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Takiwā Lakes

Takiwā Lakes is a 'geospatial database' for storing lake data in a visual format based on its location, it integrates comprehensive national environmental databases, routine and high-frequency data, and 'big data' from other sensors, into a single platform.

Takiwā has been set up to provide a scalable and persistent visualization database to benefit a diverse range of stakeholders throughout New Zealand. One of the central tenets of Takiwā is to make data fully open and accessible through the remaining duration of the LERNZ programme. The ability to continue Takiwā beyond this time will depend on 'buy in' from stakeholders depending on their perceptions of the usefulness of the platform as a freshwater data repository and visualization tool. Takiwā Lakes is free to use following registration here.



Shorelines of all lakes in New Zealand >1 ha identified by their 'FENZ ID' number. Lake vital statistics including surface area, depth, volume and elevation.


Centrelines of every segment of New Zealand's network of rivers and stream, derived from the River Environment Classification (REC) database. Each reach is associated with a stream order value with can be individually selected.


Catchment boundaries of all lakes in New Zealand >1 ha identified by their 'FENZ ID' number. Catchment vital statistics including catchment area, percentage land-use, discharge to lake, sediment load and nutrient load to lake.


Land associated with specific reaches from the River Environment Classification (REC) database. Each subcatchment is associated with a stream order value with can be individually selected.


Long-term average values for key water quality attributes calculated from regional council monitoring data held by the Ministry for the Environment including Trophic Level Index, Secchi depth, total nitrogen, total phosphorus and chlorophyll a. National Objective Framework classifications relating to phosphorus, nitrogen and Chlorophyll a are also included.


Topographic contours at either 1:20,000, 1:50,000, 1:100,000 or 1:250,000 scale, colour coded by elevation.


The New Zealand Soil Classification, soil drainage, soil depth and soil texture layers.


New Zealand Land Cover Database (LCDB-4.1) containing 33 land cover classes, and the New Zealand Land Resource Inventory (NZLRI) which includes rock type, soil, slope, present type and severity of erosion, and vegetation at 1:50,000 scale.


A visual representation with access links to the LERNZdb records. LERNZdb is a data repository that supports the storage and retrieval of water quality and biological data measured in lakes and rivers by LERNZ researchers.


New Zealand Freshwater Fish Database observations for the occurrence of catfish, goldfish, koi carp, gambusia, perch, rudd and tench. Includes site location, species abundance, fishing method.


Lake water colour expressed as dominant wavelength (nm) determined from Landsat 8 OLI data from 2013 to 2017 and colour purity which is a measure of the magnitude of the contribution of the light at the dominant wavelength to the perceived colour.


Real-time data from lake monitoring buoys including temperature, dissolved oxygen, chlorophyll fluorescence and phycocyanin.

Lakes and lake catchment polygons, displayed with elevation.

River Environment Classification center lines.

Landcover (LCDB 4.1) and lake metadata.

Water quality indicators including chlorophyll a.