模拟水力调度条件下磁湖底泥的释磷规律  

Regularity of Phosphorus Release from Sediments of Cihu Lake under Conditions of Simulated Hydraulic Dispatching

作　　者：吴清林[1,2] 武长城[3] 董惠芳[4] 肖文胜[1,5] 王弘宇[1] 鲁梅[1] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072 [2]武汉大学设计研究总院,湖北武汉430072 [3]中冶南方工程技术有限公司,湖北武汉430223 [4]河北建筑工程学院机械工程系,河北张家口075024 [5]黄石理工学院环境科学与工程学院,湖北黄石435003

出　　处：《中国给水排水》2009年第17期91-93,96,共4页China Water & Wastewater

基　　金：湖北省自然科学基金资助项目(2007ABA242);湖北省高等学校优秀中青年科技创新团队项目(T200709)

摘　　要：在实验室条件下模拟引调长江水稀释磁湖水,考察了稀释后磁湖底泥的释磷规律。结果表明,当湖水和长江水按1∶4(体积比)混合作为上覆水时,磁湖的表层底泥表现为先吸磷后释磷,至试验后期,与原湖水相比,除个别泥样上覆水的SRP和TP浓度略微降低外,大部分泥样上覆水的SRP和TP浓度均有一定程度的升高,说明在引水稀释条件下磁湖底泥的内源磷释放特征明显。对不同深度底泥释磷的研究表明,至试验后期,深度>30 cm的底泥的释磷量较上层底泥显著减小,30 cm可作为磁湖底泥的疏浚深度。The regularity of phosphorus release from diluted sediments of Cihu Lake was investigated through the simulated test of diluting Cihu Lake water by Yangtze River water in the laboratory. The results show that when the mixed water of the lake water and Yangtze River water with the proportion of 1 ： 4 is used as the overlying water, the surface sediments adsorb the phosphorus, then release the phosphorus. During the late trial, compared with the original lake water, the SRP and TP concentrations of overlying water of the other sediment samples all increase, except that those of the minority of sediment samples are reduced. It indicates that the internal phosphorus in sediments of Cihu Lake releases evidently under the condition of being diluted. The study on phosphorus release from sediments at different depths shows that the amount of phosphorus release er than that from sediment at the depth of less than ging depth. Key words： Cihu Lake ; phosphorus release from sediment at the depth of more than 30cm is lower than that from sediment at the depth of less than 30 cm, and the 30 cm depth can be used as the dredging depth.

关 键 词：磁湖 水力调度 疏浚 上覆水 底泥 释磷 

分 类 号：X524[环境科学与工程—环境工程]