Research on Water Quality Simulation and Water Environmental Capacity in Lushui River Based on WASP Model

Abstract

In recent years, the severe deterioration of water quality and eutrophication in the Yangtze River has brought much trouble to people’s lives. Because of this, numerous management departments have paid more and more attention to the treatment of the water environment. In order to respond to water environmental protection policy and provide management departments with a basis for refining water quality, this paper takes the Zhuzhou section of Yangtze River-Lushui watershed as its research object. First, we used the Water Quality Analysis Simulation Program (WASP) model as a tool, and obtained the pollution load using the FLUX method formula. During the calibration process, the sensitivity analysis method, the orthogonal design method, and the trial and error method were used. Then, we verified the results by using water quality monitoring data published by Zhuzhou Ecological Environment Bureau. Following that, the water environmental capacity of the Lushui River in normal, wet and dry periods was calculated using the WASP model: the chemical oxygen demand (COD) was 14,072.94 tons/yr, 17,147.7 tons/yr and 10,998.18 tons/yr, respectively; ammonia nitrogen (AN) was 469.098 tons/yr, 571.59 tons/yr and 366.606 tons/yr, respectively; and total phosphorus (TP) was 93.8196 tons/yr, 114.318 tons/yr and 73.3212 tons/yr, respectively. The results show that the WASP model is applicable and reliable and can be used as an effective tool for water quality prediction and management in this area.

Modeling the Water Quality of the Middle Section of the Northern Great River (Dissolved Oxygen and Water Temperature) Using WASP8 Model

“…The values of the index of agreement of all sites and the studied indicators ranged from 0.92 to 0.96. These values show the ability of the WASP model as an efficient modeling tool for predicting water quality and its management in the studied areas [14]. The dissolved oxygen in the water is considered one of the most important indicators of the water quality, as the breathing of the living creatures in the water depends on the dissolved oxygen in it.…”

Applicability of the WASP Model in an Assessment of the Impact of Anthropogenic Pollution on Water Quality—Dunajec River Case Study

“…One commonly used and effective method for calibrating water quality models is trial and error. In their work, Obin et al [53] and Huang and Tian [54], using this method, achieved satisfactory and reasonable results for calibrating model parameters. In the presented study, similarly to Iqbal et al [15], the input data used in the construction of the first reference scenario were used to calibrate the model by trial and error.…”

A comprehensive review of water quality control on lentic ecosystem through the water quality, IoT and aeration models

“…The numerical calculations and simulated values from WASP for BOD loading, BOD decay, reaeration, and DO saturation rates accurately corresponded to the field data gathered. Instead of using the mass-balance equation, Munirah et al (2021) However, in the same year, Obin et al (2021) discovered that velocity and depth are the hydraulic factors that are necessary for flow functions in WASP. Therefore, Manning's equation is utilized to compute the velocity and average flow based on the dimensions of breadth and depth for each section in the river.…”