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.
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.
作者
袁博宇
柳海涛
任廷鸿
张一冰
顾华
YUAN Boyu;LIU Haitao;REN Tinghong;ZHANG Yibing;GU Hua(China institute of Water Resources and Hydropower Research,Beijing 100038;Daning Management Office of the Beijing South to North Water Diversion,Beijing 102442;Guizhou Songbaishan Reservoir Administrative Office,Guiyang 550025;Henan Water and Power Engineering Consulting Corporation Limited,Zhengzhou 450016;Beijing Water Science and Technology Institute,Beijing 100048)
出处
《环境科学学报》
CAS
CSCD
北大核心
2018年第10期4057-4062,共6页
Acta Scientiae Circumstantiae
基金
水利部"948"计划资助项目(No.201514)~~
关键词
生态修复
污染物
降解系数
数学模型
ecological restoration
pollutant
degradation coefficient
mathematical mode/
