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...
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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 |
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1716813558449176576 |