Ali Hammani

Ali Hammani
Institut Agronomique et Vétérinaire Hassan II · Génie Rural

PhD

About

52
Publications
32,666
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
724
Citations
Introduction
Ali Hammani currently works at Institut Agronomique et Vétérinaire Hassan II at the Rural Engineering Department. Ali does research in Water Science, Irrigation and Water Management. Their current project is about irrigation performances and groundwater management.
Additional affiliations
May 1992 - May 2017
Institut Agronomique et Vétérinaire Hassan II
Position
  • Professor

Publications

Publications (52)
Article
Full-text available
Despite the attention given to the water–energy–food nexus, there is little field evidence of how this plays out for irrigators. This article analyses the diversity of irrigation system configurations and their related water and energy use in semi‐arid Morocco, where groundwater‐fed and pressurized drip irrigation, although supposedly thrifty, is e...
Article
The current focus on water saving in drip irrigation projects has stifled more classical engineering debates on the relevance of different irrigation techniques for specific field conditions. We show that these debates remain important by analysing a drip irrigation project implemented in a sprinkler irrigation district in north‐west Morocco. The o...
Article
Full-text available
Le bayoud, maladie vasculaire causée par Fusarium oxysporum f. sp. albedinis, est la menace principale pour le palmier dattier au Maroc. L'effet de la solarisation et de fumigation par le metam sodium, seules ou combinées, sur les champignons telluriques en général et les Fusarium spp. en particulier, a été étudié en milieu réel. Entre 0 et 40 cm d...
Article
Full-text available
Dans un contexte de développement de l'agriculture irriguée et de surexploitation des eaux souterraines, le Maroc s'est lancé dans des processus de mise en place de contrats de nappe dans le but de responsabiliser les différents usagers et de les encourager à s'impliquer dans la gestion de ces nappes. C'est le cas pour la nappe de Berrechid où l'ag...
Presentation
Management of water resources involves a dynamic and complex system comprised of subsystems. Resilience is an important key of water resources system management assessment. Adequate description of resilience of water resource systems needs to take into account the emergent properties arising from the interaction of the component subsystems. This pa...
Article
The need for lasting returns on the large investment in state-sponsored drip irrigation projects and the ambitious objectives aimed to achieve requires thorough and continuous assessment of the performance of irrigation systems in use. However, few studies have evaluated the performance of systems once they have been installed, leading to overestim...
Article
Full-text available
Au Maroc, l’exploitation individuelle des eaux souterraines a permis le développement rapide d’une agriculture irriguée intensive. Dans la plaine de Berrechid, la ressource est limitée et surexploitée. L’agence de bassin tente depuis une dizaine d’années de mettre en place une contractualisation avec différents acteurs pour réguler les prélèvements...
Article
Full-text available
The soils of the Mediterranean Basin are the products of soil processes that have been governed by a unique convergence of highly differentiated natural and anthropogenic drivers. These soils are expected to be dramatically affected by future climate and societal changes. These changes imply that suitable adaptive management strategies for these re...
Article
Water scarcity, unequal water distribution and overexploitation make of groundwater a strategic resource to protect and preserve for future generations, particularly in arid and semi-arid regions. Groundwater governance has experienced many steps worldwide over the time. In literature, there are several research papers and reports talking about the...
Article
Full-text available
Oases in North Africa: Territorial dynamics and sustainability of farming systems. The Saharan oases experienced particularly profound and destabilizing changes in the second half of the 20th century, accompanied by social, economic, agricultural and environmental transformations. New extensions and agricultural projects have been implemented throu...
Article
Full-text available
Water is a limiting factor for the development of oasis agriculture. Water use efficiency needs to be improved by searching for different strategies of deficit irrigation. In this context, the response of date palm to these strategies was evaluated by the experimental study of the effects on the vegetative growth of mature palms cv Majhoul. The exp...
