Effects of Decreasing Soil Water Content on Evaporation under Saline and Non-Saline Conditions
Küçük Resim Yok
Tarih
2006
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Univ Namik Kemal
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Evaporation changes in mechanism and magnitude as the soil dries. Evaporation are closely related to the soil moisture. Penman's method is used most widely to define the upper boundary condition in computing evaporation from a relatively wet bare soil surface. It assumes saturated vapour pressure at the soil surface and calculates potential evaporation independent of the soil water content. It was modified by Staple (1974) including in it the soil's relative humidity of partially dried surface to predict evaporation from drying soils. The objective of this study was to investigate the rate of evaporation under aerodynamic (in door) and aerodynamic + radiation (out door) conditions for saline and non saline drying soil surface using Staple modified Penman equation seeking for further improvements. Soil samples (clayey) were first saturated with fresh and saline (16 dS/m) water and then exposed to evaporation. Generally, the agreements between simulated and measured rates for out/indoor conditions were good (R-2 = 0.90). However more deviation occurred at the beginning and the final stage, attributable to the difference in soil surface and air temperature. While the model calculated roughly the same rates for saline and non-saline conditions, the effect of soil texture is accounted by defining matric potential-water content and soil relative humidity-water content relationships.
Açıklama
Anahtar Kelimeler
Penman, Drying Soil, Water Content, Salinity, Evaporation, Bare-Soil, Equation
Kaynak
Journal Of Tekirdag Agriculture Faculty-Tekirdag Ziraat Fakultesi Dergisi
WoS Q Değeri
N/A
Scopus Q Değeri
Cilt
3
Sayı
2
