Abstract
This work aimed to assess the water quality of the Tuojiang River Basin in recent years to provide a better understanding of its current pollution situation, and the potential pollution risks and causes. Water quality parameters such as dissolved oxygen (DO), ammonia–nitrogen (NH3-N), total phosphorus (TP), the permanganate index (CODMn), five-day biochemical oxygen demand (BOD5), pH, and concentrations of various heavy metals were measured in the Tuojiang River, according to the national standards of the People’s Republic of China. Samples were collected between 2012 to 2018 at 11 national monitoring sites in the Tuojiang River Basin. The overall water pollution situation was evaluated with back propagation artificial neural network (BP-ANN) analysis. The pollution causes were analyzed considering both industrial wastewater discharge in the upper reaches and the current pollution situation. We found potential risks of excessive NH3-N, TP, Cd, Hg, and Pb concentrations in the Tuojiang River Basin. Moreover, corresponding water pollution control suggestions were given.
Highlights
With the rapid urban and industrial development, water pollution has gradually become a serious issue [1,2,3,4,5]
The back propagation artificial neural network (BP-artificial neural network (ANN)) analyzed the annual average variation and the average value of each monitoring site using the data from the 11 monitoring sites from 2012 to 2018
In order to figure out which independent variables involved in the Back Propagation (BP)-ANN evaluation had a greater contribution to water quality, we adopted the network sensitivity analysis to achieve this goal
Summary
With the rapid urban and industrial development, water pollution has gradually become a serious issue [1,2,3,4,5]. The rapid economic development in Southwest China has led to a series of imbalances between the natural environment and industrial development [10]. According to the Environment Bulletin of Sichuan Province in 2019 [11], there are issues of excessive cadmium, lead, and mercury in the Tuojiang River Basin. The conflict between water resource conservation and industrial development in the Tuojiang River Basin is a typical contradiction between human beings and nature. To control the problems and risks associated with excess heavy metals in the Tuojiang River Basin, it is necessary to understand the pollution causes and potential risks to the Tuojiang River Basin’s water resources
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
