Waimea Aquifer at Chipmill

Groundwater Level for last 7 days at Waimea Lower Confined Aquifer at Chipmill

Groundwater Level for last 7 days at Waimea Lower Confined Aquifer at Chipmill
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Groundwater Level for last 30 days at Waimea Lower Confined Aquifer at Chipmill

Groundwater Level for last 30 days at Waimea Lower Confined Aquifer at Chipmill
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Groundwater History

Aquifer: Lower Confined Aquifer (LCA)

Catchment: Waimea

Zone: Lower Confined aquifer

Period of analysis: 27 December 1976 to 31 December 2016

Comment: This site is by the coast and acts as a sentinel well to monitor levels/salinity in this aquifer that stretches out to the sea below the Waimea estuary. The water levels in this well get affected by pumpage from other large wells due to the lower permeability of the LCA.  When water levels are constantly below 0m the risk of seawater intrusion into the aquifer increases. Water restrictions are brought in when levels constantly get below 0m.

  Month
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min level (m) -4.62 -4.95 -4.94 -2.47 -1.54 0.0 0.68 0.15 -0.68 -2.37 -3.82 -3.2
Year it occurred 1998 1990 1990 1978 2001 2001 1992 2007 2005 1997 1997 1990
Max level (m) 4.60 4.56 4.67 4.51 4.70 4.78 5.02 4.94 4.97 5.02 4.95 5.21
Year it occurred 2002 1986 1988 1995 2016 2016 1978 1984 1983 1983 1981 1981
Average 0.30 0.93 0.97 1.76 2.4 2.68 2.93 2.93 2.93 2.55 1.57 1.01

This table shows the minimum and maximum water levels recorded each month and the year the extreme value was reached during the stated analysis period.

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Map of Site Location


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Disclaimer

Tasman District Council has exercised all reasonable skill and care in collecting and displaying this information. However, the data is provisional, and may be incorrect until checked by staff. Data should be used with caution where there are safety, monetary, or operational consequences if the data is incorrect. Note also, the data may be changed at a later time.