Characterization of basin-scale aquifer heterogeneity using transient hydraulic tomography with aquifer responses induced by groundwater exploitation reduction
Journal
Journal of Hydrology
Journal Volume
588
Date Issued
2020
Author(s)
DOI
JHYDA
Abstract
This study exploits aquifer responses to the reduction of pumping rates at different locations in a synthetic groundwater basin as basin-scale hydraulic tomography (HT) surveys to estimate transmissivity (T) and storage coefficient (S) fields. This experiment mimics the situation of groundwater exploitation reduction in a pilot area of groundwater-overexploitation control in the North China Plain. The results of the study show that taking advantage of the groundwater exploitation reduction as HT surveys is a viable approach for basin-scale parameter estimations. Results also suggest that HT analysis should use accurate mean values of T and S for geological zones as initial guesses for the inversion of parameters. Further, we show that the T and S fields estimated from HT yield accurate predictions of the groundwater flow velocities and breakthrough curves (BTCs). However, the BTCs based on kriged and zonal mean fields are inaccurate. The predicted BTCs using homogeneous fields fail to capture the true trend of solute concentration over time. We advocate that utilizing aquifer responses induced by groundwater exploitation reduction could be a new paradigm for basin-scale aquifer characterization. © 2020
Subjects
Aquifers; Groundwater flow; Surveys; Tomography; Aquifer characterization; Aquifer heterogeneity; Groundwater exploitation; Groundwater overexploitation; Hydraulic tomographies; Solute concentrations; Synthetic groundwater; Transient hydraulics; Groundwater resources; aquifer; basin analysis; experimental study; exploitation; groundwater; groundwater flow; heterogeneity; hydraulic property; hydrological response; pumping; tomography; transmissivity; China; North China Plain
Publisher
Elsevier B.V.
Type
journal article