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为了揭示大型浅水湖泊沉积物的再悬浮强度,利用高精度分层同步采样技术,进行了太湖的悬浮物垂向分布的原位观测.结果表明,在无风浪状态下,用表层悬浮物浓度计算整个水柱的悬浮物总量时,其结果常常为实际值的80%~85%;而在风浪状态,底层水体悬浮物浓度与表层有数量级的差异,用表层悬浮物浓度计算整个水柱的悬浮物总量时,误差更大,其结果多为实际值的50%.一般条件下,风浪扰动沉积物再悬浮的厚度较小,为毫米量级.
In order to reveal the resuspension strength of sediments in large shallow lakes, the vertical distribution of suspended matter in Taihu Lake was observed in situ using high-precision stratified synchronous sampling technique.The results show that in the condition of no wind and waves, The total amount of suspended solids in the entire water column, the results are often the actual value of 80% to 85%; and in the wind and waves state, the bottom of the suspended matter concentration and the surface layer of order of magnitude difference between the surface suspended solids concentration calculation of the entire water column suspended solids When the total amount is larger, the error is larger, and the result is mostly 50% of the actual value. Under normal conditions, the thickness of resuspended sediment of wind-wave disturbance is small, in the order of millimeters.