| 越南东部近岸区域水产养殖塘分布及其对近海水体中叶绿素a质量浓度的影响 |
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| 引用本文： | 孙喆,罗菊花,杨井志成,马荣华,张丽,薛坤.越南东部近岸区域水产养殖塘分布及其对近海水体中叶绿素a质量浓度的影响[J].湿地科学,2020,18(2):207-218. |
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| 作者姓名： | 孙喆 罗菊花 杨井志成 马荣华 张丽 薛坤 |
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| 作者单位： | 中国科学院流域地理学重点实验室,中国科学院南京地理与湖泊研究所,江苏南京210008;中国科学院大学,北京100049;中国科学院流域地理学重点实验室,中国科学院南京地理与湖泊研究所,江苏南京210008;数字地球重点实验室,中国科学院空天信息创新研究院,北京100101 |
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| 基金项目： | 中国科学院战略性先导科技专项;国家重点研发计划 |
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| 摘 要： | 近岸区域水产养殖的无序化和集约化扩张会引起一系列水环境问题。利用2015年覆盖越南东部近岸区域的无云或少云的Landsat 8 OLI影像18景,采用面向对象与决策树相结合的分类方法,生产了研究区水产养殖塘空间分布数据;再利用近海水体中叶绿素a质量浓度数据,分析越南东部近岸区域水产养殖塘对近海水体中叶绿素a质量浓度的影响。研究结果表明,2015年,越南东部近岸区域水产养殖塘呈现南北多、中间少的空间分布格局,水产养殖塘总面积为8 947.29 km^2;其中,湄公河三角洲的水产养殖塘面积最大,其约占总面积的84.93%;水产养殖塘面积与近海水体中的叶绿素a质量浓度显著正相关,而且水产养殖塘面积与距离海岸线80 km范围内近海水体中的叶绿素a质量浓度关系更密切;近岸区域水产养殖塘面积对近海水体中的叶绿素a质量浓度的影响有季节差异,整体上,春季和秋季其对近海水体中的叶绿素a质量浓度的影响较大。
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| 关 键 词： | 水产养殖塘 叶绿素A 近岸区域 近海水域 越南 |
Distribution of Aquaculture Ponds in Offshore Area in East Vietnam and Its Effect on Chlorophyll-a Concentration in Coastal Water Body |
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| SUN Zhe,LUO Juhua,YANG Jingzhicheng,MA Ronghua,ZHANG Li,XUE Kun.Distribution of Aquaculture Ponds in Offshore Area in East Vietnam and Its Effect on Chlorophyll-a Concentration in Coastal Water Body[J].Wetland Science,2020,18(2):207-218. |
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| Authors: | SUN Zhe LUO Juhua YANG Jingzhicheng MA Ronghua ZHANG Li XUE Kun |
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| Institution: | (Key Laboratory of Watershed Geographic Sciences,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,Jiangsu,P.R.China;University of Chinese Academy of Sciences,Beijing 100049,P.R.China;Key Laboratory,of Digital Earth,Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100094,P.R.China) |
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| Abstract: | Rapid expansion of aquaculture ponds in offshore areas has caused a series of environmental problems. The 18 images from Landsat 8 OLI with cloudless or few cloudless covering the offshore areas in east Vietnam were collected in 2015. Then, a classification method combining object-oriented and decision trees was used to map aquaculture ponds in the study area. The relationship between area of aquaculture ponds and Chlorophyll-a concentration in the coastal water was explored. The results showed that the total area of coastal aquaculture ponds in offshore area in east Vietnam was 8 947.29 km^2 and coastal aquaculture ponds presented a non-even spatial pattern with more north and south and less middle. In all regions, the area of aquaculture ponds was the largest in Mekong River Delta, accounting for about 84.93% of the total area. It indicated that the area of aquaculture ponds was significantly positively correlated with the concentration of chlorophyll-a in offshore waters. The correlation between the area of aquaculture ponds and the chlorophyll-a concentration in the coastal water within 80 km from coastline was closer. Moreover, correlation coefficients varied with the months. Overall, the area of aquaculture ponds in offshore area had a greater impact on the chlorophyll-a concentration in the coastal water in spring and autumn, especially in October. |
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| Keywords: | aquaculture pond chlorophyll-a offshore area coastal water Vietnam |
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