摘要
针对采煤沉陷区水环境治理及富营养化的问题,以采煤沉陷区为研究对象,采用综合营养指数法评价研究区富营养化程度,利用主成分分析和相关性分析进行污染源解析和基于随机森林识别富营养化关键驱动因子的相对重要性,分析水质季节性变化特征。结果表明:①采煤沉陷区水质呈明显的季节性变化,TP,TN,NH_(3)-N,Chl.a,BOD_(5)和COD在夏秋季高于春冬季。②研究区夏季和秋季水质总体处于中营养状态,部分采样点出现轻度富营养化现象。③TN,TP主要来源于农业面源污染和养殖废水,而NH_(3)-N则与农田灌溉和渔业养殖密切相关。④Chl.a是影响水体富营养化的关键因子,其相对重要性高达48.88%,显著高于TP(10.64%)和TN(3.84%)。
Aiming at the problems of water environment management and eutrophication in the coal mining subsidence area,the coal mining subsidence area was taken as the research object,and the comprehensive nutrient index method was used to evaluate the degree of eutrophication in the study area,and the relative importance of the pollution source analysis and the identification of the key driving factors of eutrophication based on the Random Forest were used for the pollution source analysis and the analysis of the seasonal change characteristics of the water quality by using the Principal Component Analysis and the Correlation Analysis.The results showed that:①The water quality in the coal mining subsidence area showed obvious seasonal changes,and TP,TN,NH_(3)-N,Chl.a,BOD_(5)and COD were higher in summer and autumn than in spring and winter.②The water quality of the study area was generally in mesotrophic state in summer and autumn,and some sampling points showed mild eutrophication.③TN and TP mainly originated from agricultural surface pollution and aquaculture wastewater,while NH_(3)-N was closely related to farmland irrigation and fishery farming.④Chl.a was the key factor affecting eutrophication of the water body,with its relative importance as high as 48.88%,which was significantly higher than that of TP(10.64%)and TN(3.84%).
作者
段金铭
陈孝杨
周育智
宋雅慧
高衍雪
DUAN Jinming;CHEN Xiaoyang;ZHOU Yuzhi;SONG Yahui;GAO Yanxue(School of Earth and Environment,Anhui University of Science and Technology,Huainan Anhui 232001,China;State Key Laboratory of Safe Mining of Deep Coal and Environmental Protection,Huainan Anhui 232001,China)
出处
《佳木斯大学学报(自然科学版)》
2025年第6期169-172,共4页
Journal of Jiamusi University:Natural Science Edition
基金
安徽省重点研究与开发计划项目(S202104a06020064)
光伏扰动下的沉陷积水区生态环境影响及控制技术(HNKY-PG-JS-2023-228)
安徽理工大学研究生创新基金项目(2024x2005)
关键词
采煤沉陷区
季节性变化
富营养化
污染源解析
随机森林
相对重要性
coal mining subsidence area
seasonal variations
eutrophication
pollution source analysis
random forests
relative importance
