| 引用本文: | 何伟,商景阁,周麒麟,程南宁,范成新.淀山湖底泥生态疏浚适宜深度判定分析.湖泊科学,2013,25(4):471-477. DOI:10.18307/2013.0403 |
| HE Wei,SHANG Jingge,ZHOU Qilin,CHENG Nanning,FAN Chengxin.Determination of appropriate-ecological sediment dredging depth in Lake Dianshan,China. J. Lake Sci.2013,25(4):471-477. DOI:10.18307/2013.0403 |
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| 淀山湖底泥生态疏浚适宜深度判定分析 |
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何伟1,2,3, 商景阁1,3, 周麒麟1,3, 程南宁2, 范成新1
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1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.上海勘测设计研究院, 上海 200434;3.中国科学院大学, 北京 100049
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| 摘要: |
| 通过室内模拟实验,对淀山湖东部湖区的沉积物进行研究,测定沉积物在不同疏浚深度和疏浚温度下的铵态氮(NH4+-N)、正磷酸盐(NH43--P)和溶解性有机碳(DOC)的释放速率,并对该区域沉积物的理化指标进行检测.结果表明:淀山湖表层沉积物近年来总磷和有机质含量有较大增加.淀山湖东部湖区NH4+-N和DOC存在着释放趋势,NH43--P在夏季会从沉积物中向上覆水中释放,在年内会形成"源"和"汇"的转化.整个淀山湖东部湖区按不同研究区域划分,疏浚深度以10~20 cm最佳,疏浚季节以秋季为佳.通过对淀山湖东部湖区的沉积物在不同疏浚深度和疏浚时间下的污染物释放速率的研究,可以为淀山湖和其它类似湖泊的疏浚工作提供相应的科学依据. |
| 关键词: 底泥疏浚 释放速率 疏浚深度 疏浚温度 淀山湖 |
| DOI：10.18307/2013.0403 |
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| 基金项目:中国科学院知识创新工程重要方向性项目(KZCX2-EW-314);江苏省产学研项目(BY2011165);中国科学院南京地理与湖泊研究所科研启动项目(NIGLAS2011QD09)联合资助 |
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| Determination of appropriate-ecological sediment dredging depth in Lake Dianshan,China |
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HE Wei1,2,3, SHANG Jingge1,3, ZHOU Qilin1,3, CHENG Nanning2, FAN Chengxin1
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1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;2.Shanghai Investigation, Design and Research Institute, Shanghai 200434, P.R.China;3.University of Chinese Academy of Sciences, Beijing 100049, P.R.China
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| Abstract: |
| Based on the simulated experiment in laboratory,physicochemical characteristics of sediment in eastern Lake Dianshan were measured,and release rates of ammonia,orthophosphate and dissolved organic carbon were measured under different simulated dredging depths and temperatures.The results were shown as follow: total phosphate and organic matter in surface layer of sediment increased several times during recent years in the eastern Lake Dianshan.The release flux direction of ammonia and dissolved organic carbon were from sediment to water column in the whole year,comparing to the reverse release flux direction of orthophosphate, except in summer.The role of sediment in phosphate cycle changed between "pool" and "source" in different seasons.The best dredging depth was 10 20 cm in the research area,and the best dredging season was autumn.The results provide information for the decision of dredging parameters in the practice of dredging project. |
| Key words: Sediment dredging release rates dredging depth dredging temperature Lake Dianshan |
