Reduction of Waste Water in Erhai Lake Based on MIKE21 Hydrodynamic and Water Quality Model

Qinag Liang,Feng Yan,Wenlong Hao,Changjun Zhu

doi:10.1155/2013/958506

Abstract

In order to study the ecological water environment in Erhai Lake, different monitoring sections were set to research the change of hydrodynamics and water quality. According to the measured data, MIKE21 Ecolab, the water quality simulation software developed by DHI, is applied to simulate the water quality in Erhai Lake. The hydrodynamics model coupled with water quality is established by MIKE21FM software to simulate the current situation of Erhai Lake. Then through the comparison with the monitoring data, the model parameters are calibrated and the simulation results are verified. Based on this, water quality is simulated by the two-dimensional hydrodynamics and water quality coupled model. The results indicate that the level of water quality in the north and south of lake is level III, while in the center of lake, the water quality is level II. Finally, the water environment capacity and total emmision reduction of pollutants are filtered to give some guidance for the water resources management and effective utilization in the Erhai Lake.

Highlights

With the development of economy and natural science research capacities, the water environment and river health have drawn more and more attention [1]
MIKE21 is a two-dimensional mathematical model developed by DHI Water & Environment, which can be used to simulate water flow, waves, water quality, and sediment in rivers, lakes, seas, and bays
Liang et al simulated the water level of Hongze lake [7]; Yu et al established a numerical model of diversion project of East Lake using MIKE21 [8]

Summary

Introduction

With the development of economy and natural science research capacities, the water environment and river health have drawn more and more attention [1]. MIKE21 is a two-dimensional mathematical model developed by DHI Water & Environment, which can be used to simulate water flow, waves, water quality, and sediment in rivers, lakes, seas, and bays. Wang et al simulated the water flow and water quality of Jincang Lake in different designs, which provides scientific basis for ecological planning [3]. Liu and Yang studied the water pollution and eutrophication in Hanjiang river and Raihu lakeusing Mike model [5]. As long as there is a good control of river water pollutant capacity, the total amount of pollutants in Erhai can be controlled. MIKE21 is used to simulate the water flow and quality in Erhai Lake, and the water environment capacity is calculated, which has reference for the water quality prediction and water quality control

Methodology

Case Study

Conditions and Parameters

Simulation of Water Quality in Erhai Lake

Conclusions