Report: TR 2012/16
Author: MA Gusyev, U Morgenstern, G Zemansky, S Cameron, MW Toews, C Tschritter (GNS Science)
The Putaruru well field and the Blue Spring serve as a main source of drinking water for the town of Putaruru.
The South Waikato District Council would like to increase its consent to abstract a maximum of 3,800 m3/day from the Putaruru well field. The Blue Spring is also used by Coca-Cola Amatil for a bottled water source due its pristine water quality.
GNS Science was commissioned by Waikato Regional Council to delineate protection zones (PZ) and capture zones (CZ) for the Putaruru well field and the Blue Spring in order to facilitate the protection of groundwater quality at these drinking water supply sources.
|2||Site-specific and regional setting||2|
|2.1||Putaruru well field||2|
|2.7||Existing models in the Putaruru well field and Blue Spring area||6|
|2.8.3||Mean residence time (MRT)||7|
|3||Age tracer results and interpretation||8|
|4||Protection and capture zones||9|
|4.1||Criteria and method||9|
|4.2||Capture zone mapping||10|
|4.2.2||Calibration of groundwater flow model||10|
|4.2.3||Sensitivity and uncertainty of mapped capture zones||11|
|4.3||Comparison between mapped capture zones||11|
|5||Summary and recommendations||12|
|Appendix 1 - Methodology of groundwater age dating||27|