recession limb meaning in English

过程线下降段
退水曲线

Through examination of the recession limbs of the observed hydrographs , during periods with no rain and thus no surface runoff , one can determine the value of . for this catchment , a value of 0 . 8 is obtained . the simulated subsurface runoff at each grid is routed to the outlets through a unit - hydrograph method for overland flow and the linear saint - venant equation for channel flow to get the discharge at xixian station
对所研究的流域而言,经过估算消退系数为0 . 8 .耦合着这两种不同地下径流机制的clm模型都可以计算出每个网格的地表地下径流深,采用dag lohman 34 , 35发展的汇流模型进行汇流由于是研究地下径流,所以取每个网格的地表径流为0 ,该模型采用单位线计算坡面汇流线性圣维南saint - venant equation进行河道汇流