水源地水质可达性及保护对策研究——以柳州为例

水质模型能够模拟、预测污染物在水体中的迁移扩散规律，是研究和解决水体污染的一种常用方式，已大量应用于工程可行性研究中，并取得一定的成效。通过建立柳江柳州段二维水流水质耦合模型模拟柳江柳州段的水流水质状况，计算出概化污染源在设计条件下的污染带分布状况，确定该市五个水源地中需要重点研究的两个水源地；建立排污量与混合带范围关系曲线，进行污染源对各水源地水质影响分析，并计算污染源的排污控制量。根据计算结果，柳州市要保证供水水质达标必须采取削减入河污染量或者另设取水口等措施。

Reaching Function Analysis of Water Quality and Protecting Measure in Water Supply Sources——Taking Liuzhou City as an Example

Water quality model can simulate and predict the moving and diffusing law of the pollutant in water body. It is a common method to study and settle the problem of polluted water. A 2-D FVM and Riemann approximate solution model for water quality of the Liujiang River are developed and applied to simulate the flux and quality condition of the water. The main pollutant mixed belts in designed condition are computed, so as to ascertain the two water sources for stressed study. The relationship between the area of the belts and the discharged pollutants are computed. The water quality situation in the water supply place is analyzed and the control discharged pollutants of each influencing pollutant sources are given. In order to ensure that the water quality in water supply sources in Liuzhou city can achieve water standard, pollutants discharged into water must be reduced or the water supply places must be changed.