Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water...
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Transcript of Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water...
![Page 1: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/1.jpg)
Te Waihora/Ellesmere Catchment Regional Water Plan
An Introduction for the Selwyn/Waihora Water Management Zone Committee
Lynda Weastell MurchisonPrincipal Planning & Consents Advisor06 April 2011
![Page 2: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/2.jpg)
CONTENTS
• Introduction to catchment & issues
• Why a regional water plan?
• What will be covered in the plan?
• How will the plan affect other activities?
• Role of Zone Committee
• Timeframe
![Page 3: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/3.jpg)
Te Waihora/Ellesmere Catchment
Big Ben Range
B. Peninsula
Waimakariri River
Rakaia River
ChCh/W Melton GW Zone
![Page 4: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/4.jpg)
Catchment Characteristics cont…
• Mix of ephemeral, braided and springfed waterways.
• Ground and surface water very strongly linked, hills & plains
• Influence of Rakaia and Waimakairi rivers.
• Localised rainfall recharge (except Rakaia/Waimakariri sub-areas)
• Variable mean annual rainfall: 560mm at coast to 1300-1600mm foothills.
• Estimated 346.3million m3/yr of groundwater - currently managed two allocation zones:
- Rakaia-Selwyn (215 million m3/yr) - Selwyn-Waimakariri (131.9 million m3/yr).
![Page 5: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/5.jpg)
Catchment Characteristics contcont…
• Land area 503 546ha (227 546ha plains & 276 000ha foothills)
• Foothills nw, impermeable rock strata – water resource is surface water.
• Plains 600m thick gravel aprons - water resource is ground water with surface gains & losses. Some surface run-off in high rainfall events.
• Banks Peninsula, impermeable rock – water resource is surface water.
• Land uses dominantly agricultural – water demand is irrigation & stock/domestic water
• Small settlements: community/town water supplies & some industrial supply
![Page 6: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/6.jpg)
Catchment Issues…
• Dry summer conditions and regular droughts limit potential agricultural productivity
• Demand for water for irrigation increased substantially in last 20 years (5-fold increase in resource consents issued since 1985)
• Demand for irrigation water continues, not all land areas have access to gw or reliable sw, and amount of gw allocated exceeds allocation limits.
• Both anecdotal and recorded evidence of changes in fw bodies, including:- Increased extent and frequency of drying reaches in ephemeral streams;- Increased low flow periods in springfed streams;- Reduced water quality in some water bodies; and- Loss of reliability in some shallow wells.
![Page 7: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/7.jpg)
Why do we need a Catchment Water Plan?
• NRRP- Provides for a catchment-specific approach (Var 10 for min flows for some
of the Te Waihora/Ellesmere catchment).- Has region-wide provisions apply in the absence of specific catchment
rules.- Region-wide provisions not suited to all catchments – eg, split
management of groundwater & surface water.- New challenges to water management in some areas, eg need to allocate
water to activities or areas.- Building a planning framework using region-wide provisions where a
consistent approach is appropriate and catchment-specific ones, where required.
- Fits CWMS model.
![Page 8: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/8.jpg)
Where the Plan Applies
![Page 9: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/9.jpg)
What the Plan Addresses
Stage 1•Immediate steps regulatory
•what need to do now to avoid increasing adverse effects.
Stage 2•Future management of the catchment
•Where want to get to & how going to do it:•- With more water;•- Without more water
Stage 3•Lake & catchment management
•- Combining it all
![Page 10: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/10.jpg)
What the Plan Addresses
Stage 1
•What we know & don’t know
•Issues & priority
•Manage additional allocation & use - now
Stage 2
•Where would we like to get to – goal scenarios?
•Costs & benefits – management scenarios
•What can we achieve – with & without additional water
Stage 3
•Combining the catchment
•Managing additional water in catchment & effects;
•Managing inputs into Te Waihora/Lake Ellesmere
![Page 11: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/11.jpg)
How the Plan Manages WaterKey Points
• Water is one resource:- Plains; all as groundwater - Hills; all as surface water
• Focus:- Catchment down to the lake - inputs into the lake- Quantity, quality & land uses
• Simplify & rationalise – use of key/indicator water bodies- Setting flows & quality stds- Monitoring sites- Manage relative to functions & values
![Page 12: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/12.jpg)
How the Plan Affects Other Activities
WCOPlan cannot be
inconsistent with WCO
New activitie
s
Must comply from time plan
is notified
Plan rules can include timing.
Existing activitie
s
Expiry.Consent
conditions - operative
Plan can indicate if
& when
![Page 13: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/13.jpg)
Role of the Zone Committee
Scoping plan
•Paper to May meeting
•Tech findings & topic recommendations
Developing Plan &
Consultation
•Committee may choose different level at different stages.
•Stage 1 options – May 2011.
Statutory Process
•No Zone Committee involvement.
•(Individual members submissions)
![Page 14: Te Waihora/Ellesmere Catchment Regional Water Plan An Introduction for the Selwyn/Waihora Water Management Zone Committee Lynda Weastell Murchison Principal.](https://reader036.fdocuments.us/reader036/viewer/2022062409/5697bfa41a28abf838c975cd/html5/thumbnails/14.jpg)
Timeframe
• Annual Plan Measures- Stage 1 – approved for notification July 2011- Stage 2 – approved for notification July 2012
Stage 1 – Timeframe pre 22/02/11 (to be revised)- Preliminary technical investigations - January 2011 - Peer review & follow up - Feb 2011- Report to Zone Committee - March 2011- Community consultation April-May 2011- Draft plan presented to ZC – June 2011- Draft plan approved for notification by Regional Council July 2011