洋河水库富营养化限制性因子分析

以洋河水库2001~2005年的监测资料为基础,运用回归统计方法,选择水温等8项环境理化指标与藻类叶绿素a进行回归分析。结果显示,总磷、水温、pH值和透明度与藻类叶绿素a呈显著相关,其中总磷和水温是洋河水库富营养化限制性因子。根据2003~2005年水库监测资料,建立多元逐步回归方程,预测水库藻类叶绿素a的变化情况。运用该回归方程,计算水库2001~2002年藻类叶绿素a变化情况并与实测值作比较,结果表明,该方程能基本预测洋河水库藻类叶绿素a的变化趋势。

Limiting factors of eutrophication in Yanghe Reservoir

Regression statistical method was used to analyze the relation between chlorophyll-a of alga and eight environmental factors such as water temperature(T) based on the monitoring data in Yanghe Reservoir from 2001 to 2005.The results showed that water temperature(T),total phosphorus(TP),pH and secchi depth(SD) were significantly related factors to algal chlorophyll-a,and TP and water temperature were the limiting factors of eutrophication in Yanghe Reservoir. A stepwise multi-regression statistical model based on the monitoring data from 2003 to 2005 was established to predict the algal chlorophyll-a in Yanghe Reservoir,and the calculated results were compared with monitoring data.The results showed that the model can be used to predict the algal chlorophyll-a in Yanghe Reservoir.