摘要
汾河是山西省工农业生产和人民生活用水的主要水源,水质质量对整个流域的健康程度起着至关重要的作用,因此解析流域水质及其污染源能为流域水环境治理和管理提供基础数据和技术支持。文章以汾河流域为研究区,通过现场实测结合模型构建,分析该流域磷污染的赋存特征,量化磷的污染来源。结果表明:汾河流域水体总磷浓度范围在0.011~0.433 mg/L,平均值0.187 mg/L,上游磷含量满足水质Ⅱ类考核指标,中下游基本满足Ⅳ类考核指标;汾河流域水体中无机磷浓度在0.000~0.304 mg/L,平均值0.093 mg/L,有机磷浓度范围在0.011~0.295 mg/L,平均值0.094 mg/L,其中上游以有机磷为主,中下游有机磷、无机磷占比相当,这与沿河产业分布密切相关。沉积物中磷含量为63.9~492 mg/kg,平均值为257 mg/kg,属于轻度污染。总磷的沉积物-水分配系数为313~36182 L/kg,总体呈现上游高下游低的趋势,特别是流量相对静止、沉积物有机质含量相对较高的汾河水库出口Kp较高。利用SWAT模型对汾河流域的总磷污染现状及污染源进行解析,城镇居民生活污水排放是汾河流域总磷的重要污染源。
Fen River was the main source of water for industrial and agricultural production and people living in Shanxi Province.Water quality plays a crucial role in health.Therefore,the analysis of the water quality and its pollution sources can provide basic data and technical support for water environment management in the basin.The paper analyzed the phosphorus fractions and quantified the source of the phosphorus pollution in the Fenhe River basin through field measurements and the model construction.The results showed that the concentration of total phosphorus in the Fenhe River basin ranged from 0.011 to 0.433 mg/L with an average of 0.187 mg/L,the content of phosphorus in upper reaches meet standardⅡand the lower reaches meet standardⅣ.The concentration of inorganic phosphorus in the Fenhe River basin ranged from 0.000 to 0.304 mg/L with an average of 0.093 mg/L,and the concentration of organic phosphorus ranged from 0.011 to 0.295 mg/L with an average of 0.094 mg/L.Organic phosphorus was dominant in the upper reaches and the proportion of organic phosphorus and inorganic phosphorus was similar in the middle and lower reaches,which was closely related to the industrial distribution along the river in the lower reaches.The phosphorus content in sediments ranged from 63.9 to 492 mg/kg with an average of 257 mg/kg,which belonged to a mild pollution.The sediment-water distribution ranged from 313 to 36182 L/kg,with a general trend of high in the upper reaches and low in the lower reaches,especially in Fenhe Reservoir,where the flow was relatively static and the sediment organic matter content was relatively high.The Soil and Water Assessment Tool(SWAT)model was used to analyze the present situation and pollution sources of total phosphorus in Fenhe River basin,the results showed that urban sewage discharge was an important source of the phosphorus pollution in Fenhe River basin.
作者
韩文辉
宋姗娟
王林芳
党晋华
HAN Wenhui;SONG Shanjuan;WANG Linfang;DANG Jinhua(Shanxi Ecological Environment Monitoring and Emergency Response Centre(Shanxi Academy of Eco-environmental Sciences),Taiyuan 030027;Shanxi Agricultural University sorghum Research Institute,Jinzhong 030602)
出处
《环境保护科学》
CAS
2023年第6期100-104,共5页
Environmental Protection Science
基金
山西省新兴产业领军人才项目(SXLJRC202007)
山西省应用基础研究项目(201701D121l16)
山西省重点研发项目(201803D31211-1)。
关键词
汾河流域
磷
赋存形态
来源解析
Fenhe River Basin
phosphorus
fractions
sources analysis
作者简介
韩文辉(1976-),女,正高级工程师。研究方向:流域生态环境保护、污染土壤修复与治理研究。E-mail:329633448@qq.com;通信作者:党晋华(1963-),女,正高级工程师。研究方向:流域管理与生态健康评估、污染土壤修复与治理、矿山生态环境保护。E-mail:984736173@qq.com。
