| 长江口水体表层悬浮泥沙时空分布对环境演变的响应 |
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| 引用本文： | 陈勇,韩震,杨丽君,徐俊杰,刘曦.长江口水体表层悬浮泥沙时空分布对环境演变的响应[J].海洋学报,2012,34(1):145-152. |
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| 作者姓名： | 陈勇 韩震 杨丽君 徐俊杰 刘曦 |
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| 作者单位： | 1.上海市地质调查研究院, 上海 200072 |
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| 基金项目： | 上海市科学技术委员会计划项目"海岸带地质环境对城市安全影响监测体系研究"(09231203300);上海市规划和国土资源管理局项目"上海市后备土地资源动态监测体系与应用研究"(Gtz20090012)。 |
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| 摘 要： | 基于1974-2009年15个时相的陆地卫星影像,采用Gordon模型在长江口地区开展了悬浮泥沙浓度反演研究。对反演结果的时空分布规律分析表明:近40 a来长江口悬浮泥沙浓度最大下降幅度达40%;悬浮泥沙浓度演化规律与长江口来沙量变化规律具有较好的相关性;曲线拐点与2003年的长江截流、2006年三峡水库蓄水等重大工程事件吻合良好。在忽略波浪、地形等影响因素的情况下,在长时间跨度范围内,遥感技术反演的长江口悬浮泥沙浓度对长江流域环境变迁与人类水利工程活动响应敏感,较好的揭示了环境的变迁。
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| 关 键 词： | 遥感 长江口 悬浮泥沙浓度 |
| 收稿时间： | 1/6/2011 12:00:00 AM |
| 修稿时间： | 2011/6/27 0:00:00 |
The spatial and temporal distribution of suspended sediment concentration and its response to environmental change in the Changjiang Estuary |
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| CHEN Yong,HAN Zhen,YANG Lijun,XU Junjie and LIU Xi.The spatial and temporal distribution of suspended sediment concentration and its response to environmental change in the Changjiang Estuary[J].Acta Oceanologica Sinica (in Chinese),2012,34(1):145-152. |
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| Authors: | CHEN Yong HAN Zhen YANG Lijun XU Junjie and LIU Xi |
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| Affiliation: | 1.Shanghai Institute of Geological Survey, Shanghai 200072, China2.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China |
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| Abstract: | Fifteen suspended sediment concentrations(SSC) resulting images are retrieved from Landsat images using Gordon formulation in the Changjiang Estuary in China.Base upon these results, a spatial and temporal analysis has been conducted with the findings as following: the SSC in the Changjiang Estuary decrease significantly by nearly 40% over the past 40 a; their variation curves show high similarity with curve of decrease in riverine sediment supply, which is deduced by a geological environment change and big hydraulic engineering projects, that is to say, to some extent, the SSC maps retrieved from remote sensing images can suggest the geological environment change in the long time scale, as well as the dramatical variation caused by human being engineering activities in short time scale.Although the retrieve work ignores the influentical factors such as topography and tide, it represents high sensibility in response to the decrease of sediment supply. |
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| Keywords: | remote sensing Changjiang Estuary in China suspended sediment concentration |
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