【摘要】 借助大量观测资料 ,分析研究了不同森林类型、不同土地利用状况以及不同尺度下 ,森林生态系统对非点源污染的调控作用。研究表明 ,森林对非点源污染的调控能力较强 ,坡面森林可使固体污染物减少 6 0 %以上 ,林地的营养元素损失减少 30 %～ 5 0 %。对于不同尺度下的流域 ,森林覆盖率高的流域水质参数指标大多低于森林覆盖率低的流域 ,尤其是NH+4 ,从坡央小流域到大流域急剧下降。被采伐过的流域的水温上升 0 .2～ 0 .4℃ ,N损失量从 4km/hm2 ·a上升到 142kg/hm2 ·a。更多还原

【Abstract】 Abundant data were used to analysed the adjusting and controlling ability of forestry ecological system over the non-point pollution under different conditions of forest type, land utilization and scales. The research showed that forest pocesses considerable adjusting and controlling ability over the non-point pollution. Hillside forest can reduce 60% of solid pollutant and avoid the loss of nutrient up to 30%～50%. The parameters of water quality for the area with high coverage of forest is much lower than these with low coverage of forest. Water temperature in the drainage area where the forest has been logged increases 0.2～0.4 ℃ and the loss of N ranges from 4 kg/hm 2·a to 142 kg/hm 2·a.更多还原