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Author: Boureima Ousmane
Publisher:
ISBN:
Category :
Languages : fr
Pages : 123
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Book Description
ETUDE DES RESSOURCES EN EAU DES FORMATIONS CRISTALLINES DU SOCLE DANS LA REGION DE ZINDER. PROPRIETES PHYSICO-CHIMIQUES ET HYDROCHIMIE DES EAUX
Author: Boureima Ousmane
Publisher:
ISBN:
Category :
Languages : fr
Pages : 123
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Book Description
ETUDE DES RESSOURCES EN EAU DES FORMATIONS CRISTALLINES DU SOCLE DANS LA REGION DE ZINDER. PROPRIETES PHYSICO-CHIMIQUES ET HYDROCHIMIE DES EAUX
Author: Moussa Boukari
Publisher:
ISBN:
Category :
Languages : fr
Pages : 131
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Author: Moussa Boukari
Publisher:
ISBN:
Category : Groundwater
Languages : fr
Pages : 73
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Author: I. Simmers
Publisher: Springer Science & Business Media
ISBN: 9401577803
Category : Science
Languages : en
Pages : 503
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Book Description
In view of the rapidly expanding urban, industrial and agri cultural water requirements in many areas and the normally associated critical unreliability of surface water supplies in arid and semi-arid zones, groundwater exploration and use is of fundamental importance for logical economic development. Two interrelated facets should be evident in all such groundwater projects : (a) definition of groundwater recharge mechanisms and characteristics for identified geological formations, in order to determine whether exploitation in the long-term involves 'mining' of an es sentially 'fossil' resource or withdrawal from a dynamic supply. A solution to this aspect is essential for development of a re source management policy: (b) determination of recharge variability in time and space to thus enable determination of total aquifer input and to quantify such practical aspects as 'minimum risk' waste disposal locations and artificial recharge potential via (e.g.) devegetation or engi neering works. However, current international developments relating to natural recharge indicate the following 'problems' ; no single comprehensive estimation technique can yet be iden tified from the spectrum of methods available; all are reported to give suspect results.
Author: Mohamed-Said Bennabi
Publisher:
ISBN:
Category :
Languages : fr
Pages : 156
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La vallée de l'Oued Sahel Soummam, dépression située à l'Est du domaine de l'Atlas tellien est une zone très complexe formée d'une superposition de nappes d'épaisseur relativement faible par rapport à leur extension. La carte géomorphologique des formations quaternaires met en évidence quatre terrasses alluviales très inégalement réparties sur les deux rives de l'Oued. L'étude des données hydroclimatologiques, dont la pluviométrie, l'évapotranspiration et le ruissellement ont permis de tenter l'établissement d'un bilan hydrologique. Les données de l'étude géophysique complétée par la description de quelques forages mécaniques, donnent une estimation sur le volume du réservoir aquifère formé aussi bien par les alluvions quaternaires que par le miocène conglomératique. L'étude piézométrique a montré deux directions principales d'écoulement avec peu de variations dans l'allure générale de la surface piézométrique entre deux période de mesures. Les résultats d'interprétation des essais de pompage ont permis de déterminer les caractéristique hydrodynamiques (T et S) qui sont ensuite utilisées dans l'estimation des réserves de la zone étudiée. L'étude physico-chimique des eaux a montré deux types de faciès chimiques dominants : bicarbonate calcique en rive gauche et chlorure sodique en rive droite. La minéralisation des eaux augmente dans le sens de l'écoulement et particulièrement dans la zone du "verrou" de Takrietz où ce phénomène est accentué par l'effet de l'évaporation plus importante à ce niveau
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 1658
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Author: Albert Kikietta (auteur d'une thèse de sciences.)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 294
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Author: Michel Défossez
Publisher:
ISBN:
Category :
Languages : fr
Pages : 454
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Author: Segun Adelana
Publisher: CRC Press
ISBN: 0415452732
Category : Science
Languages : en
Pages : 520
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Book Description
Groundwater is Africa’s most precious natural resource, providing reliable water supplies for many people. Further development of groundwater resources is fundamental to increasing access to safe water across the continent to meet coverage targets and reduce poverty. There is also an increasing interest in the use of groundwater for irrigated agriculture as the climate becomes more variable. Sustainable development of the resource is not a trivial task and depends crucially on an understanding of the hydrogeology and people with the skills to make informed decisions on how groundwater can best be developed and managed in a sustainable fashion. Despite these obvious needs, however, little attention has been paid to the systematic gathering of information about groundwater resources in the past few decades, with the result that data are patchy, knowledge is limited and investment is poorly targeted. This book was written to start to bridge the knowledge gap. The 29 chapters are written by a combination of practitioners and researchers mainly from within Africa using experience from recent and ongoing projects. The chapters highlight the complexity and variety of issues surrounding the development and management of groundwater resources across Africa, and provide a snapshot of groundwater research and application in the early 21st century. Chapters range from strategic discussions of the role of groundwater in development and poverty reduction, to case studies on techniques used to develop groundwater, and modelling methods for managing groundwater systems.
Author: Sidi Mohammed Hayane
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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