漓江中上游会仙小流域水系氮磷浓度时空特征

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英文篇名：Temporal and Spatial Characteristics of Nitrogen and Phosphorus Concentrations in the Huixian Small Watershed System in the Upper and Middle Reaches of Lijiang River 作者：谢晓琳 ; 代俊峰 ; 俞陈文炅 ; 苏毅捷 ; 张丽华 英文作者：XIE Xiao-lin;DAI Jun-feng;YU Chen-wen-jiong;SU Yi-jie;ZHANG Li-hua;Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology;Collaborative Innovation Center for Water Pollution Control and Water Security in Karst Region, Guilin University of Technology; 关键词：漓江流域 ; 灌区 ; 氮磷 ; 时空分布 英文关键词：Lijiang River Basin;;irrigation area;;nitrogen and phosphorus;;spatial and temporal distribution 中文刊名：中国农村水利水电 英文刊名：China Rural Water and Hydropower 机构：桂林理工大学广西环境污染控制理论与技术重点实验室;桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心; 出版日期：2019-05-15 出版单位：中国农村水利水电 年：2019 期：05 基金：国家自然科学基金项目(51569007);; 广西自然科学基金项目(2015GXNSFCA139004,2018GXNSFAA294087);; 国际岩溶研究中心国际合作项目开放课题项目(KDL201601) 语种：中文; 页：76-81 页数：6 CN：42-1419/TV ISSN：1007-2284 分类号：X52

摘要

以漓江流域中上游青狮潭灌区内会仙小流域为研究对象,开展灌区小流域氮磷时空分布特征的研究。对小流域内4条河流的水质进行连续定位监测,分析监测断面污染物氮磷输出浓度的污染特征及降雨对氮磷迁移的影响。结果表明,不同河流氮磷质量浓度在时空分布上差异较大。在时间分布上,4条河流总磷质量浓度表现出灌溉期>非灌溉期的特征,总氮则表现出非灌溉期>灌溉期的特点;氨氮的排放浓度较为复杂,其中,古桂柳运河、会仙河的氨氮浓度表现出灌溉期>非灌溉期,而睦洞河和相思江氨氮浓度则相反。在空间分布上,睦洞河氮磷浓度沿程呈现波动性变化,会仙河、古桂柳运河氮磷浓度呈沿程增大趋势,相思江氮磷质量浓度沿程呈减小趋势。试区年际间的降雨量和氮磷排放浓度差异不显著,但降雨对氮磷浓度变化存在一定的影响,枯水期到平水期氮磷浓度随降雨量增加而增大,进入丰水期后雨量大幅增加,河流氮磷浓度增幅变缓或呈下降趋势。
        A typical small watershed in Huixian Wetland in the Lijiang River Basin is selected as the research area to study the characteristics of nitrogen and phosphorus migration and transformation. The water quality of four different rivers in the typical small watershed is continuously monitored, and the spatio-temporal distribution characteristics of nitrogen and phosphorus output concentrations and the effect of rainfall on nitrogen and phosphorus transportation are analyzed. The results show that the spatial distribution of nitrogen and phosphorus in different rivers varied greatly. On a timescale, the TP concentration of each river shows the characteristics of irrigation period > non-irrigation period, while TN shows the opposite characteristic. The emission concentration of NH~+_4-N is more complicated, the NH~+_4-N concentration of Ancient Guiliu Canal and Huixian River shows irrigation period > non-irrigation period, while in Xiangsi River and Mudong River are quite the contrary. At a spatial scale, the nitrogen and phosphorus concentrations in the Mudong River show a fluctuant trend, while the concentrations of nitrogen and phosphorus in the Huixian River and Ancient Guiliu Canal show an increasing trend along the river, and the concentrations of nitrogen and phosphorus decreases along the Xiangsi River. There are no significant differences in rainfall and nitrogen and phosphorus concentrations between different years, but precipitation does have a certain influence on the change of nitrogen and phosphorus concentrations. The concentrations of nitrogen and phosphorus increase with the increase in rainfall from the dry period to flat period, and the rainfall soared after entering the wet period and the concentrations of nitrogen and phosphorus in rivers rose insignificantly or show a downward trend.

引文

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