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Land Use/Cover and Surface Water Quality at Multiple Spatial Scales in the Kanto Region
http://hdl.handle.net/2261/37240
http://hdl.handle.net/2261/37240ec4b9a61-e79c-4543-bae5-694f3fca4cdf
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Item type | 学位論文 / Thesis or Dissertation(1) | |||||
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公開日 | 2012-10-12 | |||||
タイトル | ||||||
タイトル | Land Use/Cover and Surface Water Quality at Multiple Spatial Scales in the Kanto Region | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | Land use/cover | |||||
主題Scheme | Other | |||||
キーワード | ||||||
主題 | Water quality | |||||
主題Scheme | Other | |||||
キーワード | ||||||
主題 | Kanto region | |||||
主題Scheme | Other | |||||
キーワード | ||||||
主題 | River basin | |||||
主題Scheme | Other | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_46ec | |||||
タイプ | thesis | |||||
著者 |
DARMAWAN, Andy
× DARMAWAN, Andy |
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著者別名 | ||||||
識別子 | 9228 | |||||
識別子Scheme | WEKO | |||||
姓名 | ダマワン, アンディ | |||||
著者所属 | ||||||
著者所属 | 東京大学大学院新領域創成科学研究科環境学研究系サステイナビリティ学教育プログラム | |||||
Abstract | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Previous research has shown that water quality in a river basin is affected by its land use/cover. However, more research is needed because findings so far vary from one river basin to another. This research assesses relationships between land use/cover and water quality in river basins of the Kanto region, Japan.<改行> First, land use/cover changes during 1983–1986, 1989–1992, and 1995–1999 were analyzed. It was found that the changes were decreased in number with time, but increased in average size. Their spatial distribution also extended from urban and agricultural areas to forest in the upper reaches. A larger percentage of forest was converted into land constructed for residence/factories and cultivated meadows. Agricultural areas including paddy fields were also converted, especially into land constructed for residence/factories.<改行> Second, temporal trends of water quality were analyzed. The results show overall improvement of water quality in most river basins since the 1970s, which can be attributed to the enforcement of the Environmental Pollution Prevention Law. However, degradation of water quality due to nutrient concentration was observed in some river basins. Spatially, lower water quality occurs in areas dominated by urban and agricultural land use/covers. Therefore, pollution controls applied to these areas will improve water quality.<改行> Correlation and multiple regression analyses indicate that, for the spatial scale of the whole Kanto region, water quality is mainly related to percentages of factory/industrial areas, those of urban districts with a few trees, and those of urban/residential districts with many trees. This indicates that despite the presences of sewage systems and wastewater treatment plants, anthropogenic activities associated with land use/cover remain affecting water quality. Weed communities including those on the roadside and in both cultivated and uncultivated paddy fields play a significant role in determining water quality in the spatial scale of river basins. This suggests that resuming agriculture in areas with unmanaged weed communities will improve water quality.<改行> Altering spatial scales used in the correlation analysis of land use/cover and water quality including multiple regression led to different results. This indicates the importance of spatial scales in analyzing relationships between land use/cover and water quality. Therefore, plannings of sustainable development should consider the use of multiple spatial scale approaches to protect water quality in an appropriate manner. | |||||
書誌情報 | 発行日 2010-03-24 | |||||
学位名 | ||||||
学位名 | 修士(サステイナビリティ学) | |||||
学位 | ||||||
値 | master | |||||
研究科・専攻 | ||||||
新領域創成科学研究科サステイナビリティ学教育プログラム | ||||||
学位授与年月日 | ||||||
学位授与年月日 | 2010-03-24 | |||||
学位記番号 | ||||||
修創域第3432号 |