Water Quality in Representative Tuojiang River Network in Southwest China

To control pollutants in rivers, we need to have an understanding of the spatial and temporal variations on water quality in complex river networks. In this study, 153 sampling sties were located in Chengdu segment of Tuojiang River in 2017, 23 monitoring stations in Tuojiang River in the Chengdu se...

Full description

Bibliographic Details
Main Authors: Wenqiang Zhang, Xin Jin, Huiming Cao, Yu Zhao, Baoqing Shan
Format: Article
Language:English
Published: MDPI AG 2018-06-01
Series:Water
Subjects:
Online Access:http://www.mdpi.com/2073-4441/10/7/864
id doaj-78b40520df684d309228f44379097e82
record_format Article
spelling doaj-78b40520df684d309228f44379097e822020-11-24T20:45:58ZengMDPI AGWater2073-44412018-06-0110786410.3390/w10070864w10070864Water Quality in Representative Tuojiang River Network in Southwest ChinaWenqiang Zhang0Xin Jin1Huiming Cao2Yu Zhao3Baoqing Shan4State Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, P.O. Box 2871, Beijing 100085, ChinaState Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, P.O. Box 2871, Beijing 100085, ChinaZhongke Tongde (Beijing) Ecology Technology Co., Ltd., Beijing 100124, ChinaState Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, P.O. Box 2871, Beijing 100085, ChinaState Key Laboratory on Environmental Aquatic Chemistry, Research Center for Eco-Environmental Science, Chinese Academy of Science, P.O. Box 2871, Beijing 100085, ChinaTo control pollutants in rivers, we need to have an understanding of the spatial and temporal variations on water quality in complex river networks. In this study, 153 sampling sties were located in Chengdu segment of Tuojiang River in 2017, 23 monitoring stations in Tuojiang River in the Chengdu segment from 2011 to 2016 were also collected. According to the data from the monitoring station, the concentrations of total nitrogen (TN), total phosphorus (TP), ammonia nitrogen (NH4+), and chemical oxygen demand (CODcr) concentrations were exceeded the water quality targets at 22, 14, 10, and 3 of the 23 monitoring stations, respectively. The regression analysis showed the NH3, TN and TP was increased from 2011 to 2016 (R2NH4+ = 0.30, p < 0.05; R2TN = 0.88, p < 0.05; R2TP = 0.30, p < 0.05), which indicated water quality was deteriorated from 2011 to 2016. In the 153 sample sites, the NH4+, CODcr, TP and TN concentrations exceeded the class III water quality threshold at 23%, 23%, 26%, and 99% of the total sampling sites, respectively. Correlation analysis showed that the main sources of NH4+, CODcr, TN, and TP (R2NH4+-CODcr = 0.572; R2NH4+-TN = 0.543; R2NH4+-TP = 0.537, p < 0.01) were municipal domestic sewage. The main pollutants in Tuojiang river network were TN and TP, high P and N concentrations probably contribute to the deterioration of surface water quality at some sampling sites (R2TPs-TP = 0.183 and R2TNs-NH4+ = 0.472, p < 0.01). TP, TN, TP in the sediments (TPs), and TN in the sediments (TNs) have accumulated in the river system because the river morphology has been changed by, for example, the damage of riparian zones and the construction of water conservation structures. The results from this study will support initiatives to improve the overall water quality and function of the river ecosystem.http://www.mdpi.com/2073-4441/10/7/864river networkwater qualitysedimentriver ecosystemriparian zone
collection DOAJ
language English
format Article
sources DOAJ
author Wenqiang Zhang
Xin Jin
Huiming Cao
Yu Zhao
Baoqing Shan
spellingShingle Wenqiang Zhang
Xin Jin
Huiming Cao
Yu Zhao
Baoqing Shan
Water Quality in Representative Tuojiang River Network in Southwest China
Water
river network
water quality
sediment
river ecosystem
riparian zone
author_facet Wenqiang Zhang
Xin Jin
Huiming Cao
Yu Zhao
Baoqing Shan
author_sort Wenqiang Zhang
title Water Quality in Representative Tuojiang River Network in Southwest China
title_short Water Quality in Representative Tuojiang River Network in Southwest China
title_full Water Quality in Representative Tuojiang River Network in Southwest China
title_fullStr Water Quality in Representative Tuojiang River Network in Southwest China
title_full_unstemmed Water Quality in Representative Tuojiang River Network in Southwest China
title_sort water quality in representative tuojiang river network in southwest china
publisher MDPI AG
series Water
issn 2073-4441
publishDate 2018-06-01
description To control pollutants in rivers, we need to have an understanding of the spatial and temporal variations on water quality in complex river networks. In this study, 153 sampling sties were located in Chengdu segment of Tuojiang River in 2017, 23 monitoring stations in Tuojiang River in the Chengdu segment from 2011 to 2016 were also collected. According to the data from the monitoring station, the concentrations of total nitrogen (TN), total phosphorus (TP), ammonia nitrogen (NH4+), and chemical oxygen demand (CODcr) concentrations were exceeded the water quality targets at 22, 14, 10, and 3 of the 23 monitoring stations, respectively. The regression analysis showed the NH3, TN and TP was increased from 2011 to 2016 (R2NH4+ = 0.30, p < 0.05; R2TN = 0.88, p < 0.05; R2TP = 0.30, p < 0.05), which indicated water quality was deteriorated from 2011 to 2016. In the 153 sample sites, the NH4+, CODcr, TP and TN concentrations exceeded the class III water quality threshold at 23%, 23%, 26%, and 99% of the total sampling sites, respectively. Correlation analysis showed that the main sources of NH4+, CODcr, TN, and TP (R2NH4+-CODcr = 0.572; R2NH4+-TN = 0.543; R2NH4+-TP = 0.537, p < 0.01) were municipal domestic sewage. The main pollutants in Tuojiang river network were TN and TP, high P and N concentrations probably contribute to the deterioration of surface water quality at some sampling sites (R2TPs-TP = 0.183 and R2TNs-NH4+ = 0.472, p < 0.01). TP, TN, TP in the sediments (TPs), and TN in the sediments (TNs) have accumulated in the river system because the river morphology has been changed by, for example, the damage of riparian zones and the construction of water conservation structures. The results from this study will support initiatives to improve the overall water quality and function of the river ecosystem.
topic river network
water quality
sediment
river ecosystem
riparian zone
url http://www.mdpi.com/2073-4441/10/7/864
work_keys_str_mv AT wenqiangzhang waterqualityinrepresentativetuojiangrivernetworkinsouthwestchina
AT xinjin waterqualityinrepresentativetuojiangrivernetworkinsouthwestchina
AT huimingcao waterqualityinrepresentativetuojiangrivernetworkinsouthwestchina
AT yuzhao waterqualityinrepresentativetuojiangrivernetworkinsouthwestchina
AT baoqingshan waterqualityinrepresentativetuojiangrivernetworkinsouthwestchina
_version_ 1716813558449176576