双龙湖底泥氮释放强度影响因素正交试验研究

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的主要负荷。研究双龙湖限制性营养元素——氮在底泥的释放规律,对修复水体、保持水质具有重要意义,为湖泊内源治理、水环境保持提供科学依据。本文试验分析双龙湖环境因子(温度、pH值、溶解氧、水动力)对底泥总氮释放的影响;通过底泥正交模拟试验测定分析认为温度、溶解氧、pH值、水动力均是影响双龙湖底泥氮释放的显著因素,显著性排序依次为温度>溶解氧>pH值>水动力。

Study on orthogonal experiment for the affecting factors of nitrogen releasing from sediment in Shuanglong Lake

Shuanglong Lake was a shallow Lake in the urban city that had been a serious tipical eutrophic Lake.After comprehensive harnessing the outside pollution had been effectively controlled,the endogenous pollution which was caused by polluted sediment would be become main nutritional load.As for this,it was important to ascertain the releasing regularity of nitrogen which was the restrict nutrient of the Lake,to rehabilitate and maintain water quality,and to provide the scientific foundation for harnessing the Lake's endogenesis pollutes and protecting the enviroment.The effects of marked environmental factors(Temperature,DO,pH and water dynamic) on the release of nitrogen have been analyzed in the laboratory,the result shown temperature,DO,pH and water dynamic total were the remarkable affecting factors in Nitrogen Releasing by the orthogonal experiment,the order of marked factors was Temperature>DO>pH>water dynamic.