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水利部水文局在1955年編印的“洪水预报方法”一書中,介紹了用前期影响吸水量來表示土壤前期含水量的計算方法(见該書6、2、3節)。在这个方法中,系用經騐式子B_0=∑_0~t(P_t-R_t)K~t來計算前期影响吸水量。只要求得K值,即可据以計算B_0。
In its 1955 Flood Forecasting Method, the Hydrology Bureau of the Ministry of Water Resources introduced the method of calculating the amount of pre-soil water uptake affected by water uptake (see Section 6, 2, 3). In this method, we use the empirical formula B_0 = Σ_0 ~ t (P_t-R_t) K ~ t to calculate the initial impact of water absorption. As long as the required value of K, which can be calculated according to B_0.