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| 浙江省土地利用类型与河流水质关系的空间尺度研究 |
| Study on Spatial Scale of the Relationship between Land Use Type and River Water Quality in Zhejiang |
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| DOI： |
| 中文关键词: 土地利用类型 河流水质 相关性 空间尺度 浙江省 |
| 英文关键词: Land use type River water quality Correlation Spatial scale Zhejiang |
| 基金项目:国家自然科学基金资助项目（41807495）；温州市科技计划基金资助项目（S2020001）；苏州科技大学人才启动基金资助项目（332114806） |
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| 中文摘要: |
| 以浙江省为研究区，划分不同空间尺度的圆形与河岸带缓冲区，建立多元线性回归（MLR）与地理加权回归（GWR）模型，探讨不同空间尺度下各土地利用类型对河流水质的影响。结果表明：圆形缓冲区下水质与土地利用类型的相关性高于河岸带缓冲区；pH值在500m圆形缓冲区下与草地相关性最高，溶解氧、高锰酸盐指数、总磷在1 500m圆形缓冲区下与森林相关性最高，氨氮在1 000m圆形缓冲区下与建设用地相关性最高；在圆形缓冲区下，MLR模型的R2为0132～0431，GWR模型的R2为0287～0569，均优于河岸带缓冲区。 |
| 英文摘要: |
| Taking Zhejiang as the study area， it was divided into circular and riparian buffer zones of different spatial scales. Multiple linear regression（MLR） and geographically weighted regression（GWR） models were established to explore the impact of different land use types on river water quality at different spatial scales. The results showed that the correlation between water quality and land use type in circular buffer zone was higher than that in riparian buffer zone. pH value had the highest correlation with grassland in the circular buffer zone with a radius of 500 m. Dissolved oxygen（DO）， permanganate index（IMn） and total phosphorus（TP） had the highest correlation with forest in the circular buffer zone with a radius of 1 500 m. Ammonia nitrogen（NH3 N） had the highest correlation with development land in the circular buffer zone with a radius of 1 000 m. In the circular buffer zones， R2 of MLR model ranged from 0.132 to 0.431， and that of GWR model ranged from 0.287 to 0569， both of which were better than that of riparian buffer zone. |
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