研究报告
袁博宇,柳海涛,任廷鸿,张一冰,顾华.一种考虑水生态修复措施对污染物降解影响的水质模型[J].环境科学学报,2018,38(10):4057-4062
一种考虑水生态修复措施对污染物降解影响的水质模型
- A water quality model considering the influence of ecological restoration on pollutants degradation
- 基金项目：水利部"948"计划资助项目（No.201514）
- 作者
- 单位
- 袁博宇
- 北京市南水北调大宁管理处, 北京 102442
- 柳海涛
- 中国水利水电科学研究院, 北京 100038
- 任廷鸿
- 贵州松柏山水库管理处, 贵阳 550025
- 张一冰
- 河南省水利勘测设计研究有限公司, 郑州 450016
- 顾华
- 北京市水科学技术研究院, 北京 100048
- 摘要：针对水域中生态修复措施对污染物降解规律的影响，建立了平面二维水流-水质计算模型.该模型通过采用特征有限元方法，在各种吸附性边界下均能保持污染物浓度变化的单调性；通过采用2阶龙格-库塔法求解上游源头浓度特征点的位置，使得模型在流线弯曲条件下的特征浓度计算精度得到明显改善；通过分区指定水流糙率与紊动粘滞系数、污染物扩散与降解系数，可以具体分析水域内各种水质改善措施的实际效果；通过典型算例，证明模型具有较好的适应性和可靠性，为今后水生态修复工程方案的设计提供了一种定量分析工具.
- Abstract：A two-dimensional water quality numerical model is developed to analyze the influence of ecological restoration on the variation of water pollutants degradation. By using the characteristic finite element method, the model can maintain the time monotonicity of the pollutant concentration in the convection dominated flow field with complex adsorptive conditions; By using the 2 order Runge-Kutta method to track the characteristic points along the streamline, the precision of the pollutant concentration under the streamline bending condition is improved; By specifying the flow roughness and pollutant degradation coefficient by element, the model can be used to evaluate the actual effect of various regional water quality improvement measures. The adaptability and robustness of the model were verified with the computational results of a typical engineering case, which provides an analytical tool for the design of water ecological restoration project in the future.
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