Article
Full-text available
In arid regions, water resources are extremely limited. The contribution of groundwater to satisfy crop water requirements can be very high, but is often not known. This contribution depends on the root zone environment and the water table depth. Understanding the interaction between groundwater tables and plant development is fundamental to improv...
Chapter
Full-text available
This chapter analyses the paradox of continued promotion of drip irrigation through state subsidies and donor-funded projects, on the basis of claims of water savings that are rarely backed up with evidence. Focusing on groundwater, two questions are proposed to unravel this double paradox: why is there increased pressure on groundwater resources d...
Article
Full-text available
En raison de sa bonne efficience potentielle, l’irrigation en goutte à goutte enterré (GGE) a été récemment introduite au Maroc. Ce document discute son utilisation pour le palmier dattier dans l’oasis du Tafilalet (Sud-Est duMaroc), où une conception et une gestion appropriée de ce systèmedoivent être proposées aux agriculteurs. L’objectif de l’ar...
Article
Groundwater resources in semi-arid areas and especially in the Mediterranean face a growing demand for irrigated agriculture and, to a lesser extent, for domestic uses. Consequently, groundwater reserves are affected and water-table drops are widely observed. This leads to strong constraints on groundwater access for farmers, while managers worry a...
Article
Full-text available
Abstract Much attention has been paid to the issue of groundwater depletion linked to intensive groundwater-based agriculture in (semi-)arid areas. Often referred to as the “overexploitation” of aquifers, groundwater depletion is generally attributed to the entire agricultural sector without distinguishing between different uses and users. Although...
Article
Full-text available
Abstract In the Saïss plain, the access to groundwater enabled the rapid transformation of farming systems (extension of arboriculture and horticulture) and the production of wealth. However, these changes affect only a minority of farmers who are able to access and use groundwater. This rapid agricultural development has contributed to the creatio...
Poster
Full-text available
Groundwater has become an important source of welfare in North Africa. It is redefining irrigation frontiers and supplies water to more than 500 000 farms. However, more than half of aquifers, which cater to a minority of farmers, are declining. North Africa’s groundwater economy is increasingly faced with physical and socio-economic stress.
Chapter
Full-text available
Two contrasting views prevail on groundwater use in situations of predominantly state-­‐led irrigation development. The first considers 'groundwater as liberation', i.e., how, by capturing the irrigation initiative, farmers liberated themselves from 'state' water, enabling more intensive and productive agriculture. The second view – 'groundwater as...
Article
The widespread of Information Technology tools and the increasing of data production in groundwater management allowed the development of different information systems. Even if this field requires various disciplines, organizations and authorities in charge of groundwater have often worked with operational and specific information systems focusing...
Article
Full-text available
The actual performance of drip irrigation (irrigation efficiency, distribution uniformity) in the field is often quite different from that obtained in experimental stations. We developed an approach to explain the actual irrigation performance of drip irrigation systems by linking measured performances to farmers' irrigation practices, and these pr...
Technical Report
Full-text available
Synthèse et recommandations stratégiques pour une prise en compte du risque « climat » dans les politiques et stratégies sectorielles L’adaptation au changement climatique est une question d’ordre stratégique dont dépend la trajectoire de développement des pays. Dès lors, il s’avère primordial de prendre en considération les vulnérabilités au chang...
Article
When large-scale irrigation schemes were created, establishing viable, and closely supervised, medium-sized family farms was considered essential to reap the benefits of state investments. This centralized development model was progressively dismantled, especially as farmers installed private tubewells relying less on surface water. Our aim is to a...
Article
Full-text available
