作　　者： ; ; ; ; ; ; ; (吕俊）;

机构地区： 河海大学环境科学与工程学院

出　　处： 《湖泊科学》 2004年第4期318-324,共7页

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. 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 different 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.

关 键 词： 底泥 磷释放 释放通量 水体 太湖 上覆水 水动力条件 流速 水槽

领　　域： [环境科学与工程] [环境科学与工程]