Zone Name:	Rangitata - Orton	Status:	(Red)
Allocation Limit:	42.5 million m3/yr	Valid date:	24th November2004
Order of Approach:	Second (50% of land-based recharge)

Recharge Component

Method of Estimation

Background Notes

There are no foothill streams in this zone to provide additional river recharge, or irrigation schemes to provide increased leakage. The only recharge sources considered are therefore rainfall, and groundwater sourced irrigation return water.
Deeper aquifers are extensively utilised, especially coastwards of State Highway One. Water level monitoring has shown increasing summer drawdowns due to abstraction, which do appear to recover each winter.

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.

• Aitchison-Earl, P., Davey, G., Ettema, M., McKerchar, A., Scott, D., Smith, E., and Weeber, J. 'State of the Canterbury Region Water Resource October 2004' (pdf 3.83 MB), U04/101.
• Aitchison-Earl, 2001 'Rangitata-Orari Deep Groundwater Review' Environment Canterbury Unpublished Technical Report U02/71.
• Brown, L. J, 2000, 'Groundwaters of the Canterbury Region' Environment Canterbury Report R00/10.
• U97/34 Rangitata-Temuka Groundwater Review, Issues and Recommended Future Investigations. Environmental Consultancy Services Ltd. August 1997
• Aitchison-Earl, P., 2001, Effects of Groundwater Abstraction on Surface Water Flows in the Rangitata River and Tributaries U01/7

Allocation History

Effective Allocation

9 February 2009

Effective Allocation (million m³): 43.99
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 104%

1 December 2008

Effective Allocation (million m³): 43.94
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 103%

3 November 2008

Effective Allocation (million m³): 43.95
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 103%

11 August 2008

Effective Allocation (million m³): 43.85
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 103%

7 July 2008

Effective Allocation (million m³): 43.56
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 102%

Effective Allocation (million m³): 43.54
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 102%

5 November 2007

Effective Allocation (million m³): 43.45
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 102%

3 September 2007

Effective Allocation (million m³): 43.49
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 102%

23 July 2007

Effective Allocation (million m³): 42.91
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 101%

19 February 2007

Effective Allocation (million m³): 44.27
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 104.16%

5 December 2006

Effective Allocation (million m³): 43.72
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 102.3%

25 September 2006

Effective Allocation (million m³): 42.545
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 100.11%

17 January 2006

Effective Allocation (million m³): 42.62
Reason for Change: Consents update
Source: Consents database live-read
Proportion Allocated: 100%

29 June 2005

Effective Allocation (million m³): 40.88
Reason for Change: Effective allocation recalculated using a revised table of irrigation standards to address concerns with Schedule WQN9 of Chapter 5 NRRP, as approved by the Water Allocation Panel
Source: Consents database live-read on 29 June 2005
Proportion Allocated: 96.00%

24 January 2005

Effective Allocation (million m³): 36
Reason for Change: Effective allocation recalculated using the 150 day method as Schedule WQN9 estimate may be flawed, as approved by the Water Allocation Panel on 24-01-05
Source: Consents database live-read 4-02-05
Proportion Allocated: 84.71%

20 December 2004

Effective Allocation (million m³): 24.41
Reason for Change: Consents update (includes QA of the whole zone)
Source: Consents database
Proportion Allocated: 57.44%

24 November 2004

Effective Allocation (million m³): 27.1
Reason for Change: No change
Source:
Proportion Allocated: 63.76%
Proportion Allocated changed due to Allocation Limit change

20 September 2004

Effective Allocation (million m³): 27.1
Reason for Change: Effective allocation estimate updated based on Schedule WQN9, Chapter 5, NRRP. Water considered to be coming from the Rangitata River excluded from the groundwater allocation based on stream depletion assessments
Source: Memo to Groundwater Water Implementation Group (now Water Allocation Group) 13-09-04
Proportion Allocated: 82.37%

31 March 2004

Effective Allocation (million m³): 50.03
Reason for Change: Consents update
Source: Consents database
Proportion Allocated: 152.07%

23 January 2004

Effective Allocation (million m³): 49.1
Reason for Change: This is the first estimate made
Source: Report U04/02 (Table 6.2)
Proportion Allocated: 149.24%

Allocation Limit

24 November 2004

Allocation Limit (million m³): 42.5
Reason for Change: Implementation of 2nd order approach as approved by Directorate
Source: Report U04/97

23 January 2004

Allocation Limit (million m³): 32.9
Reason for Change: This is the first estimate made
Source: Report U04/02 (Table 6.2)