论汇流参数的推移和坦化作用

On the Transposition and Attenuation Actions of Concentration Parameters

根据对流扩散方程，从数学上定义了洪水波的推移和坦化作用．根据累积量定理，建立了汇流参数与洪水波的波速以及扩散系数之间的关系，并在此基础上，对汇流参数的推移和坦化作用进行了分析和论证．结果表明：在概念性元素方面，线性渠道只反映了洪水波的推移作用，线性水库既反映了洪水波的推移作用，又反映了洪水波的坦化作用；在河道汇流模型中．有些参数单独反映了洪水波的推移或坦化作用，有些参数同时反映了洪水波的推移和坦化作用．

The transposition and attenuation actions of flood wave are defined by means ofconvection and diffusion equation. Based on the relationships between the concentrationparameters and the velocity and diffusion coefficient of flood wave, which are derivedaccording to the cumulant theorem, the transposition and attenuation actions ofconcentration parameters are analyzed and demonstrated. In the field of conceptualwatershed concentration models, the linear channel only reflects flood-wave transpositionaction, and the linear reservoir reflects both flood-wave transposition and attenuationactions. In the field of channel routing models, some concentration parameters reflect floodwave transposition or attenuation action, and some others simultaneously reflect flood-wavetransposition and attenuation actions.