景观尺度湿地生态系统氮过滤能力GIS评估

发布时间：2018-05-20 22:08

本文选题：景观尺度 + 异质性　；参考：《中国科学院研究生院(东北地理与农业生态研究所)》2013年硕士论文

【摘要】：湿地是地球之肾‖，对氮、磷等污染物质具有的去除作用，近年来由于人类活动的加剧造成湿地骤减，湿地生态功能遭到严重破坏，，基于此湿地过滤功能的评估及其方法研究具有重要的理论和实际意义。针对目前湿地氮过滤功能研究多集中均质斑块难以模拟异质性斑块氮过滤功能的不足，本文以均质斑块氮去除原理为基础结合GIS水文模型，提出了景观尺度湿地生态系统氮过滤能力的评估方法。本文选取浓江河部分流域作为研究区对方法进行验证，通过对研究区1999年与2007年氮过滤功能进行评估。结果表明方法可以描述景观格局变化引起的氮过滤功能变化，可以对景观尺度下湿地氮过滤功能进行很好的评估。
[Abstract]:Wetland is the kidney of the earth. It can remove pollutants such as nitrogen and phosphorus. In recent years, due to the intensification of human activities, the wetland has been drastically reduced, and the ecological function of the wetland has been seriously damaged. It is of great theoretical and practical significance to evaluate and study the filtering function of this wetland. It is difficult to simulate the nitrogen filtration function of heterogeneous patches based on the principle of nitrogen removal from homogeneous patches and GIS hydrological model. A method for evaluating the nitrogen filtration capacity of wetland ecosystem on landscape scale was proposed. In this paper, some basins of Nongjiang River were selected as the study area to verify the method, and the nitrogen filtration function in 1999 and 2007 was evaluated. The results show that the method can describe the change of nitrogen filtration function caused by landscape pattern change, and can be used to evaluate the nitrogen filtration function of wetland in landscape scale.
【学位授予单位】：中国科学院研究生院(东北地理与农业生态研究所)
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：X171;P208

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