湖泊底泥释磷模型及其影响显著因素试验研究  

Model and Research of Phosphorus Releasing from Sediment of Lakes

作　　者：张智[1] 刘亚丽[1] 段秀举[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点试验室,重庆400045

出　　处：《农业环境科学学报》2007年第1期45-50,共6页Journal of Agro-Environment Science

基　　金：国家自然科学基金项目(50178070);博士点基金项目(20010611020)

摘　　要：双龙湖是浅水型城市湖泊,一度为重富营养化湖泊,经综合治理其外源污染得到有效控制后,内源污染可能成为湖泊营养物主要负荷。为研究释磷模型预测不同环境条件下底泥释磷规律,进而采取适宜措施抑制磷释放,通过底泥正交模拟试验测定分析方法,考察了环境因子(温度、pH值、溶解氧、水动力)对湖泊底泥中磷释放的影响。结果表明,温度、溶解氧、pH值、水动力均是影响双龙湖底泥磷释放的显著因素,各因素水平间有显著差异,影响因素显著性排序从大到小依次为溶解氧、温度、pH值、水动力。用多元回归得出双龙湖底泥平均释磷强度模型:R=0.396+0.0184[T]+0.0589[pH]-0.176[DO]+0.122[K]。Shuanglong Lake is a shallow lake in the urban city, once a serious typical eutrophication lake. After comprehensive harnessing, the external pollution had been controlled; the endogenous pollution caused by polluted sediment may become the main nutritional loading in Shuanglong Lake. The effects of environmental factors, including temperature, dissolvable oxygen, pH and hydrodynamic, on phosphorus releasing were analyzed. Temperature, DO, pH and hydrodynamic all remarkably affected the phosphorus releasing based on the orthogonal experiment, with the order DO〉temperature〉pH〉hydrodynamic; and there existed significant differences among different levels of the factors. So, it was an effective measure to reduce the phosphorus in sediment by improving the dissolvable oxygen level in the lake. The average phosphorns releasing in sediment of Shuanglong Lake followed the equation： R=0.396＋0.0184[T]＋0.0589[pH]-0.176[DO]＋0.122[K]. Using the model, phosphorus releasing in polluted sediment can be estimated and controlled by synthesizing treatment.

关 键 词：双龙湖 富营养化 内源污染 底泥 释磷 模型 

分 类 号：X703[环境科学与工程—环境工程]