SIMETAW# - a Model for Agricultural Water Demand Planning

Noemi Mancosu (), Donatella Spano, Morteza Orang, Sara Sarreshteh and Richard Snyder

Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), 2016, vol. 30, issue 2, 557 pages

Abstract: A successful water management scheme for irrigated crops requires an integrated approach, which accounts for water, soil, and crop management. SIMETAW# is a user friendly soil water balance model that assesses crop water use, irrigation requirements, and generates hypothetical irrigation schedules for a wide range of crops experiencing full or deficit irrigation. SIMETAW# calculates reference evapotranspiration (ET o ), and it computes potential crop evapotranspiration (ET c ), and the evapotranspiration of applied water (ET aw ), which is the amount of irrigation water needed to match losses from the effective soil root zone due to ET c that are not replaced by precipitation and other sources. Using input information on crop and soil characteristics and the distribution uniformity of infiltrated irrigation applications in full or deficit conditions, the model estimates the mean depth of infiltrated water (IW) into each quarter of the field. The impact of deficit irrigation on the actual crop evapotranspiration (ET a ) is computed separately for each of the four quarters of the cropped field. SIMETAW# simulation adjusts ET o estimates for projected future CO 2 concentration, and hence the model can assess climate change impacts on future irrigation demand allowing the user to propose adaptation strategies that potentially lead to a more sustainable water use. This paper discusses the SIMETAW# model and evaluates its performance on estimating ET c , ET a , and ET aw for three case studies. Copyright Springer Science+Business Media Dordrecht 2016

Keywords: Soil water balance; Crop coefficient; Crop water requirement; Evapotranspiration of applied water; Yield reduction; Adaptation strategies (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1007/s11269-015-1176-7

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