Theoretical basis to construct the models of runoff yield and runoff is explored. Runoff unit hand method corresponding to physical characters and water flow mechanism is studied.
重点是对流域产流模型结构建立的理论基础分析，流域汇流的单位线方法和流域的实际物理特性和水流运动的内部机制之间的对应关系的分析。
The uneven natural slope surface has resulted in concentrated runoff, causing the variations of velocity and increased energy of unit width discharge.
自然坡面的非均匀性导致径流集中，由此引起径流流速变化及单宽流量所具有的能量增加。
S curve, time unit hydro graph and surface runoff hydrograph can be gotten through instantaneous unit hydrograph.
由瞬时单位线推求S曲线和时段单位线，可以得到城市雨水口径流的流量过程线。
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