Salah Er-Raki

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This study was performed to test three methods based on the FAO-56 ‘‘dual’’ crop coefficient approach to estimate actual evapotranspiration (AET) for winter wheat under different irrigation treatments in the semi-arid region of Tensift Al Haouz, Marrakech (center of Morocco). The three methods differ in the calculation of the basal crop coefficient (Kcb)(More)
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)
CHEHBOUNI A.1, R. ESCADAFAL 1, B. DUCHEMIN1, G. BOULET1, V. SIMONNEAUX1, G. DEDIEU1, B. MOUGENOT1, S. KHABBA2, H. KHARROU3, PH. MAISONGRANDE1, O. MERLIN1, A. CHAPONNIERE1, J. EZZAHAR2, S. ER-RAKI2, J. HOEDJES1, R. HADRIA2, A. ABOURIDA2, A. CHEGGOUR2, F. RAIBI2, A. BOUDHAR2, I. BENHADJ 1, L. HANICH2 , A. BENKADDOUR2 , N. GUEMOURIA2, AH. CHEHBOUNI2, A.(More)
The aim of this study was to combine the FAO-56 dual approach and remotely-sensed data for mapping water use (ETc) 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)
Data disaggregation (or downscaling) is becoming a recognized modeling framework to improve the spatial resolution of available surface soil moisture satellite products. However, depending on the quality of the scale change modeling and on the uncertainty in its input data, disaggregation may improve or degrade soil moisture information at high resolution.(More)
Due to their image-based nature, “contextual” approaches are very attractive to estimate evapotranspiration (ET) from remotely-sensed land surface temperature (LST) data. Their application is however limited to highly heterogeneous areas where the soil and vegetation temperature endmembers (Tends) can be observed at the thermal sensor resolution. This paper(More)
In this study, the performance of three empirical methods for estimating reference evapotranspiration (ET0): Makkink (Mak) and PriestleyeTaylor (PT) (radiation-based) and HargreaveseSamani (HARG) (temperature-based) were assessed in semi-arid regions. The values of ET0 derived using these three methods were compared to those estimated using the reference(More)
Abstract The aim of this study was to use the FAO-56 single and dual crop coefficient approaches to estimate actual evapotranspiration (ETa) 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(More)
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 the purpose of this experiment, the irrigation of a reference plot was(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)