浏河引排水对城厢镇水质影响的数值计算

城厢镇地表水水源的污染特点在很大程度上取决于浏河闸的运行启闭情况,对通过引排水方案来改善滞流期恶劣的水质状况.文中首先用一维Saint—Venant方程组及CBOD—NBOD—DO联偶反应方程组分别建立水量及水质模式,通过有限差分法数值求解.利用1990年11月5日开闸排水期间水量与水质同步监测资料进行验证,结果表明,模式能够满足水质规划的要求.本文对水质的动态变化规律进行评价,认为只要合理组合引排方案,就能达到改善城厢镇地表水源水质的目的.

NUMERICAL CALCULATION OF THE IMPACT OF WATER INPUT AND OUTPUT OF LIUHE RIVER ON WATER QUALITY OF CHENXIANG TOWN

To a great extend, the pollution characteristics of surface water source of Chenxiang town depends on whether the sluice is opened or closed, therefore the schemes of water drawing and draining may be selected to improve water quality in dry season. 1-D Saint-Venant eqs. are used in the water model, which is composed of DO-CBOD-NBOD. The tow models are solved by FDM method and the calculation results are verified by the data collected in Liuhe River monitoring in 1990. The results of verification demonstrate that these models can generally meet the requirement of water quality planning. Finally, authors give the assessment of dynamic change of water quality and suggest that water quality can be improved if a reasonable schemes of water drawing and draining is adopted.