Complementary use of tracer and pumping tests to characterize a heterogeneous channelized aquifer system in New Zealand
Download (1.36 MB)
-
Altmetric Citations
Dann, Rodney; Close, M; Pang, L; Flintoft, M J; Hector, R P
Description
The combined use of pumping and tracer test data enabled the derivation of equivalent average hydraulic conductivities (K avg) for each test in a heterogeneous channelized alluvial aquifer, whereas K values of the preferential flow paths were two orders of magnitude higher. Greater and earlier drawdown was generally observed along preferential flow lines in a pumping test, within an array of 21 wells. The study aim was to characterize hydraulic properties of a channelized aquifer system in New...[Show more]
dc.contributor.author | Dann, Rodney | |
---|---|---|
dc.contributor.author | Close, M | |
dc.contributor.author | Pang, L | |
dc.contributor.author | Flintoft, M J | |
dc.contributor.author | Hector, R P | |
dc.date.accessioned | 2015-12-10T22:21:39Z | |
dc.identifier.issn | 1431-2174 | |
dc.identifier.uri | http://hdl.handle.net/1885/52306 | |
dc.description.abstract | The combined use of pumping and tracer test data enabled the derivation of equivalent average hydraulic conductivities (K avg) for each test in a heterogeneous channelized alluvial aquifer, whereas K values of the preferential flow paths were two orders of magnitude higher. Greater and earlier drawdown was generally observed along preferential flow lines in a pumping test, within an array of 21 wells. The study aim was to characterize hydraulic properties of a channelized aquifer system in New Zealand by combining tracer and pumping test data. Estimates were able to be made of the percentage of highly permeable channels within the profile (∼1.2%), effective porosity that reflected the maximum fraction of highly permeable channels within the aquifer (φeff-pc ∼0.0038), and flows through highly permeable channels (∼98%) and the sandy gravel matrix material (∼2%). Using φeff-pc, a tracer test Kavg value (∼93 m/day) was estimated that was equivalent to pumping test values (∼100 m/day), but two orders of magnitude smaller than K calculated solely from transport through permeable channels (Kpc ∼8,400 m/day). Derived K values of permeable and matrix material were similar to values derived from grain size distribution using the Kozeny-Carman equation. | |
dc.publisher | Verlag-Heinz Heise, GmbH & Co KG | |
dc.source | Hydrogeology Journal | |
dc.subject | Keywords: aquifer; channel flow; channelization; estimation method; hydraulic conductivity; porosity; pumping; testing method; tracer; Australasia; New Zealand Channelized aquifer; Heterogeneity; New Zealand; Pumping test; Tracertests | |
dc.title | Complementary use of tracer and pumping tests to characterize a heterogeneous channelized aquifer system in New Zealand | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 16 | |
dc.date.issued | 2008 | |
local.identifier.absfor | 020403 - Condensed Matter Modelling and Density Functional Theory | |
local.identifier.ariespublication | u9210271xPUB243 | |
local.type.status | Published Version | |
local.contributor.affiliation | Dann, Rodney, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Close, M, Institute for Environmental Science & Research | |
local.contributor.affiliation | Pang, L, Institute of Environmental Science and Research | |
local.contributor.affiliation | Flintoft, M J, Institute of Environmental Science and Research | |
local.contributor.affiliation | Hector, R P, Institute of Environmental Science and Research | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 6 | |
local.bibliographicCitation.startpage | 1177 | |
local.bibliographicCitation.lastpage | 1191 | |
local.identifier.doi | 10.1007/s10040-008-0291-4 | |
dc.date.updated | 2015-12-09T08:56:39Z | |
local.identifier.scopusID | 2-s2.0-51349120194 | |
Collections | ANU Research Publications |
Download
File | Description | Size | Format | Image |
---|---|---|---|---|
01_Dann_Complementary_use_of_tracer_2008.pdf | 1.36 MB | Adobe PDF |
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.
Updated: 17 November 2022/ Responsible Officer: University Librarian/ Page Contact: Library Systems & Web Coordinator