scholarly journals Earthquake Swarm Activity Beneath the Tokaanu-Waihi Geothermal System, Lake Taupo, New Zealand

1995 ◽  
Author(s):  
M.P. Hochstein ◽  
S. Sherburn ◽  
J. Tikku
Keyword(s):  
New Zealand ◽  
Earthquake Swarm ◽  
Geothermal System ◽  
Swarm Activity

scholarly journals Wastewater disposal and earthquake swarm activity at the southern end of the Central Valley, California

2016 ◽  
Vol 43 (3) ◽  
pp. 1092-1099 ◽  
Author(s):  
T. H. W. Goebel ◽  
S. M. Hosseini ◽  
F. Cappa ◽  
E. Hauksson ◽  
J. P. Ampuero ◽  
...  
Keyword(s):  
Earthquake Swarm ◽  
Central Valley ◽  
Wastewater Disposal ◽  
Swarm Activity

Revised hydrogeological model of the hydrothermal system Waiwera (New Zealand)

2021 ◽  
Author(s):  
Andreas Grafe ◽  
Thomas Kempka ◽  
Michael Schneider ◽  
Michael Kühn
Keyword(s):  
Water Management ◽  
New Zealand ◽  
Water Level ◽  
Hot Water ◽  
Hydrogeology Journal ◽  
Natural State ◽  
Geothermal System ◽  
Geological Model ◽  
Species Transport ◽  
Study Region

<p>The geothermal hot water reservoir underlying the coastal township of Waiwera, northern Auckland Region, New Zealand, has been commercially utilized since 1863. The reservoir is complex in nature, as it is controlled by several coupled processes, namely flow, heat transfer and species transport. At the base of the aquifer, geothermal water of around 50°C enters. Meanwhile, freshwater percolates from the west and saltwater penetrates from the sea in the east. Understanding of the system’s dynamics is vital, as decades of unregulated, excessive abstraction resulted in the loss of previously artesian conditions. To protect the reservoir and secure the livelihoods of businesses, a Water Management Plan by The Auckland Regional Council was declared in the 1980s [1]. In attempts to describe the complex dynamics of the reservoir system with the goal of supplementing sustainable decision-making, studies in the past decades have brought forth several predictive models [2]. These models ranged from being purely data driven statistical [3] to fully coupled process simulations [1].<br><br>Our objective was to improve upon previous numerical models by introducing an updated geological model, in which the findings of a recently undertaken field campaign were integrated [4]. A static 2D Model was firstly reconstructed and verified to earlier multivariate regression model results. Furthermore, the model was expanded spatially into the third dimension. In difference to previous models, the influence of basic geologic structures and the sea water level onto the geothermal system are accounted for. Notably, the orientation of dipped horizontal layers as well as major regional faults are implemented from updated field data [4]. Additionally, the model now includes the regional topography extracted from a digital elevation model and further combined with the coastal bathymetry. Parameters relating to the hydrogeological properties of the strata along with the thermophysical properties of water with respect to depth were applied. Lastly, the catchment area and water balance of the study region are considered.<br><br>The simulation results provide new insights on the geothermal reservoir’s natural state. Numerical simulations considering coupled fluid flow as well as heat and species transport have been carried out using the in-house TRANSport Simulation Environment [5], which has been previously verified against different density-driven flow benchmarks [1]. The revised geological model improves the agreement between observations and simulations in view of the timely and spatial development of water level, temperature and species concentrations, and thus enables more reliable predictions required for water management planning.<br><br>[1] Kühn M., Stöfen H. (2005):<br>      Hydrogeology Journal, 13, 606–626,<br>      https://doi.org/10.1007/s10040-004-0377-6<br><br>[2] Kühn M., Altmannsberger C. (2016):<br>      Energy Procedia, 97, 403-410,<br>      https://doi.org/10.1016/j.egypro.2016.10.034<br><br>[3] Kühn M., Schöne T. (2017):<br>      Energy Procedia, 125, 571-579,<br>      https://doi.org/10.1016/j.egypro.2017.08.196<br><br>[4] Präg M., Becker I., Hilgers C., Walter T.R., Kühn M. (2020):<br>      Advances in Geosciences, 54, 165-171,<br>      https://doi.org/10.5194/adgeo-54-165-2020<br><br>[5] Kempka T. (2020):<br>      Adv. Geosci., 54, 67–77,<br>      https://doi.org/10.5194/adgeo-54-67-2020</p>

scholarly journals Modelling of Completion Tests in Two Wells of the Wairakei – Tauhara Geothermal System, New Zealand

2019 ◽  
Vol 254 ◽  
pp. 012025
Author(s):  
Marchellina S. Sylvania ◽  
Mike O’Sullivan ◽  
John O’Sullivan ◽  
Kerin Brockbank
Keyword(s):  
New Zealand ◽  
Geothermal System

Numerical modelling of production from the Poihipi dry steam zone: Wairakei geothermal system, New Zealand

Geothermics ◽  
2007 ◽  
Vol 36 (4) ◽  
pp. 289-303 ◽  
Author(s):  
Sadiq Zarrouk ◽  
Michael O'Sullivan ◽  
Adrian Croucher ◽  
Warren Mannington
Keyword(s):  
New Zealand ◽  
Numerical Modelling ◽  
Geothermal System

The Broadlands–Ohaaki geothermal system, New Zealand Part 1. Strontium isotope distribution in well BrO-29

2000 ◽  
Vol 163 (1-4) ◽  
pp. 247-265 ◽  
Author(s):  
Stephen Grimes ◽  
David Rickard ◽  
Chris Hawkesworth ◽  
Peter van Calsteren ◽  
Patrick Browne
Keyword(s):  
New Zealand ◽  
Strontium Isotope ◽  
Geothermal System ◽  
Isotope Distribution

The geological framework of the Wairakei–Tauhara Geothermal System, New Zealand

Geothermics ◽  
2009 ◽  
Vol 38 (1) ◽  
pp. 72-84 ◽  
Author(s):  
Michael D. Rosenberg ◽  
Greg Bignall ◽  
Andrew J. Rae
Keyword(s):  
New Zealand ◽  
Geothermal System
Sign in / Sign up

Export Citation Format

Share Document