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24 The main goal of this research was to evaluate the potential of the dual approach of 25 FAO-56 for estimating actual crop evapotranspiration (AET) and its components (crop 26 transpiration and soil evaporation) of an olive (Olea europaea L.) orchard in the semi arid 27 region of Tensift-basin (central of Morocco). Two years (2003 and 2004) of continuous(More)
abstract In this study, the performance of three empirical methods for estimating reference evapotranspiration (ET 0): Makkink (Mak) and PriestleyeTaylor (PT) (radiation-based) and HargreaveseSamani (HARG) (temperature-based) were assessed in semi-arid regions. The values of ET 0 derived using these three methods were compared to those estimated using the(More)
1. Introduction Within the arid and semi-arid regions, water availability is a major limitation for crop production. The Haouz plain that surrounds the city of Marrakech (Center of Morocco) is classified among regions with scarce water resources (Pascon, 1977). In recent years, due to the combined effect of drought and the increase of irrigated surfaces,(More)
Recent efforts have been concentrated in the development of models to understand and predict the impact of environmental changes on hydrological cycle and water resources in arid and semi-arid regions. In this context, remote sensing data have been widely used to initialize, to force or to control the simulations of these models. However, for several(More)
The aim of this study was to combine the FAO-56 dual approach and remotely-sensed data for mapping water use (ET c) in irrigated wheat crops of a semi-arid region. The method is based on the relationships established between Normalized Difference Vegetation Index (NDVI) and crop biophysical variables such as basal crop coefficient, cover fraction and soil(More)
The aim of this study was to use the FAO-56 single and dual crop coefficient approaches to estimate actual evapotranspiration (ET a) over an irrigated citrus orchard under drip and flood irrigations in Marrakech, Morocco. The results showed that, by using crop coefficients suggested in the FAO-56 paper, the performance of both approaches was poor for two(More)
In irrigation schemes under rotational water supply in semi-arid region, the water allocation and irrigation scheduling are often based on a fixed-area proportionate water depth with every irrigation cycle irrespective of crops and their growth stages, for an equitable water supply. An experiment was conducted during the 20042005 season in Haouz irrigated(More)
† Those authors are also members of the LMI TREMA laboratory. Abstract: This paper describes the setting and results of a real-time experiment of irrigation scheduling by a time series of optical satellite images under real conditions, which was carried out on durum wheat in the Haouz plain (Marrakech, Morocco), during the 2012/13 agricultural season. For(More)