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Title: Estimation of soil evaporation in an irrigated vineyard from soil surface temperature
Contributor(s): Kerridge, Belinda L (author); Hornbuckle, John  (author); Christen, Evan W (author); Faulkner, Richard D  (author)
Publication Date: 2012
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Abstract: Soil evaporation is a significant unproductive loss of water that needs to be and can be managed in irrigated systems. A method is used to estimate soil evaporation based upon soil surface temperature change between a saturated and drying soil. The relative evaporation (RE) method of Ben-Asher et al. (1983) was deployed. Soil surface temperature in a drip irrigated vineyard was collected using infra-red temperature sensors. Average daily soil evaporation under-vine was between 0.6mm and 1.8mm and between 0.7mm and 2.5mm for the inter-row. Evaporation from the soil is an important part of the water balance of a crop (Burt et al. 2005). Previous estimates vary widely, from 30-65% of evapotranspiration (Kerridge et al 2008a). The Ben-Asher et al. (1983) method allows potential soil evaporation to be estimated from the daily latent fluxes of a saturated, steady-state dry and a drying soil. By calculating a relative evaporation (RE) factor and multiplying it by an estimate of potential evaporation, determined for example by the FAO-56 procedure (Allen et al., 1998), an estimate of soil evaporation may be made. The main benefit of this method is that it allows rapid and simultaneous estimates of evaporative flux to be measured at numerous sites under study. This can then be linked with methods for spatial estimation of plant water use and stress (Hornbuckle et al., 2008b).
Publication Type: Conference Publication
Conference Name: Irrigation Australia 2012 Conference and Trade Show, Adelaide, Australia, 24th - 29th June, 2012
Conference Details: Irrigation Australia 2012 Conference and Trade Show, Adelaide, Australia, 24th - 29th June, 2012
Source of Publication: Irrigation Australia Conference Papers and Presentations (Horticulture), p. 1-2
Publisher: Irrigation Australia
Place of Publication: online
Field of Research (FOR): 070108 Sustainable Agricultural Development
Socio-Economic Outcome Codes: 960905 Farmland, Arable Cropland and Permanent Cropland Water Management
HERDC Category Description: E2 Non-Refereed Scholarly Conference Publication
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