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- W2012498048 abstract "A phenomenological model is described for predicting evaporation from bare and freely drained soils with a deep water table. The model delineates three classical and one transitional drying stage as the drying front advances into the soil profile. Daily evaporation is estimated from the daily potential evaporation rate e0 and depth of the drying front, Z, reached at the start of the day. The approximating relations used for calculating soil evaporation rate as a function of advancing drying front under different drying stages are presented. Input parameters of the model are simple and easily measurable under field conditions viz. daily potential evaporation rate, wilting point and field capacity moisture contents.Predictions of the model were tested using published data for cumulative evaporation. Good agreement was obtained under widely varying evaporative conditions. The model is simple and practical and may be used even for remote areas where the detailed information on soil water retention and transmission characteristics is not available.Ein einfaches Modell zur Vorhersage der Evaporation bracher BodenEin phanomenologisches Modell zur Vorhersage der Evaporation bracher, frei dranender Boden mit tiefem Grundwasserstand wird vorgestellt. Das Modell erfast im Zuge des Vorruckens der Austrocknungsfront in das Bodenprofil hinein drei “klassische” Stadien und ein Ubergangs-Austrocknungsstadium. Die tagliche Evaporation wird ermittelt aus taglicher potentieller Evaporation e0 und der Tiefe Z der Austrocknungsfront zu Tagesbeginn. Die naherungsweisen Beziehungen zur Ermittlung der Boden-Evaporationsrate als Funktion der vorruckenden Austrocknungsfront in den unterschiedlichen Austrocknungsstadien werden angegeben. Die Eingabegrosen fur das Modell sind einfach und fur Feldbedingungen leicht erhaltlich: die tagliche potentielle Evaporationsrate, der Welkepunkt und die Feldkapazitat.Die Modell-Vorhersagen wurden anhand von publizierten Daten fur die kumulative Evaporation getestet. Gute Ubereinstimmung ergab sich fur stark variierende Evaporationsbedingungen. Das Modell ist einfach und praktisch und kann auch fur weit entfernte Gegenden eingesetzt werden, in denen detaillierte Informationen uber Bodenwasser-Retention und Durchlassigkeits-Charakteristiken nicht erhaltlich sind." @default.
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- W2012498048 date "1992-01-01" @default.
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- W2012498048 title "A Simple Model for Predicting Evaporation from Bare Soils" @default.
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