Long-term variations of water quality and nutrient load inputs in a large shallow lake of Yellow River Basin: Implications for lake water quality improvements

被引:13
作者
Yu, Shengyue [1 ]
Du, Xinzhong [1 ]
Lei, Qiuliang [1 ]
Wang, Xue [2 ]
Wu, Shengcai [3 ]
Liu, Hongbin [1 ]
机构
[1] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Key Lab Nonpoint Source Pollut Control,Minist Agr, Beijing 100081, Peoples R China
[2] Water Conservancy Sci & Technol Test Ctr Hetao Irr, Bayannur 015000, Inner Mongolia, Peoples R China
[3] Agr & Anim Husb Technol Promot Ctr, Bayannur 015100, Inner Mongolia, Peoples R China
关键词
Wuliangsuhai Lake; Trend analysis; Water quality; Nutrient load inputs; POLLUTION; WULIANGSUHAI; STREAM;
D O I
10.1016/j.scitotenv.2023.165776
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Many studies have investigated water quality changes in freshwater lakes, however, studies examining long-term relationships between lake water quality and total nitrogen (TN) and total phosphorus (TP) load inputs and investigating the causes that indicate improvements in water quality are limited. In this study, we utilized the LOADEST model to estimate TN and TP load inputs, assessed lake trophic status using the integrated nutrient index method, and explored trends and relationships between nutrient load inputs and water quality in Wuliangsuhai Lake, a large shallow lake of Yellow River Basin in China. Additionally, we identified the causes for recent water quality improvements and proposed future management strategies to further improve the water quality. Our findings revealed that water quality in Wuliangsuhai Lake of Yellow River basin has been improved mainly due to the abatements of nutrient load inputs from the watershed. Between 2010 and 2020, TN and TP loads from the watershed decreased significantly by 65.12 % and 89.4 %, respectively. TN and TP concentrations also notably decreased across the lake areas, including the inlet (91.21 % and 95.59 %), central (73.49 % and 87.12 %), and outlet (40.68 % and 40.54 %) areas. Correlation analysis confirms a strong positive relationship between lake water quality and nutrient load inputs (excluding the outlet area), highlighting the impact of nutrient inputs on lake water quality. The results indicated that the recent water quality improvements in the lake was mainly because of effective control for point source pollution from industrial wastewater and domestic sewage and the non-point source pollution control holds the potential to further improve the water quality.
引用
收藏
页数:10
相关论文
共 37 条
[1]  
Chen X., 2022, LEATH MANUF ENV TECH, V3, P128
[2]   Nitrate reduction pathways in the presence of excess nitrogen in a shallow eutrophic estuary [J].
Domangue, Rebecca J. ;
Mortazavi, Behzad .
ENVIRONMENTAL POLLUTION, 2018, 238 :599-606
[3]  
Dong Quan, 2019, Hupo Kexue, V31, P1259, DOI 10.18307/2019.0503
[4]  
Fu JuYing Fu JuYing, 2014, Environmental Science & Technology (China), V37, P169
[5]  
Ge M., 2020, WATER RESOUR PLAN, V3, P24
[6]   Evaluation and variation trends analysis of water quality in response to water regime changes in a typical river-connected lake (Dongting Lake), China [J].
Geng, Mingming ;
Wang, Kelin ;
Yang, Nan ;
Li, Feng ;
Zou, Yeai ;
Chen, Xinsheng ;
Deng, Zhengmiao ;
Xie, Yonghong .
ENVIRONMENTAL POLLUTION, 2021, 268
[7]  
[黄宏 Huang Hong], 2020, [环境科学学报, Acta Scientiae Circumstantiae], V40, P188
[8]  
[姜瑶 Jiang Yao], 2020, [水利学报, Journal of Hydraulic Engineering], V51, P845
[9]   Monitoring of water quality and assessment of organic pollution load in the Nilufer Stream, Turkey [J].
Karaer, F ;
Küçükballi, A .
ENVIRONMENTAL MONITORING AND ASSESSMENT, 2006, 114 (1-3) :391-417
[10]   Evaluation of Regression Models of LOADEST and Eight-Parameter Model for Nitrogen Load Estimations [J].
Kim, Jonggun ;
Lim, Kyoung Jae ;
Park, Youn Shik .
WATER AIR AND SOIL POLLUTION, 2018, 229 (06)