摘要
确定河流横向扩散系数的主要方法有经验公式法和河流示踪试验法。以室内模拟试验求横向扩散系数的方法是一种新的尝试,采用几何相似原理,通过不同流量、流速条件下的室内模拟试验,计算出与河流相应条件下的横向扩散系数,所得结果(0.086m2/s)与同条件下现场分析计算的结果(0.079～0.088m2/s)基本一致。模拟试验不仅克服了野外条件下示踪剂投放和测试条件的不便,还能够更好地研究不同水动力条件下污染物的扩散运移规律。
There are two kinds of methods on defining transverse diffusion coefficient of river. One method is empirical formula; another is tracing experiment in situ. A new method to compute transverse diffusion coefficient of river through indoor simulation experiments is tried to be presented. The principle of geometric similarity is adopted to carry out the indoor simulation experiment with different discharge and velocities and then the corresponding transverse diffusion coefficient is calculated as the result of 0.086 m^2/s that is almost the same as the result (0.079～0.088 m^2/s) calculated from the field analysis at the same conditions, at the similar conditions home and broad. This method not only overcome the inconvenience of conditions of tracing medicine playing and test, but also can be used to study the diffusion and movement laws of the pollutants at different hydrodynamic conditions.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2004年第4期560-565,共6页
Journal of Jilin University：Earth Science Edition
基金
国家重点基础研究发展计划项目(G1999045705)
吉林市水资源办资助项目(2002-02)
关键词
横向扩散系数
室内模拟试验
物理模型
数学模型
模拟条件
transverse diffusion coefficient
indoor simulation experiments
physical models
mathematical models
conditions of indoor simulation experiments
