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Title of Journal: Hydrogeol J

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Abbravation: Hydrogeology Journal

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Springer-Verlag

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DOI

10.1016/0169-328x(95)00138-i

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1435-0157

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Estimation of aquifer hydraulic parameters from su

Authors: Usama Massoud Fernando Santos Mohamed A Khalil Ayman Taha Abbas M Abbas
Publish Date: 2009/11/26
Volume: 18, Issue: 3, Pages: 699-710
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Abstract

The integration of geophysical data with direct hydrogeological measurements can provide a minimally invasive approach to characterize the subsurface at a variety of resolutions and over many spatial scales The field of hydrogeophysics has attracted much attention during the last two decades In this domain the geophysical data inverted to geophysical models are interpreted in terms of the hydrogeology to serve as a basis for the definition of hydraulic models in the areas of interest The hydraulic conductivity K value measured in a reference borehole has been combined with the electrical conductivity obtained from nearby geoelectromagnetic sounding data in the Cenomanian Upper Cretaceous aquifer central Sinai Egypt The resulting relation was interpreted with Dar Zarrouk parameters to infer the transmissivity variations at other vertical electrical sounding locations where K values are unknown Coincident transient electromagnetic data have been adopted to increase accuracy while interpreting the aquifer geoelectrical properties The results indicate that the transmissivity values in the aquifer of interest vary from 2446 to 9694 m2/day and K varies from 129 to 570 m/day throughout the studied areaL’incorporation de données géophysiques aux mesures hydrogéologiques directes peut fournir une approche influencée de façon marginale pour caractériser l’eau de subsurface avec une variété de résolutions et à de nombreuses échelles spatiales Le champ de l’hydrogéophysique a suscité beaucoup d’intérêt durant les deux dernières décades Dans ce domaine les données géophysiques adaptées aux modèles géophysiques sont interprétées en termes d’hydrogéologie afin de servir de base à la définition de modèles hydrauliques dans les zones concernées La valeur de la conductivité hydraulique K mesurée dans un forage de référence a été associée à la conductivité électrique obtenue de données de carottages géoélectromagnétiques voisins dans l’aquifère Cénomanien Crétacé Supérieur Sinai central Egypte La relation qui en résulte a été interprétée avec les paramètres Dar Zarrouk afin d’en déduire les variations de transmissivité à d’autres emplacements de carottages électriques verticaux où les valeurs de K ne sont pas connues Des données électromagnétiques transitoires qui coïncident ont été adoptées afin d’accroître la précision lors de l’interprétation des propriétés géoélectriques de l’aquifère Les résultats montrent que les valeurs de transmissivité dans l’aquifère concerné varient de 2446 à 9694 m2/jour et que K varie de 129 à 570 m/jour dans toute la région étudiéeLa integración de datos geofísicos con medidas hidrogeológicas directas puede proveer un método mínimamente invasivo para caracterizar el subsuelo en un amplio rango de resoluciones y en muchas escalas espaciales El campo de la hidrogeofísica ha atraído mucho la atención durante las dos últimas décadas En este dominio los datos geofísicos introducidos a modelos geofísicos se interpretan en términos de la hidrogeología para servir como una base para la definición de modelos hidráulicos en las áreas de interés El valor de la conductividad hidráulica K medida en una perforación de referencia ha sido combinada con la conductividad eléctrica obtenida a partir de datos de sondeos geoelectromagnéticos próximos en el acuífero Cenomaniano Cretácico superior en el Sinai central Egipto La relación resultante fue interpretada con los parámetros de Dar Zarrouk para deducir las variaciones de transmisividad de sondeos eléctricos verticales en otros sitios donde los valores de K son desconocidos Los datos electromagnéticos transitorios coincidentes han sido adoptados para incrementar la precisión al mismo tiempo que se interpretan las propiedades geoeléctricas del acuífero Los resultados indican que los valores de transmisividad en el acuífero de interés varían de 2446 a 9694 m2/día y K varía desde 129 a 570 m/día a través del área estudiada摘要地球物理数据和直接水文地质测量联用是一种能在多种分辨率和空间尺度上描述地下特征的微创方法。在过去二十年间水文地球物理技术受到了广泛关注。该技术将地球物理数据转化为地球物理模型并且给出水文地质解释作为建立研究区水动力模型的基础。将参考钻孔中测得的渗透系数K值与附近埃及西奈中部Cenomanian上白垩系含水层地球电磁测深所获的电导率结合用Dar Zarrouk参数来解译所得到的关系从而推测K值未知时其它垂向电测深点的导水系数变化。在解释含水层的地电性质时用重叠瞬变电磁数据来提高准确度。结果表明对于整个研究区含水层的导水系数为2446 ∼ 9694 m2/dK值的变化范围是129 ∼ 570 m/d。A integração dos dados geofísicos com medições hidrogeológicas directas pode proporcionar uma abordagem minimamente invasiva para a caracterização do subsolo numa variedade de resoluções e sobre inúmeras escalas espaciais O campo da Hidrogeofísica tem atraído muita atenção durante as últimas duas décadas Neste domínio os dados geofísicos invertidos para modelos geofísicos são interpretados em termos da hidrogeologia para servir como base para a definição de modelos hidráulicos nas áreas de interesse O valor da condutividade hidráulica K medido num poço de referência foi associado com a condutividade eléctrica obtida a partir de dados obtidos em sondagens geoelectromagnéticas próximas no aquífero Cenomaniano Cretácico Superior Sinai central Egipto A relação resultante foi interpretada com os parâmetros Dar Zarrouk para inferir as variações da transmissividade noutros locais dispondo de sondagens eléctricas verticais onde os valores de K são desconhecidos Os dados electromagnéticos transitórios coincidentes foram adoptados para aumentar a precisão ao interpretar as propriedades geoeléctricas do aquífero Os resultados indicam que os valores de transmissividade do aquífero interessado variam de 2446 a 9694 m2/dia e K varia de 129 a 570 m/dia em toda a área estudadaThe authors are grateful to the Managing Editor Prof Philippe Renard and three anonymous reviewers for their constructive criticism fruitful discussion and precise editing which enhanced and benefited this manuscript Our deep appreciation is extended to the HJ technical editorial team Sue Hunter and Sue Duncan and administration officer Susanne Schemann for their great efforts and kind responses during the processing of the manuscript


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