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基于遥感和GIS的湿地生态资产定量研究 【作者】焦彩霞 【导师】黄家柱

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基于遥感GIS湿地生态资产定量研究

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k rx,S;Sp#]0【作者】焦彩霞导师黄家柱水利论文pk I:?$u/{j^Ut
【作者基本信息】南京师范大学,地图学与地理信息系统,2006年,博士

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【中文摘要】 湿地是介于水生生态系统和陆生生态系统之间的一种特殊的生态系统,是自然界最富生物多样性的生态景观和人类最重要的生存环境之一。因具有巨大的水文和元素循环功能,湿地被誉为“地球之肾”。随着人类认识程度的不断提高,湿地对于生态环境的特殊性和重要性受到全世界的极大关注,湿地生态资产作为湿地研究的主要方向已成为当前国际上的热点研究领域。 本研究在系统总结和分析国内外湿地生态资产研究现状的基础上,确立湿地生态资产评估指标体系,采用物质量和价值量相结合的方法,建立基于遥感和地理信息系统的湿地生态资产评估模型,并据此对1988~2002年江苏省里下河洼地宝应县湿地生态资产的价值变化进行案例分析,进行实证研究。 论文的主要研究成果包括: (1)确立了生态资产评估指标体系,主要包括涵养水源、调蓄洪水、气体调节、水质净化、控制侵蚀保护土壤、营养循环等6个方面。 (2)综合国内外生态资产评估模型,采用物质量和价值量相结合的方法,构建基于遥感和GIS的湿地生态资产评估模型及各指标的子模型。 (3)根据湿地分类原则,采用1988年和2002年两期TM遥感影像,对宝应县湿地进行监督分类,并从总量变化、转移矩阵以及景观...更多空间格局三个方面对宝应县湿地动态变化进行分析。 (4)根据湿地生态资产评估模型,对宝应县1988年和2002湿地生态资产进行计算并研究其动态变化趋势。结果表明,14年来湿地生态资产略有增加,其中气体调节功能的贡献率最大。 本论文的主要创新点体现在以下2个方面: (1)采用物质量与价值量相结合的方法,构建了基于遥感与地理信息系统的湿地生态资产评估模型。 (2)根据湿地生态资产评估模型,对宝应县湿地生态资产动态变化进行了分析。 湿地生态资产评估模型充分体现了生态资产的时空动态变化特征,是湿地生态资产研究的一个较完整的总结,其缺点在于模型中没有考虑到释放CH4和N2O等温室气体引起的负  还原

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【英文摘要】 Wetland is a natural body existing between water and land as a transitional conformation, which has the richest biodiversity in nature, and is one of the most important surviving environment of human being. It is called as "Kidney of earth" because it has tremendous function of water and element cycle. Along with the improvement of human knowledge, people give their attention to wetland study because of the distinctiveness and significance for ecological environment. At present, wetland ecological assets, as one important study of wetland research, have become currently international hot research area.On the basis of systematic analyses and summarization of the previous and present research, the index system of the wetland ecological assets is established and models for their valuation is builded upon RS and GIS using the physical and value assessment methods. Based on TM image data in 1988 and 2002, wetland ecological assets of Baoying are calculated and the changes of their valuation...更多 are also studied.The main conclusion on this research:(1) The index system of the wetland ecological assets is established, which include water holding, water regulation, adjusting atmosphere component, water quality decontamination, soil conservation and nutrient cycling.(2) Using the physical and value assessment methods, models of the wetland ecological assets is builded upon RS and GIS.(3) Base on the wetland principle of classification, using TM image data in 1988 and 2002, this paper performs supervised classification of Baoying wetland and analyzes the dynamic change in the past 14 years.(4) Using the models of wetland ecological assets, this paper calculates their valuation of Baoying in 1988 and 2002 and analyses the trend of dynamic change. The conclusion is drawn as follows: in the past 14 years, the wetland ecological assets increase on the small side and the contribution of adjusting atmosphere component is the largest.The innovation what is stressing research in this paper:(1) Using the physical and value assessment methods, this paper builds models of wetland  还原

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【中文关键词】 湿地; 生态资产; 宝应县
-g9BlN-eZ0【英文关键词】 wetland; ecological assets; Baoying county水利论文k5U GJ4lef H
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TAG: GIS 湿地 遥感 黄家柱 焦彩霞
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