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引用本文:翁圆,苏玉萍,张玉珍,邵凯,詹旋灿,刘怡靖,姜炳棋.福建山仔水库不同季节表层沉积物内源磷负荷分析.湖泊科学,2014,26(6):871-878. DOI:10.18307/2014.0609
WENG Yuan,SU Yuping,ZHANG Yuzhen,SHAO Kai,ZHAN Xuancan,LIU Yijing,JIANG Bingqi.Internal phosphorus loadings and fluxes of surface sediments in four seasons in Shanzi Reservoir. J. Lake Sci.2014,26(6):871-878. DOI:10.18307/2014.0609
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福建山仔水库不同季节表层沉积物内源磷负荷分析
翁圆,苏玉萍,张玉珍,邵凯,詹旋灿,刘怡靖,姜炳棋
1.福建师范大学环境科学与工程学院, 福州 350007;2.福建省环境科学研究院, 福州 350013
摘要:
对山仔水库沉积物各形态磷的季节性特征以及夏、冬季磷释放速率进行研究.结果表明,该水库表层沉积物含有较丰富的磷,4个季节各采样点表层沉积物总磷含量范围为(521.23±7.60)~(1255.54±11.03)μg/g,夏季各采样断面中总磷含量及各形态磷含量均高于其他季节.表层沉积物磷以无机磷为主,且主要赋存形态为铁/铝结合态磷.活性较大的铁/铝结合态磷和有机磷占总磷量的77%~90%.柱状样模拟实验结果表明:夏季溶解性磷释放平均速率范围在1.66~2.49mg/(m2·d),冬季溶解性磷释放平均速率范围为0.69~1.29mg/(m2·d),夏季各采样点表层沉积物磷释放速率约为冬季的2倍.由于水温分层,夏季沉积物释放的溶解性磷主要滞留在上覆层,但夏季暴雨天气可能导致水温分层破坏,沉积物释放的溶解性磷对水体将产生重要影响;冬季由于水温分层破坏导致上、下水层混合,沉积物释放的溶解性磷被带到上层,对上覆水体水质的影响不容忽视.
关键词:  沉积物    不同季节  释放速率  山仔水库  SMT法
DOI:10.18307/2014.0609
分类号:
基金项目:福建省公益类科研院所专项项目(2011R1004-2)、福建省自然科学基金项目(2014J01154)和福建师范大学2014年国家级、大学生创新创业训练计划项目联合资助
Internal phosphorus loadings and fluxes of surface sediments in four seasons in Shanzi Reservoir
WENG Yuan1, SU Yuping1,2, ZHANG Yuzhen3, SHAO Kai1, ZHAN Xuancan1, LIU Yijing3, JIANG Bingqi3
1.Environmental Science and Engineering College, Fujian Normal University, Fuzhou 350007, P.R.China;2.Fujian Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, P.R.China;3.Provincial Academy of Environmental Science, Fuzhou 350013, P.R.China
Abstract:
Spatial and temporal variations of different forms of phosphorus of the surface sediments of Shanzi Reservoir were analyzed in four seasons. The Standard Measurement and Test (SMT) and the sediment cores incubation were applied for observing the phosphorus releasing flux in the water-sediment interface. The results showed that the reservoir sediments are rich in phosphorus. The loadings of total phosphorus in surface sediments ranged from 521.23±7.60 μg/g to 1255.54±11.03 μg/g in four seasons. The amounts of total phosphorus and other phosphorus forms of all samplings were larger in summer than those in other three seasons. The inorganic phosphorus, the dominant phosphorus form in surface sediments, existed in Fe-bound phosphorus forms. The Fe-bound phosphorus and organic phosphorus occupied for 77% to 90% of the total phosphorus. The average releasing rate of dissolved phosphorus ranged from 1.66-2.49 mg/(m2·d) in summer and 0.69-1.29 mg/(m2·d) in winter. The sediment releasing of dissolved phosphorus mainly occurred in the overlying water in summer due to the water temperature stratification. Water temperature stratification may be destroyed if summer rainstorm came and the dissolved phosphorus releasing from the sediments would have a significant impact on the water quality. The water mixed together due to the water temperature stratification disappearing in winter and the dissolved phosphorus was taken to the top water layer, which could greatly affected the overlying water quality.
Key words:  Sediments  phosphorus  different seasons  releasing flux  Shanzi Reservoir  SMT
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