Zone Name:	Culverden Basin	Status:	(White)
Allocation Limit:	109.2 million m3/yr	Valid date:	23rd January 2004
Order of Approach:	First (15% of average annual rainfall)

Recharge component

Method of estimation

Background notes

Groundwater is recharged from losses from the streams/rivers that cross the Culverden Basin, direct land-surface rainfall infiltration and since 1980, groundwater has received a significant component of recharge from the Waiau irrigation scheme. The general pre-irrigation pattern of declining groundwater levels during the summer followed by increasing levels during the winter was reversed due to this additional source of recharge. Most wells are shallow (<30m) and no widespread high yielding aquifers have been located within explored depths of 120m. A stream depletion assessment for the Hurunui River Catchment (Report U02/70) indicates that Waitohi and Pahau Rivers are the most effected by groundwater abstraction

Other available information sources

These reports may be used to provide a full description of groundwater resources in this area. They may include information that will be of use in a consent application, but are not necessarily a comprehensive list.

• Brown, L. J. 2001: Groundwaters of the Canterbury Region. Environment Canterbury Technical Report R00/10.
• Weeber, J.H. and Talbot, J.D., 1984. 'Preliminary report on the groundwater resource of the Culverden Plain', North Canterbury Catchment Board and Regional Water Board, Unpublished report.
• Weeber, J. H, 2002, 'A desktop assessment of the effects of groundwater abstraction on surface water flow in the Hurunui River catchment' Environment Canterbury Unpublished Technical Report U02/70

Allocation history

Effective allocation

 30 August 2010

Effective Allocation (million m³): 31.37
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29%

 11 January 2010

Effective Allocation (million m³): 31.51
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29%

 7 December 2009

Effective Allocation (million m³): 31.81
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29%

3 November 2009

Effective Allocation (million m³): 31.93
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29%

3 August 2009

Effective Allocation (million m³): 32.26
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 30%

6 July 2009

Effective Allocation (million m³): 32.25
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 30%

2 June 2009

Effective Allocation (million m³): 32.37
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 30%

9 February 2009

Effective Allocation (million m³): 31.80
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

3 November 2008

Effective Allocation (million m³): 31.67
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

13 October 2008

Effective Allocation (million m³): 31.53
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

8 September 2008

Effective Allocation (million m³): 31.59
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

11 August 2008

Effective Allocation (million m³): 31.44
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

7 July 2008

Effective Allocation (million m³): 31.28
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

12 May 2008

Effective Allocation (million m³): 34.02
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 31.00%

3 December 2007

Effective Allocation (million m³): 32.04
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

1 October 2007

Effective Allocation (million m³): 31.41
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

3 September 2007

Effective Allocation (million m³): 31.23
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

23 July 2007

Effective Allocation (million m³): 31.18
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 29.00%

7 May 2007

Effective Allocation (million m³): 29.18
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 27.00%

19 February 2007

Effective Allocation (million m³): 28.97
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 25.60%

9 October 2006

Effective Allocation (million m³): 27.95
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 25.60%

18 September 2006

Effective Allocation (million m³): 27.01
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 25%

23 January 2004

Effective Allocation (million m³): 24.4
Reason for Change: This is the first estimate made
Source: Report U04/02 (Table 6.2)
Proportion Allocated: 22.34%
Allocation Limit

23 January 2004

Allocation Limit (million m³): 109.2
Reason for Change: This is the first estimate made using the 1st Order Approach
Source: Report U04/02 (Table 6.2)