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引用本文:李一平,逄勇,吕俊,张刚,丁玲,彭进平,王超,范丽丽.水动力条件下底泥中氮磷释放通量.湖泊科学,2004,16(4):318-324. DOI:10.18307/2004.0405
LI Yiping,PANG Yong,LU Jun,ZHANG Gang,DING Ling,PENG Jinping,WANG Chao,FAN LiLi.On the Relation Between the Release Rate of TN, TP from Sediment and Water Velocity. J. Lake Sci.2004,16(4):318-324. DOI:10.18307/2004.0405
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水动力条件下底泥中氮磷释放通量
李一平1, 逄勇1, 吕俊2, 张刚1, 丁玲1, 彭进平1, 王超1, 范丽丽1
1.河海大学环境科学与工程学院, 南京 210098;2.广西省水文水资源局, 南宁 530023
摘要:
在环形水槽内模拟了水动力条件下底泥的起动规律,分析了底泥运动的不同状态该环形水槽内水体流速基本均匀,水槽转速与槽内水体流速能够精确的相互转换,实验中通过改变水槽转速模拟了不同扰动强度下底泥悬浮和释放的规律.以太湖底泥为例,通过上覆水中TN、TP浓度的变化,建立了底泥中TN、TP的释放通量(y)与水流(x)的关系,其表达式为TN:y=137.88e0.06x,(R2=0.94);TP:y=36.78e0.56x(R2=0.97);并将该实验结果应用在太湖的水量水质模型中,取得了比较满意的效果.
关键词:  底泥释放  水动力  环形水槽  数学模型  太湖
DOI:10.18307/2004.0405
分类号:
基金项目:国家自然科学基金(50239030)国家"863""十五"重大科技专项(2003AA6011002)江苏省自然科学基金(BK2002067)联合资助
On the Relation Between the Release Rate of TN, TP from Sediment and Water Velocity
LI Yiping1, PANG Yong1, LU Jun2, ZHANG Gang1, DING Ling1, PENG Jinping1, WANG Chao1, FAN LiLi1
1.College of Environment Science and Engineering, Hohai University, Nanjing 210098, P. R. China;2.Hydrology and Water Resources Bureaus of Guangxi proinnce, Nanning 530023, P. R. China
Abstract:
The starting principles of bottom mud in Lake Taihu were simulated in the laboratory in an annular tank;and the different stages of bottom mud movement were analyzed in this paper.The velocity of flow was basically uniformity in this annular tank, the rotation rate of tank and velocity of flow can be converted accurately, the law of sediment suspension and releasing were simulated by deferent disturbance forces.The sediments from Lake Taihu were used in this experiment, the relational expression between the release rate of TN, TP and water velocity was calculated on the basis of the relationship between the concentration of TN, TP and water velocity.The calculated result was applied in the mathematical model of water flow and water quality in Lake Taihu, and a satisfactory result was obtained.
Key words:  Release from sediment  hydrodynamic  annular tank  mathematical model  Lake Taihu
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