Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 

Canterbury groundwater on healthy levels

December 20, 2006

Canterbury groundwater on healthy levels

Shallow and intermediate aquifers throughout the Canterbury region continue to display average to above average levels. However Environment Canterbury groundwater scientists say there is a slight seasonal declining trend visible in most records. This decline is the expected seasonal pattern associated with increased irrigation demand and a corresponding decrease in effective rainfall.

"Deeper aquifers are showing a significant increase to average levels and groundwater levels in the very deep aquifers have also started to rise. Some of these very deep wells in the Central and Ashburton plains have achieved average to slightly below average levels, though the response is still patchy", says ECan Hydrogeologist, Dr Howard Williams.

He says the slow increase in groundwater levels in the deeper aquifers is due to the slow rate at which infiltrating rainfall recharge travels down to the aquifers. In the shallower aquifers, rainfall and associated snowfall combined to create a rapid increase in groundwater level in June and July. In some of these wells, groundwater levels reached new highs. "The equivalent recharge effect in the very deep aquifers is only just now beginning to be observable; let's hope it continues through the summer," says Dr Williams.

In the Central Plains between the Rakaia and Waimakariri rivers, almost all monitoring wells indicate groundwater is at average to above average levels. Similarly, in the Ashburton Plains, all but very deep wells north of State Highway 1, show average levels.

In South Canterbury, in the Levels Plains area and around Temuka, groundwater in most shallow and moderate depth wells has recovered to average levels and these are now exhibiting a slow seasonal decline.

In North Canterbury, wells in the Rangiora, Kaiapoi and Oxford areas are indicating that groundwater levels are higher than this time last year.

Groundwater in aquifers serving the Christchurch water supply and industry indicate average to above average levels.

"Apart from the dry month of September, rainfall has continued during the spring period, with the result that irrigation demand is probably less than anticipated", says Dr Williams. ”Lower irrigation demand would be expected to result in a smaller decline in groundwater levels in comparison to previous years.” He says soil moisture results from Lincoln and Winchmore indicate that moisture levels are slightly higher than average for this time of year and significantly greater than this time last year. At Hororata, the moisture levels are recovering from the dry spring, with soil moisture levels just below average for the time of year.

“All in all it’s good news when compared to last year’s levels that set new record lows throughout the Canterbury plains.

ENDS

© Scoop Media

 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Gordon Campbell: On What We Could Do For Hong Kong, If Only We Dared

There has been something repulsive about PM Jacinda Ardern’s assurances that our joint 5 Eyes criticism of China’s actions over Hong Kong – and China’s harsh reaction – are all well understood on both sides. According to Ardern, it has been a case of us saying the sort of things we’ve said before, them acknowledging our need to do so, and then them responding much as we would expect them to do. All neat and tidy. Frankly, if all of this is merely virtue signalling on our part, and huffy declarations of independence on their part, then what’s the point of this diplomatic dance..? More>>

 

Grant Robertson: Government To Review Housing Settings

New Zealand’s stronger-than-expected economic performance has flowed through to housing demand, so the Government will review housing settings to improve access to the market, the Finance Minister Grant Robertson announced today. “Our focus More>>

ALSO:

Law Commission: Recommends New DNA Laws For Criminal Investigations

Te Aka Matua o te Ture | Law Commission today released a report that recommends a new, comprehensive regime to control how DNA is obtained, used and retained for criminal investigations. The report has revealed significant gaps in the operation ... More>>

ALSO:

National: Leader’s Speech At Annual General Meeting

Good morning delegates. It’s an absolute privilege to be speaking as your leader. I’d like to acknowledge the party president, regional chairs, board members, National Party staff, our MPs, our candidates, and most importantly, you – the delegates, ... More>>

ALSO:


Economy: Crown Accounts Reflect Govt’s Careful Economic Management

The better-than-expected Crown accounts released today show the Government’s careful management of the COVID-19 health crisis was the right approach to support the economy. As expected, the Crown accounts for the year to June 2020 show the operating balance ... More>>

ALSO:

Green Party: Announce Portfolio Reshuffle With Talented And Energised Caucus Team

“The Green Party caucus offers a breadth of talent and energy to the Parliament this term. In ten MPs you have a small business owner, a human rights lawyer, an academic, a climate negotiator, a transport planner, and so much more”, Green Party ... More>>

ALSO:

APEC: New Zealand Ready To Host Virtually

Prime Minister Jacinda Ardern took over the leadership of APEC earlier today, when she joined leaders from the 21 APEC economies virtually for the forum’s final 2020 meeting. “We look forward to hosting a fully virtual APEC 2021 next year. While ... More>>

ALSO:

 
 
 
 
 
 

LATEST HEADLINES

  • PARLIAMENT
  • POLITICS
  • REGIONAL
 
 

InfoPages News Channels