Lake Ecosystem Research New Zealand
Takiwā Lakes is a web-based geospatial database storing lake data in visual format. It has been developed as part of a collaboration between LERNZ and Waiora Pacific Ltd. The data consist of layers containing:
» Lake bathymetry (shape and depth) and catchment boundaries.
» Land topographic information (Land Information New Zealand).» Land use and capability (Land Cover Data Base 4).
» River and stream networks and order (River Environment Classification).
» Soil properties and types (S-map).
» Freshwater fish database (NIWA).
» Raw data files on physical, chemical and biological variables (LERNZdB).
» Satellite remote sensing images.» High-frequency data from lake buoys.
» Lake nutrient and chlorophyll concentrations, Trophic Level Index and comparisons against the National Objectives Framework.
» Modelled predictions of lake trophic state based on catchment nutrient loads.
» Catchment nutrient and sediment loads (CLUES).
» ‘Vital statistics’ on lakes including depth, area, trophic state, etc.
» Predictions of coarse fish invasion and establishment potential.
» Over 600 publications specific to a lake or area (georeferenced).
LERNZ has developed B3, an open-source suite of software designed for the QA/QC of high-frequency monitoring data. It is a more efficient alternative to environmental data processing in Microsoft ExcelTM, with an intuitive interface and lower 'barrier-to-entry' than more technical software packages such as MATLABTM.
LERNZ has also developed Data Standardizer, an application which takes raw field data from high frequency buoys and standardizes in a common matrix format. Data Standardizer then cleans the data by removing any empty or waste lines and by bringing the header into a standard format.
The LERNZ Fact Sheets series provides a two-page summaries of research topics conducted by LERNZ researchers. Topics include lake modelling, remote sensing, invasive fish management, zooplankton colonisation, lake restoration and lake data tools.
LERNZdb is a repository supporting the storage and retrieval of water quality and biological data measured in lakes, rivers and wetlands in New Zealand. It is part of the Lake Ecosystem Research New Zealand (LERNZ).