文献类型：期刊文献

中文题名：贵州高原山区河流桐梓河氮磷输出通量研究

英文题名：A Study of the Export Fluxes of Nitrogen and Phosphorus from the Mountain River Tongzi River in Guizhou Plateau

作者：周晓雯 安艳玲 吕婕梅 于霞 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

期号：11

起止页码：37-42

中文期刊名：中国农村水利水电

外文期刊名：China Rural Water and Hydropower

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：国家自然科学基金项目(41603123,41763019,41501018);贵州理工学院高层次人才科研启动经费项目(2019[45]);国家自然科学基金委-贵州省喀斯特联合基金项目(U1612442);贵州省科技计划项目(黔科合支撑[2018]20101)。

语种：中文

中文关键词：高原山区河流;氮磷;输出通量;输出系数模型;非点源污染

外文关键词：mountain river in plateau;nitrogen and phosphorus;export flux;export coefficient model;non-point source pollution

摘要：为研究贵州高原山区河流氮磷输出特征,以赤水河一级支流桐梓河为对象,对其水质氮磷输出特征及流域内非点源污染进行了分析,估算了氮磷的输出通量,并根据流域2000、2010、2015年的土地利用类型情况,利用输出系数模型对非点源氮磷污染进行量化。结果表明,桐梓河TN、TP的输出通量为253.78 g/s、6.43 g/s,对赤水河的氮磷水平影响较大;输出系数模型结果显示,15年间,流域的非点源污染TN输出负荷总量从2000年的5039.90 t/a、2010年的4729.20 t/a下降至2015年的4516.84 t/a,TP从2000年的161.13 t/a、2010年的153.29 t/a下降至2015年的146.16 t/a。从土地利用类型来看,耕地非点源污染TN、TP均呈显著减少趋势,其贡献率也逐年降低,但耕地对TN、TP贡献率依旧占主导地位。2010-2015年较2000-2010年,由土地类型转变所导致的TN、TP负荷变化量相对缓和,这15年间,桐梓河流域的耕地流转变化对非点源氮磷污染输出负荷总量影响最大。
In order to study the characteristics of nitrogen and phosphorus export from the mountain rivers in Guizhou Plateau,the Tongzi River,a tributary of the Chishui River,is used to analyze the characteristics of nitrogen and phosphorus export of its water quality and nonpoint source pollution in the basin,and the export fluxes of nitrogen and phosphorus are estimated.According to the land use types of the basin in 2000,2010,and 2015,the export coefficient model is used to quantify non-point source nitrogen and phosphorus pollution.The results show that the export fluxes of TN and TP of Tongzi River are 253.78 g/s and 6.43 g/s,which has a greater impact on the nitrogen and phosphorus levels of Chishui River.The results of the export coefficient model show that in the 15 years,the total export load of non-point source pollution TN in the basin dropped from 5039.90 t/a in 2000,4729.20 t/a in 2010 to 4516.84 t/a in 2015,and TP decreases from161.13 t/a in 2000,153.29 t/a in 2010 to 146.16 t/a in 2015.From the perspective of land use types,the non-point source pollution of cultivated land TN and TP has shown a significant reduction trend,and its contribution rate also decreases year by year,but the contribution rate of cultivated land to TN and TP is still dominant.From 2010 to 2015,compared with 2000 to 2010,the changes in TN and TP load caused by land type conversion are relatively mild.During these 15 years,the change of cultivated land in the Tongzi River Basin has the greatest impact on the total export load of non-point source nitrogen and phosphorus pollution.