| 平原河网地区水质与土地利用格局关系 |
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| 引用本文： | 张殷俊,陈 爽,彭立华.平原河网地区水质与土地利用格局关系[J].资源科学,2009,31(12):2150-2156. |
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| 作者姓名： | 张殷俊 陈 爽 彭立华 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所，南京 210008;中国科学院南京地理与湖泊研究所，南京 210008;香港大学地理学系，香港 |
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| 基金项目： | 中国科学院知识创新重要方向项目（编号: KZCY2-YW-339）；国家自然科学基金项目（编号: 40601098）。 |
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| 摘 要： | 通过划分不同类型和尺度的作用区，利用吴江市2005年的土地利用数据和29个水质监测点的溶解氧、高锰酸盐指数和氨氮数据，分析不同作用区内土地利用格局与水质指数之间的相关关系。研究结果表明，吴江地区土地利用格局对水质有重要影响。城市建设用地与溶解氧之间存在显著负相关，与高锰酸盐指数和氨氮之间存在显著正相关；园林地同高锰酸盐指数和氨氮在所有尺度带状作用区和部分尺度的圆形作用区上存在显著负相关；耕地同溶解氧在圆形和带状部分尺度作用区上呈显著正相关。说明城市建设用地的扩张对吴江市水质指标（溶解氧、高锰酸盐指数和氨氮）有负面影响，而耕地和园林地则会对水质起到一定程度的正面影响。多用地类型与水质的偏相关分析证实了不同用地类型的尺度效应，近距离分布的耕地有利于水质改善，而城镇建设用地对水质影响在较大尺度上更为显著。研究成果可为经济发达的太湖流域空间开发与水环境保护协调政策制定提供科学依据，并为同类研究提供借鉴。
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| 关 键 词： | 平原河网 土地利用 水质 相关分析 吴江 |
Relationships between Land Use Pattern and Surface Water Quality in the Plain River Network Area |
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| ZHANG Yinjun,CHEN Shuang and PENG Lihua.Relationships between Land Use Pattern and Surface Water Quality in the Plain River Network Area[J].Resources Science,2009,31(12):2150-2156. |
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| Authors: | ZHANG Yinjun CHEN Shuang and PENG Lihua |
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| Abstract: | Human activities being characterized by land use are primary sources of water pollution, such as agriculture, resident, industry. The type, size and distance of different land use types to water bodies are usually studied in a manner relating them to water quality. The authors performed a preliminary study on exploring the relationship between land use and water quality in Wujiang, a county-level city with the typical river net plain in the Taihu Lake catchment. In the study area 29 monitoring sites for water quality assessment were distributed and utilized. Based on GIS spatial analysis, strip and round types of contributing zones were developed around these sites, and the proportions of five types of land use types were extracted from buffer zones with radii ranging from 100 m to 2000 m. On the basis of three water quality variables including CODMn, NH3-N and DO, the correlation relationship between water quality and land use pattern over different contributing zones was examined. Results showed that the land use patterns in Wujiang had great impacts on surface water quality. Also, the land for urban construction exhibited a significant positive relation with CODMn and NH3-N, but a negative relation with DO. The forestland negatively correlated with CODMn and NH3-N for all strip buffers and some of round buffers. Also, there existed a positive correlation between cultivated land and DO in part of scales of round and strip contributing zones. It was suggested that the expansion of urban construction land leaded to negative effects on water quality of Wujiang city. Nevertheless, the cultivated land and forestland showed positive effects to some extent. Furthermore, partial correlation analysis results demonstrated that the dominant role of the land for urban construction in affecting water quality. This meant that the urban non-point pollution could be a major factor degrading water quality compared to other sources, like agricultural non-point pollution. Third, statistical analysis suggested the scale effect caused by different land use types. The closer cultivated land was suitable for improvement to water quality. The construction land brought more impacts on water quality at scales larger than 500 m. The study would be greatly helpful for land use planning and regional development policy making, progressively addressing water environmental problems in the Taihu Lake catchment. |
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| Keywords: | River Network Plain Land use Water quality Correlation analysis Wujiang |
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