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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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长江口水域悬沙浓度时空变化与泥沙再悬浮
DOI: 10.11821/xb200402012, PP. 260-266
Keywords: 悬沙浓度,时空变化,泥沙再悬浮,长江口
Abstract:
根据近年来长江河口及其邻近水域8个测站1年的表层悬沙浓度逐日观测资料，并结合水动力状况，对悬沙浓度的时空变化进行了分析。结果发现，长江口自徐六泾以下悬沙浓度不断增高，并呈现口内夏高冬低，而口外冬高夏低，且量值为口外大于口内，杭州湾大于长江口。表明长江入海泥沙在海洋动力作用下强烈再悬浮；悬沙浓度在时间上呈现明显的大小潮周期和季节性变化。进一步分析认为，海洋动力(风浪和潮流)是泥沙再悬浮的主导因素，制约悬沙浓度的年内变化，其中潮流控制悬沙浓度的大小潮周期变化，风浪引起悬沙浓度的季节性变化，河流径流和海洋动力的对比制约悬沙浓度的空间分布。
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