Freshwater Update 59, November 2013
Freshwater Update 59 brings you the latest information from our Freshwater and Estuaries centre, as well as Water Quality maps and information, and River flows.
The latest news from the centre includes:
The September map shows the effects of rain events nearly everywhere, with the exception of Bay of Plenty and Rangitikei in the North island, and northern Marlborough, South Canterbury, Central Otago and eastern Southland.
The July - September map (on the right) shows that the longer term drought effects persist in the western, north and central North Island and to a lesser extent in Nelson-Marlborough. The North Island east coast and Southern Alps are above normal to far above normal for the time of year.
Expansion of the NZ economy is based on increased agricultural productivity. This is limited by the availability of water for irrigation. In many regions of New Zealand, water from baseflows and groundwater is already fully allocated, so water harvesting from freshes and floods into storage reservoirs is the only option to meet increased water demand.
Landuse intensification and changes are taking a toll on our freshwater and estuarine ecosystems. NIWA research is developing knowledge and science-based tools for better management of these contaminants.