The Law of Endogenous Pollution Release from Reservoirs in Arid Regions

Abstract

To maintain a healthy water eco-environment in the Yazidang Reservoir of the Ningxia Hui Autonomous Region of China, this study designed an indoor experiment to simulate the release of nitrogen and phosphorus and study the influencing factors in it. In the experiment, environmental factors of water temperature, pH, and dissolved oxygen (DO) were changed one by one to study the law of the release intensity of nitrogen and phosphorus, and the results revealed that: with the rise of temperature, the release amount of nitrogen and phosphorus increases significantly; the release intensity is the lowest under neutral condition and higher under acidic or alkaline conditions; under different DO levels, the change trend of nitrogen and phosphorus release is obvious, the release intensity increases significantly in anoxic environment, while in oxygen-rich environment, it decreases obviously. The research is very meaningful for the water pollution control of the Yazidang Reservoir and the eco-environment protection of inflow rivers, and the research findings attained in this paper could provide useful evidence for the water environment management and water ecology restoration of Yazidang Reservoir.