Combined Schlumberger and dipole-dipole array for hydrogeologic applications

Apostolopoulos, G

dc.contributor.author	Apostolopoulos, G	en
dc.date.accessioned	2014-03-01T01:28:03Z
dc.date.available	2014-03-01T01:28:03Z
dc.date.issued	2008	en
dc.identifier.issn	0016-8033	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18683
dc.subject.classification	Geochemistry & Geophysics	en
dc.subject.other	Chemical reactions	en
dc.subject.other	Diagnostic radiography	en
dc.subject.other	Groundwater	en
dc.subject.other	Landforms	en
dc.subject.other	Medical imaging	en
dc.subject.other	Tomography	en
dc.subject.other	Dipole-dipole	en
dc.subject.other	Field testing	en
dc.subject.other	Gridding	en
dc.subject.other	Lateral variations	en
dc.subject.other	Layered Structures	en
dc.subject.other	Phyllite	en
dc.subject.other	Resistivity tomography	en
dc.subject.other	Schlumberger	en
dc.subject.other	Sedimentary basins	en
dc.subject.other	Subsurface information	en
dc.subject.other	Vertical strips	en
dc.subject.other	Hydrogeology	en
dc.subject.other	hydrogeology	en
dc.subject.other	limestone	en
dc.subject.other	numerical method	en
dc.subject.other	numerical model	en
dc.subject.other	phyllite	en
dc.subject.other	sedimentary basin	en
dc.subject.other	subsurface flow	en
dc.subject.other	Crete	en
dc.subject.other	Eurasia	en
dc.subject.other	Europe	en
dc.subject.other	Greece	en
dc.subject.other	Southern Europe	en
dc.title	Combined Schlumberger and dipole-dipole array for hydrogeologic applications	en
heal.type	journalArticle	en
heal.identifier.primary	10.1190/1.2950032	en
heal.identifier.secondary	http://dx.doi.org/10.1190/1.2950032	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	A novel approach to 2D resistivity sounding, called combined Schlumberger and dipole-dipole (CSDD) sounding, probes the subsurface both vertically and diagonally. It transforms the dipole-dipole values to Schlumberger values using the Patella method. Gridding then creates an apparent-resistivity section in which vertical variations are inferred from the Schlumberger values and lateral variations are inferred from the dipole-dipole values. The section is inverted by the Zohdy 1D method to vertical strips. The resulting 2D resistivity model of the subsurface identifies the layers and their dips. We tested the ability of the CSDD method to delineate a layered structure by comparing the method's response to a model and then by a field test at a site where we have some degree of subsurface information from a resistivity tomography profile. Finally, we used this new CSDD sounding for hydrogeologic applications in the Agia Valley on Crete, Xylokastron City, and Skyros Island in Greece. The CSDD soundings map formations and interfaces at various depths and dips, including a phyllite-limestone interface and marl with overlying conglomerate. It also maps circulation, supply, and salinization of groundwater. In all cases, we find that CSDD sounding can detect the layers and their dips in sedimentary basins. © 2008 Society of Exploration Geophysicists. All rights reserved.	en
heal.publisher	SOC EXPLORATION GEOPHYSICISTS	en
heal.journalName	Geophysics	en
dc.identifier.doi	10.1190/1.2950032	en
dc.identifier.isi	ISI:000259801000012	en
dc.identifier.volume	73	en
dc.identifier.issue	5	en
dc.identifier.spage	F189	en
dc.identifier.epage	F195	en