Please use this identifier to cite or link to this item:
Title: Implementation of groundwater numerical models in geological contexts of urban areas
Authors: Di Salvo, Cristina
metadata.dc.contributor.advisor: Capelli, Giuseppe
Issue Date: 12-Apr-2011
Publisher: Università degli studi Roma Tre
Abstract: The work presented in this thesis is a combined process of conceptual and numerical modeling of Rome’s aquifer system; it is carried out by a phase of data collecting and archiving ,and a phase of study in depth of the conceptual geological setting (both phases realized in collaboration with Igag-CNR); then, the geological setting has been translated into a hydrogeological framework, starting from hydrologic and hydrogeologic data and previous regional studies; this phase included extraction of information from the database and the data elaboration into cross sections and modeled surfaces. Finally, the conceptual hydrogeological model has been used to build a numerical model by using the finite-difference code MODFLOW2000® and the graphical interface GroundwaterVistas® 5.41(ESI). Modeled area extends on a basin-scale in an area of 237402 m2 including high urbanization zones, as the hystorical center of the City; the complexity of the geological setting of the roman sector, the complications in groundwater and surface water flux due to the modification of the natural hydrologic setting and the lack of valid series of head data, river flux and k measurements, strongly increase the uncertainty on model results.The work has been developed by those steps - Creation of database capable to collect hydrogeological data as: well logs, head measurements, spring discharge, pumping tests; - Collecting 2950 well data ; 326 have been used to construct cross sections and top surfaces; - building top surfaces of: Plio-pleistocene complexes (including Monte Vaticano and Monte Mario Formation), Ponte Galeria Formation, alluvial basal gravel; moreover, the maximum erosional surface of Tiber alluvial valley has been built - implementation of a quasi-3D steady state numerical model set up with 8 layers, a horizontal cell discretization of 50 x 50 meters, for a total area of 237402 m2 - model calibration, carried out on following parameters: recharge in urban and non urban areas, complexes hydraulic conductivities, General Head boundaries hydraulic conductivity, drain and river bed hydraulic conductivity; calibration was performed by a trial-and-error method based on head target residuals statistics and by 5 autosensitivity analysis; - Computation of inflows and outflows both for the whole model and for each hydrostratigraphic unit. - Comparison between the 10-years averaged aquifer system’s water balance (Capelli et alii, 2005) and the model’s water budget.
Access Rights: info:eu-repo/semantics/openAccess
Appears in Collections:X_Dipartimento di Scienze geologiche
T - Tesi di dottorato

Files in This Item:
File Description SizeFormat
Implementation of groundwater numerical models in geological.pdf21.23 MBAdobe PDFView/Open
SFX Query Show full item record Recommend this item

Page view(s)

Last Week
Last month
checked on Oct 24, 2020


checked on Oct 24, 2020

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.