基于变权欧式距离模型的森林流域地表水水质评价

Evaluation of Surface Water Quality in Forest Catchment Based on Euclidean Distance Model with Varying Weights

为满足经济建设对木材及木质产品日益增长的需求,我国人工林的种植面积快速增加,其中,华南地区的桉树（Eucalyptus L’Hérit.）人工林的发展速度极快,至2008年我国桉树林面积为260万hm2[1]。桉树人工林在我国国民经济中发挥了很大的经济、社会和生态效益[2-4];然而,部分桉树种植区的居民甚至少数政府部门人员认为桉树污染水体,

The Euclidean distance model with varying weights was applied to evaluate the surface water quality based on the monitoring data derived from April 2010 to February 2011 in secondary forest catchment,eucalypt plantation catchment and rubber plantation catchment in Limu Mountain,Hainan Island.The results were compared with that of grey association analysis method,grey clustering model and fuzzy comprehensive evaluation method.The results indicated that the assessment results of surface water quality in the three types of forest catchments based on Euclidean distance model with varying weights and grey clustering model were Grade I,the assessment results of surface water quality in secondary forest catchment based on grey association analysis method and fuzzy comprehensive evaluation method were also Grade I,but besides that the assessment results of surface water quality in eucalypt plantation catchment in June 2010 and rubber plantation catchment in August 2010 based on the last two methods were Grade II,those in the remain seven months were Grade I,showing that the plantation in this area did not cause significantly negative effect on surface water.