Construction of Water Environment Carrying Capacity Evaluation Model in Erhai River Basin

Abstract

With the acceleration of urbanization and increasing energy consumption in China, the intensity of pollution emission the pollution load is increasing significantly. In many rivers, the main pollutant load is much more than the environmental capacity of the water, resulting in the destruction of the structure and function of the river basin. This paper puts forward the concept of water environment carrying capacity, and constructs the basic model of calculating water environment carrying capacity, and then takes ErhaiRiver as an example to calculate the carrying capacity of water environment in order to provide reference for relevant researchers. Concept of Water Environment Carrying Capacity With economic and social development, parts of the ecosystem in the rivers and lakes have degraded. In order to improve the ecosystem in the rivers and lakes, we proposethe new theory of ecosystem in the rivers and lakes. Formed in the ecosystem in the rivers and lakes the continuity of the process based, longitudinal arranged in the river lake, is of a mosaic of specific ecological functions of plaque composition. Based on the analysis of the basic characteristics of river basin water ecological system, combined with other related disciplines, the related research results of water environmental carrying capacity, water resources carrying capacity, ecological carrying capacity, ecological protection as the goal, defining the basic connotation of river basin water ecological environment, the water ecological carrying capacity is defined as: water ecological carrying capacity is in the water ecological function area, and can support the ecological system structure and function and sustainable development. The connotation of water ecological carrying capacity of the river basin is mainly from the connotation of ecological connotation and economic society. River Basin water ecological carrying the ecological connotation of force can achieve maximum ecological development of aquatic ecosystem health scale.Lakes and river ecological system in the process of basin of matter and energy cycle has the important function of habitat, filtering, shielding, a channel. However, due to the rapid development of human society and economy, the structure and International Conference on Economics, Social Science, Arts, Education and Management Engineering (ESSAEME 2015) © 2015. The authors Published by Atlantis Press 247 function of the internal ecosystem of the river basin have been destroyed, and the stability of the ecosystem cannot be guaranteed. Therefore, there is an ecological limit regulation in the game of the river basin water ecological system and social economic system. The ecological limit of water ecosystem cannot be separated from the value of the specific area population and the specific utility needs. In the same water resource utilization and sewage discharge, the social economic capacity or scale will be different, which will make the ecological carrying capacity of water has a social and economic connotation. In recent years, the contradiction between ecologicaland economy are becoming more and more obvious, and the understanding of the economic connotation should more reflect the relationship and mechanism between the main body and object of the river basin water ecological carrying capacity. We should adjust the internal structure, growth mode and spatial distribution of the social economic development. Evaluation Model of Water Environment Carrying Capacity This paper constructs basin water environment bearing force calculation method of the system, development of reaction ErhaiRiver water dynamics. Lake water dynamics and water quality model and in the model as a calculation tool, according to the water environment bearing capacity calculation method of system, calculate the Erhai River, the main pollutants of water environment bearing capacity. Water Quality Coefficient. The equilibrium concentration field can be regarded as the linear superposition of the different pollution sources. We assume i C is the separate concentration fielding of number i pollution sources i Q . bi C is the background concentration of the water quality control point, the concentration field in the presence of n pollution sources: