土壤蒸发的计算

ON THE CALCULATION OF EVAPORATION FROM SOIL

中文摘要:

      本文根据对土壤蒸发过程的物理考虑和量纲分析,推导了适用于计算各阶段土壤蒸发的普遍公式.计算值与实际观测资料相比较,结果相当良好.

英文摘要:

      If E is the evaporation from soil,E₀ the evaporative power and Q the possible maximum amount of water which may be supplied by soil for evaporation during given period,we may consider that ∂E/∂E₀ and ∂E/∂Q are some founctions of Q,E₀ and E viz ∂E/∂E₀=F(Q,E₀,E),∂E/∂Q=ФF(Q,E₀,E).Assuming E=E₁+E₂,F(Q,E₀,E)=F₁(Q,E₀,E₁)+F₂(Q,E₀,E₂)and Ф(Q,E₀,E)=Ф₁(Q,E₀,E₁)+Ф₂(Q,E₀,E₂),we get Eqs.(9)and (10).By applying dimensional analysis and the theory of differential equation we have shown that the forms of F_i and Ф_i(i=1,2) are Eqs.(15),and hence derived formula (34).The relationship between E/E₀ and w computed by formula(34) is shown in figure 2,it is in good agreement with the measurement by Popof-evaporation gauge.