Application des Systèmes d'information géographique (SIG) à la compréhension du fonctionnement des PMH : cas de Tanougha et Foum-Alanser FIGURE 24 – Irrigation gravitaire de l'olivier Compte tenu de la complexité des règle de ges-tion de l'eau et dans un objectif de modernisation du fonctionnement des périmètres irrigués de la PMH, un travail d'app...
Article
Full-text available
Les petites exploitations agricoles adoptent souvent des systèmes d'irrigation en goutte-a `-goutte simplifiés , a ` faible coût , au lieu des systèmes sophistiqués promus convention-nellement. Nous e ´tudions ici les processus d'adoption du goutte-a `-goutte a ` travers des initiatives locales ou des programmes e ´tatiques dans les exploitations d...
Article
Full-text available
Irrigated agriculture in North Africa relies more and more on groundwater use, even within large-scale irrigation schemes served by surface water. In a context of complex and rapidly evolving land tenure systems, farmers access groundwater through informal local arrangements using "illicit" tubewells. We analyzed the importance of these arrangement...
Conference Paper
Full-text available
Subsurface drainage is a current of irrigated agriculture under arid and semi arid climates. Most of Magherb (Maroc, Tunisia, Algeria) large schemes have been installed in the 70-80's. These three countries are preparing "green plans" meaning plans for agriculture intensification and promotion of irrigation re-engineering for both existing and futu...
Article
Full-text available
In many countries, farmers are turning to groundwater to make up for surface water scarcity and to deal with increasing water demand, even inside large-scale irrigation schemes. In many situations, this leads to the mining of groundwater resources, which in turn threatens the sustainability of the farms that depend on this resource. The purpose of...
Article
We designed and implemented an action-research programme in large-scale irrigation schemes in Algeria, Morocco and Tunisia, aiming to develop a regional network of competences by conducting research, training and development activities, and involving local actors. We worked on three issues: (i) the sustainability of North Africa's growing groundwat...
Article
The Gharb plain in Morocco suffers from water excess in winter and from water deficit during the spring and summer. This explains the low profitability of the investments in irrigation agreed by the Moroccan state and low yields of winter crops. Furrow irrigation systems may be a way to increase water productivity by improving the surface drainage...
Article
Full-text available
This paper focuses on the evaluation of a participatory approach aimed at supporting groups of small-scale farmers in the design of joint drip irrigation projects. Our idea was to create a sustainable social learning environment in which they could acquire adaptive knowledge about new irrigation technology and about designing and managing a joint i...
Article
Full-text available
In the Tadla irrigation perimeter, farmers supplement their irrigation supplies with groundwater, leading to water table depletion in the area. An additional concern is the deteriorating water quality in the area. There is no regulation to control withdrawals of groundwater, and no data are available to quantify groundwater use. The paper demonstra...
Article
Full-text available
Après la libéralisation des assolements, les superficies emblavées en luzerne dans le périmètre irrigué du Tadla ont connu une nette augmentation. Elles sont passées de 12 000 ha en 1990 à 24 000 ha en 2006 alors que les dotations en eau de surface de la luzerne à l'échelle du périmètre n'ont connu aucune évolution significative. Pour satisfaire ce...
Article
Full-text available
La plaine du Gharb présente une double problématique, celle des excès d’eau en hiver qui mettent en péril les levées et les premières phases des cycles culturaux et, à partir du printemps, celle du déficit en eau qui nécessite le recours à l’irrigation pour garantir un niveau de rendement acceptable. La valorisation de l’eau d’irrigation est en con...
Article
Full-text available
Accurate estimations of Actual Evapotranspiration (ETa) are a prerequisite for optimal irrigation scheduling. Quantification of ETa at critical growth stages can be used to avoid water stress in crops. For large irrigated areas, remote sensing techniques are important tools for ETa assessments. This paper describes the application of a simplified r...
Article
Full-text available
AUTHORS' NOTE: The authors would first like to thank the Moroccan facilitators, Ahmed Eliamani and Younes Bekkar, for the quality of their intervention in this study. We also wish to thank Bettina Bluemling for her valuable contribution in the evaluation of the role-playing game sessions. We are also very grate-ful to Pieter Bots for his constructi...
