苍南海域疏浚物倾倒悬浮物扩散特征现场试验分析  

Probing on the dispersion character of dredged material after dumping in sea area around Cangnan

作　　者：何东海[1] 何琴燕[1] 吴光荣[1] 江再寿[1] 洪元旦[1] 

机构地区：[1]国家海洋局宁波海洋环境监测中心站,浙江宁波315012

出　　处：《海洋工程》2013年第3期101-106,共6页The Ocean Engineering

基　　金：海洋公益性行业科研专项经费资助项目(201105010-14)

摘　　要：通过海上倾倒试验,了解疏浚物倾倒在苍南海域的悬浮物扩散特征。试验结果表明:1)疏浚物粒径特征值为倾倒点水体中悬浮物特征值的1.3～2.7倍,倾倒试验过程中水体中悬浮物粒径值的变化较好地体现了疏浚物在水体中的沉降过程;2)由倾倒引起的悬浮物浓度增加而形成的云团在15～30 min后漂离倾倒点,30～60 min后,云团基本消失,且由倾倒引起的悬浮物增量效应也基本结束;3)倾倒云团在顺流方向距倾倒点0.3～0.4 km处,表层水体悬浮物增量影响不明显,疏浚物倾倒造成水体悬浮物浓度增高的影响在顺流方向1.5 km左右基本结束。The researchers of this paper wanted to know the dispersion character of dredged material after a dumping test in the sea area around Cangnan.The results indicated：（1）The grain size of dredged material was 1.3~2.7 times as that of suspended matter in the dumping spot.The change of grain size ideally showed the sedimentation course of dumping material in seawater.（2）The suspended matter in seawater,because of dumping activity,left from the dumping spot in 15~30 min,and the effects of suspended matter concentration in seawater disappeared in 30~60 min after dumping activity.（3） The suspended matter concentration of the cloud in surface seawater was not significantly different from that of the dumping spot,which was 0.3~0.4 km from the dumping spot in the orientation of ocean current,and the influence of suspended matter concentration of the cloud in seawater disappeared after the cloud was drifted to the distance 1.5 km from the dumping spot in the orientation of ocean current.

关 键 词：疏浚物倾倒 悬浮物 扩散特征 苍南海域 

分 类 号：TV148[水利工程—水力学及河流动力学]