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| 桂林市相思江流域氮磷分布特征解析及空间变化预测 |
| Distribution Characteristics and Spatial Change Prediction of Nitrogen and Phosphorus in Xiangsi River Basin of Guilin |
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| DOI： |
| 中文关键词: 水质 非点源氮磷 反距离权重插值 空间趋势分析 相思江流域 |
| 英文关键词: Water quality Non point source of nitrogen and phosphorus Inverse distance weighted interpolation Spatial trend analysis Xiangsi River basin |
| 基金项目:国家自然科学基金资助项目（51578171，51868012） |
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| 中文摘要: |
| 通过2019年6—12月对相思江流域（临桂段）丰水期和枯水期的水质监测分析，并采用主成分分析（PCA）对污染初步溯源和反距离加权插值（IDW）对氮磷质量浓度空间变化插值预测。结果表明：研究区内氮磷污染严重，TN和TP质量浓度范围分别为0.312 mg/L～14.744 mg/L和0.004 mg/L～0.452 mg/L，TN质量浓度枯水期高于丰水期，TP两水期大致相等。研究区内非点源氮磷呈现出明显空间变异性，上游氮磷污染最为严重。农业面源污染中禽畜养殖和生活污水是流域内主要污染因子。 |
| 英文摘要: |
| In this study, the source of nitrogen and phosphorus was traced preliminarily by principal component analysis (PCA)and the spatial variation of their mass concentration was 〖JP2〗predicted by inverse distance weighted interpolation (IDW) based on water quality monitoring data in the wet and dry season of Xiangsi River basin from June to December 2019. The results showed that nitrogen and phosphorus pollution in the study area was serious. The mass concentrations of TN and TP were 0.312 mg/L～14.744 mg/L and 0.004 mg/L～0.452 mg/L, respectively. The mass concentration of TN was higher in the dry season than that in the wet season, while the mass concentration of TP was roughly equal in the two seasons. Non point source of nitrogen and phosphorus in the study area had obvious spatial variability. Nitrogen and phosphorus〖JP〗 pollution was severe in upper reaches of the river. Livestock breeding and domestic sewage were the main factors in agricultural non point source pollution. |
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