Sloan 13 gave an example to explain some shortages of a single - valued storage - discharge function q asb 14 by applying this model in a river basin . the single - valued stor - age - discharge models are usually called steady or quasi - steady models . one of the most widely used models which includes a quasi - steady state represen - tation of subsurface flow is topmodel 15 19 Sloan 13具体举例说明一种典型的稳定状态下的地下径流机制q asb 14以及应用广泛的“拟稳定”状态下的topmodel 15 19机制在这个方面模拟的缺陷性