CAJ | 학술논문

横向混合系数是河流中污染物横向混合特性的重要体现与反映。本文针对不同河道情况下横向混合系数的确定方法进行了分析。首先归纳不同河道的无量纲横向混合系数的量值分布及代表性公式，顺直室内水槽试验的无量纲横向混合系数值在0.1~0.26范围内，天然河道量值分布较为离散，基本大于室内水槽的数值，并对不同代表性公式的适用条件和范围进行阐述；之后总结了利用示踪试验数据计算横向混合系数的各种参数计算方法，矩法和直线图解法简便易操作，线性回归法可分析非惰性污染物，加速遗传算法、人工神经网络等优化算法提高了计算精度并降低了人为主观性；接着详细介绍了弯曲河道中利用横向速度公式带入三重积分来计算横向混合系数的理论方法，Odgaard和Rozovskii的断面横向速度表达式与横向混合系数存在较好的响应关系，量化了二次流对弯曲河道横向混合系数的影响；同时对含植物、有冰层覆盖明渠以及不规则河岸等其他情况下的横向混合系数的探索进行了总结，最后提出了天然河流中横向混合系数研究中有待进一步探讨的问题。
횡향혼합계수시하류중오염물횡향혼합특성적중요체현여반영。본문침대불동하도정황하횡향혼합계수적학정방법진행료분석。수선귀납불동하도적무량강횡향혼합계수적량치분포급대표성공식，순직실내수조시험적무량강횡향혼합계수치재0.1~0.26범위내，천연하도량치분포교위리산，기본대우실내수조적수치，병대불동대표성공식적괄용조건화범위진행천술；지후총결료이용시종시험수거계산횡향혼합계수적각충삼수계산방법，구법화직선도해법간편역조작，선성회귀법가분석비타성오염물，가속유전산법、인공신경망락등우화산법제고료계산정도병강저료인위주관성；접착상세개소료만곡하도중이용횡향속도공식대입삼중적분래계산횡향혼합계수적이론방법，Odgaard화Rozovskii적단면횡향속도표체식여횡향혼합계수존재교호적향응관계，양화료이차류대만곡하도횡향혼합계수적영향；동시대함식물、유빙층복개명거이급불규칙하안등기타정황하적횡향혼합계수적탐색진행료총결，최후제출료천연하류중횡향혼합계수연구중유대진일보탐토적문제。
River transverse mixing coefficient is of importance in reflecting pollutant transverse mixing char-acteristics. The determination methods of the river transverse mixing coefficient were reviewed. The typical dimensionless transverse mixing coefficient and empirical formulas in different channels were summarized, and their application conditions were compared, providing references to estimate transverse mixing coeffi-cient in different shaped channels. Then calculation methods by tracer experimental data were explained in details and their advantages and disadvantages were analyzed. The developments of theoretical formula based on transverse velocity profile in channel bends were also discussed. Moreover,other situations such as vege-tated channels, ice-covered channels and irregular banks were investigated. Finally, further investigation on river transverse mixing coefficient was put forward.