initial abstraction造句

As can be seen in the curve number equation, runoff cannot begin until the initial abstraction has been met.
The " initial abstraction " herein compares with Sm & minus; Si, where Si is the initial value of Sa.
It is important to note that the curve number methodology is an event-based calculation, and should not be used for a single annual rainfall value, as this will incorrectly miss the effects of antecedent moisture and the necessity of an initial abstraction threshold.
In this equation, note that the values of S _ { 0.05 } are not the same as the one used in estimating direct runoff with an I _ a / S ratio of 0.20, because 5 percent of the storage is assumed to be the initial abstraction, not 20 percent.
It's difficult to find initial abstraction in a sentence. 用initial abstraction造句挺难的