Open AccessAnalysis of indexes exceeding water quality standards in the Yangtze River basin during the 13th Five-Year Plan period
Author(s) -
Lin Li,
Mi Zhou,
Luyu Yan,
Xin Lv,
Fengying Zhang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/675/1/012031
Subject(s) - environmental science , yangtze river , water quality , pollution , period (music) , hydrology (agriculture) , structural basin , five year plan , drainage basin , environmental protection , water resource management , environmental chemistry , geography , china , chemistry , ecology , geology , biology , archaeology , physics , geotechnical engineering , acoustics , paleontology , cartography
Based on monitoring data from 615 comparable sections of the Yangtze River Basin (YRB) in the national eco-environmental monitoring network during the 13 th Five-Year Plan period, the spatiotemporal characteristics of Total phosphorus (TP), Ammonia nitrogen (NH 3 - N), and Chemical oxygen demand (COD) were analyzed. The results showed that during the study period, the overall pollution of the main rivers in the YRB had been mitigated, and the measured amounts of TP, NH 3 -N, and COD had decreased. However, the annual concentrations of TP, NH 3 -N, and COD had increased in nearly one-third of the sections, and in some sections they increased greatly. Increased TP was mainly observed in the provinces of Shaanxi, Sichuan, Hunan, and Hubei. Increased NH 3 -N was mainly observed in Hubei and Sichuan, and increased COD was mainly observed in Hunan, Sichuan, Hubei, and Shanghai. Since the first year of the 13 th Five-Year Plan, the water quality of the main rivers in the YRB has continuously improved; however, in some sections the concentrations of some indexes already above water quality standards increased sharply. Under the protection strategy of the Yangtze River Economic Zone, the 14 th Five-Year Plan will emphasize requirements for ecological environmental protection to improve the water quality in the YRB.