NDLI: A geostatistical methodology to estimate the base of the Trifa aquifer (Morocco) with limited drilling and geo-electrical sounding data

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Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur : Volume 63, Issue 4, December 2004

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A geostatistical methodology to estimate the base of the Trifa aquifer (Morocco) with limited drilling and geo-electrical sounding data

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A geostatistical methodology to estimate the base of the Trifa aquifer (Morocco) with limited drilling and geo-electrical sounding data

Content Provider	Springer Nature Link
Author	Houcyne, El Idrysy, El Smedt, Florimond
Copyright Year	2004
Abstract	The paper presents the methodology used to estimate the base and thickness of the Trifa aquifer, north-east Morocco, from very limited drilling and geoelectrical sounding data. The methodology is applicable where the aquifer is a single horizon with considerable lateral variation. The procedure is based on geostatistical techniques: kriging of apparent resistivities, calibration of the resistivities with information from drilling, co-kriging of resistivities and estimation of the thickness of the aquifer by inverting the apparent resistivity formula. Calculated and measured substratum levels are obtained by subtracting the estimated and measured thickness from the topography at the drilling and geo-electrical sounding locations. By co-kriging the estimated substratum levels with the measured values in the drilling locations, a map of the substratum over the plain was prepared.L’article présente la méthodologie utilisée pour évaluer la cote du mur et l’épaisseur de l’aquifère de Trifa, au nord-est du Maroc, à partir d’un nombre très limité de données de forage et de sondages électriques. Cette méthodologie est applicable lorsque l’aquifère concerne une formation unique présentant d’importantes variations latérales. L’approche repose sur l’utilisation des techniques géostatistiques : kriegeage des résistivités apparentes, calage des résistivités sur les données des forages, co-krigeage des résistivités et évaluation de l’épaisseur de l’aquifère par inversion de la formule de la résistivité apparente. Les valeurs de la cote, calculées et mesurées, du substratum au droit des forages et des sondages électriques, sont obtenues en soustrayant les épaisseurs, calculées et mesurées, de la cote de la surface topographique. On a préparé une carte du substratum en co–krigeant les valeurs évaluées du substratum avec celles mesurées dans les forages.
Starting Page	345
Ending Page	351
Page Count	7
File Format	PDF
ISSN	14359529
Journal	Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Volume Number	63
Issue Number	4
e-ISSN	14359537
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-06-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Co-krigeage Sondage électrique Géostatistique Aquifère de Trifa
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology

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A geostatistical methodology to estimate the base of the Trifa aquifer (Morocco) with limited drilling and geo-electrical sounding data

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