Article
Full-text available
La place des ressources en eau souterraine dans le Tadla est passée d’une situation où elles comblaient les déficits en eau de surface à une situation où elles jouent un rôle primordial dans la dynamique agricole. En effet, après la date de mise en oeuvre de la politique de désengagement et de libéralisation des assolements les exploitations agrico...
Article
Full-text available
La reconversion de l'irrigation gravitaire vers l'irrigation localisée a connu un certain engouement au Maroc. Fin 2006, les agriculteurs marocains auraient équipé environ 141 570 ha en irrigation localisée (figure 1), soit 9,7% de la superficie totale aménagée, selon les chiffres du Ministère de l'Agriculture, du Dévelop-pement Rural et des Pêches...
Article
Full-text available
The CRIWAR computer model for the calculation of crop water requirements was extended with a new strategy module. It is designed to follow two sub-strategies in an irrigated command area. The first one is based on (irrigation) water requirements of the irrigable area and the second one on the water balance of the gross command area for a sustainabl...
Article
Full-text available
Small scale farmers from the Tadla irrigation scheme are facing profound environmental, institutional and socio-economic changes. The water resources are becoming scarce, the Moroccan State leads a policy in favour of its disengagement from the management of the big irrigation schemes and the markets are getting free (free-trading). The transition...
Article
Full-text available
L’importance des ressources en eau souterraine dans le périmètre irrigué de Tadla a été révélée pendant les années de sécheresse de 1981 à 1984 lorsqu’elles ont permis de combler le déficit en eau de surface. Depuis cette date, le recours à l’eau souterraine est devenu systématique compte tenu du contexte de pénurie d’eau de surface que connaît act...
Article
Full-text available
La plaine du Gharb s'étend sur une superficie totale d'environ 616 000 ha avec un potentiel irrigable de 250 000 ha. La superficie équipée actuellement en grande hydraulique est d'environ 114 000 ha et 86 000 ha irrigués par pompage privé. La mise en valeur de la plaine est entravée par l’excès d’eau hivernal compte tenu de la nature subhumide de s...
Article
Full-text available
Le périmètre irrigué du Tadla est passé par deux grandes périodes quant à l’évolution de la disponibilité des ressources en eaux. Cette évolution peut être attribuée aux changements intervenus dans la disponibilité de l’eau de surface (diminution des précipitations) et une évolution de la demande en eau (intensification culturale, assolements). La...
Article
Full-text available
Dans la plaine du Gharb, le plus important périmètre du Maroc est aménagé en grande hydraulique sur 107 000 ha, dont 87 000 ha en irrigation gravitaire et 19 700 ha en irrigation par aspersion. L’irrigation gravitaire, technique la plus ancienne, occupe une place importante, car elle est moins complexe à mettre en oeuvre et moins exigeante en moyen...
Article
Full-text available
A la suite de plusieurs épisodes de sécheresses et de la libéralisation des assolements au Maroc, les deux dernières décennies ont vu le développement massif de stations de pompage dans les périmètres irrigués du Tadla (la dotation est de 131 millions de m3 dans le périmètre du Béni Amir en 2001-2002, pratiquement la moitié de la période 1978-2002)...
Article
Full-text available
Les sécheresses des années 80 et 90 et la libéralisation des assolements ont incité les agriculteurs du périmètre irrigué du Tadla au Maroc d'avoir recours massivement à l'eau souterraine pour améliorer la disponibilité de l'eau à travers des puits et forages. Malgré une forte diminution de la dotation en eau de surface dans le périmètre des Beni A...
Article
Full-text available
The Gharb plain in Morocco faces both problems of excesswinter rainfall and salinity hazards due to a shallow,permanent and saline groundwater. A large area of 80.000 hahas been equipped with subsurface drains out of a totalplanned area of 200.000 ha. This system has been designedwithout any local references and has encountered severalmaintenance p...
Article
Full-text available
La mise en valeur du périmètre irrigué du Gharb, qui est l'un des plus importants du Maroc, est entravée par des problèmes de drainage liés à des engorgements des sols dus aux excès d'eau de pluie d'hiver, à la faible perméabilité des sols et à l'absence de drainage naturel. Un réseau de drainage souterrain a été installé pour remédier à ces problè...

Network

Cited By

Projects

Projects (2)