quality
assessment
