一、單位綫的定义及其基本假定的实質 單位綫的定义是:在一已知流域,由于一个單位时段內一个單位深度的有效降雨(即淨雨)所產生的流域出口断面的地面徑流过程綫称为單位线。蕭曼(L.K.Sherman)在孟然(Meinzer)主編的水文学的第十一章中写道;單位綫法承認了下述的事实: 1.洪峰流量及其他任一时刻的流量在实質上受到暴雨期間降水强度变化的影响,暴雨期間簡單的 1. The definition of unit line and its basic assumption The definition of a substantial unit line is that in a known catchment, the surface runoff at the outlet section of the catchment due to the effective rainfall (ie, net rain) at a unit depth per unit time The process line is called a unit line. LKSherman writes in Chapter 11 of Meinzer’s hydrology: the unit-line approach recognizes the fact that: 1. The peak flow and the flow at any other moment in time are essentially Affected by changes in precipitation intensity during rainstorms, simple during heavy rains