Welcome to ECan’s Freshwater Reports

This site contains seasonal reports and maps of Canterbury illustrating the relative wetness or dryness for precipitation, surface water, and groundwater. The intended audience for the maps and the associated reports are the Environment Canterbury scientists and councilors.

The Latest Monthly Maps section has maps that are automatically updated once a month (at least). The last update was on: 2021-06-09

NIWA seasonal climate outlook

NIWA produces seasonal forecasts, which can be found on NIWA’s website.

Latest Monthly Maps

• Latest Groundwater CWMS Zone Map
• Latest Precipitation and Surface Water Subregion Map
• Latest Surface Water Catchment Map

Summer-Autumn 2018

• Precipitation and Surface Water
  • Surface take restrictions for irrigation
  • Selwyn River/Waikirikiri flows
  • Waimakariri high country lakes fish rash
  • Lindavia in Canterbury lakes
• Groundwater
  • Groundwater levels and forecast

Spring-Summer 2017-18

• Precipitation and Surface Water
  • High water demand as dry conditions take hold
  • Surface take restrictions for irrigation
  • Key messages for the farming and urban community
• Groundwater
  • Groundwater levels and forecast

Methodology

• Methodology for the monthly precipitation, surface water, and groundwater maps
  • Introduction
  • Surface water and precipitation
  • Groundwater