文献类型：期刊文献

中文题名：山区河流氮磷空间分布对人类活动的响应--以赤水河一级支流桐梓河为例

英文题名：Response of Spatial Distribution of Nitrogen and Phosphorus to Human Activities in Mountainous Rivers-A Case Study of Tongzi River,a First--grade Tributary of Chishui River

作者：周晓雯 安艳玲 吴起鑫 吕婕梅 高世林 李钒玺

第一作者：周晓雯

机构：[1]贵州大学喀斯特环境与地质灾害防治重点实验室,贵阳550025;[2]贵州理工学院,贵阳550002

第一机构：贵州大学喀斯特环境与地质灾害防治重点实验室,贵阳550025

年份：2021

卷号：28

期号：4

起止页码：179-185

中文期刊名：水土保持研究

外文期刊名：Research of Soil and Water Conservation

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：贵州理工学院高层次人才科研启动经费项目(2019[45]);贵州省科技计划项目(黔科合支撑[2018]20101);贵州省水利厅科技资助项目(KT201508);国家自然科学基金(41603123,41763019,41501018);国家自然科学基金委—贵州省喀斯特联合资助项目(U1612442);贵州省科技厅联合资助项目(黔科合LH字[2016]7457号);贵州一流学科建设(GNYL[2017]007)。

语种：中文

中文关键词：山区河流;氮磷;空间分布;人类活动

外文关键词：mountain river;nitrogen and phosphorus;spatial distribution;human activities

摘要：为了解人类活动影响下的山区河流氮磷分布情况,以赤水河一级支流桐梓河为对象,开展野外调研,对其干流及各条支流进行了水样采集并分析。结果表明:桐梓河总氮、总磷浓度均值分别为2.85,0.13 mg/L。氮磷浓度的空间差异比较明显,总氮从上游到下游呈波动式增长,总磷则上游高于中下游。总氮有明显的累积效应,从上游源河的1.34 mg/L,升高到下游河口的3.40 mg/L,其空间变化主要受上游城镇污水的点源输入、中下游农业面源污染及水利工程等综合影响。而上游城镇外源污染对总磷的输入,使其在桐梓县城段的干流浓度维持在0.16 mg/L,到下游河口则降低至0.09 mg/L,说明桐梓河受人为污染输入与水体自净能力的双重作用。桐梓河氮磷比例关系总体表现为磷限制,但上游城镇段河流显示处于潜在富营养区,水质可能受到氮磷污染威胁。
In order to understand the distribution of nitrogen and phosphorus in mountainous rivers under the influence of human activities,the Tongzi River,the first tributary of Chishui River,was taken as the object to carry out field investigation,and water samples of its main stream and various tributaries were collected and analyzed.The results show that the average concentrations of total nitrogen,total phosphorus are 2.85 mg/L and 0.13 mg/L,respectively;the spatial difference of nitrogen and phosphorus concentrations is obvious;total nitrogen fluctuates from upstream to downstream,while total phosphorus is higher in the upstream than in the downstream;total nitrogen has a significant cumulative effect,from 1.34 mg/L in the upstream source river to 3.40 mg/L in the downstream estuary,and its spatial change is mainly affected by the point source input of the upstream urban sewage,the agricultural non-point source pollution in the middle and lower reaches and the water conservancy project;the input of total phosphorus from external sources of pollution in the upper reaches of the town kept the main stream concentration of Tongzi County at 0.16 mg/L,and it decreased to 0.09 mg/L at the downstream estuary,indicating the dual role of human pollution input and water self-purification ability in Tongzi River.The overall ratio of nitrogen to phosphorus in the Tongzi River is restricted by phosphorus,but it is shown that the upstream urban section of the river is in a potentially eutrophic area,and the water quality may be threatened by nitrogen and phosphorus pollution.