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再悬浮底泥污染物在水体中的分层释放特征

期刊名称：水动力学研究与进展
时间：2014
页码：592-598
分类：X831[环境科学与工程—环境工程] P512.2[天文地球—地质学]
作者机构：[1]Shanghai Academy of Environmental Sciences, Shanghai 201200, China, [2]Institute of Applied Mathematics and Mechanics and Shanghai Key Laboratory-of/Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, China, [3]School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
相关基金：Project supported by the National Natural Science Foun- dation of China （Grant Nos. 11032007, 11472168）, the Techno- logy Innovation Foundation of Institute （Grant No. CX201408） and the Science and Technology Commission of Shanghai （Grant No. 15DZ1205604）, Shanghai Municipal Oceanic Bureau （Grant No. Huhaike 2014-01）.
相关项目：复杂水动力条件下水体-泥沙-污染物的动态耦合环境效应

关键词：释放通量, 湖泊沉积物, 原位, 沉积物-水界面, 浅水, 养分, 溶解态磷, 表层沉积物, shallow lake, wind-induced wave, hydraulic disturbance, nutrient fluxes, in-situ experiment

中文摘要：

An in-situ benthic device to measure nutrient fluxes across the sediment-water interface has been developed and successfully used to study both static and dynamic fluxes of nutrients in Dianshan Lake, China. The result shows that the surface sediments of Dianshan Lake were resuspended under wind-driven waves. DOC entered into overlying water only when sediments were resuspended. The average DOC flux was 105.78 mg/(m~2d), while the static and dynamic POC fluxes were 48.22 mg/(m~2d) and 10 273.20 mg/(m~2d), respectively. Ammonia and nitrate had no significant release, and the dynamic flux of TN was 87.11 mg/(m~2d). The release of phosphorus was the most evident, and the dynamic fluxes of SRP and DTP were 20.22 mg/(m~2d) and 21.78 mg/(m~2d), 2.2 and 2.0 times higher than the static fluxes, respectively. Dissolved phosphorus was released mainly as SRP, and phosphorus release from the sediments in Dianshan Lake cannot be ignored.更多还原

英文摘要：

An in-situ benthic device to measure nutrient fluxes across the sediment-water interface has been developed and successfully used to study both static and dynamic fluxes of nutrients in Dianshan Lake, China. The result shows that the surface sediments of Dianshan Lake were resuspended under wind-driven waves. DOC entered into overlying water only when sediments were resuspended. The average DOC flux was 105.78 mg/（mEd）, while the static and dynamic POC fluxes were 48.22 mg/（mEd） and 10 273.20 mg/（m2d）, respectively. Ammonia and nitrate had no significant release, and the dynamic flux of TN was 87.11 mg/（m2d）. The release of phosphorus was the most evident, and the dynamic fluxes of SRP and DTP were 20.22 mg/（m2d） and 21.78 mg/（mEd）, 2.2 and 2.0 times higher than the static fluxes, respectively. Dissolved phosphorus was released mainly as SRP, and phosphorus release from the sediments in Dianshan Lake cannot be ignored.

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