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These polygons represent the groundwater allocation catchments in the Bay of Plenty. These polygons are mapped to typically follow surface water catchments. Primary surface water catchments have been divided into groundwater catchments for the region where groundwater systems occur. For each groundwater catchment it has been assumed that the groundwater systems are unconfined; that there is a hydraulic connection to surface waters. A mass water balance has been calculated for each groundwater catchment. A volume was set aside to maintain flows to springs and streams. The remaining groundwater volume was then allocated based on Proposed National Environmental Standard on Ecological Flows and Water Levels (2008); no more than 35% of average annual recharge to the aquifer be allocated.The mass water balance for each groundwater catchment has been calculated by GNS and reported on in various reports for each region held in BOPRC library. These report numbers are: GNS Science Consultancy Report: 2008/134; 2008/240; 2010/113; 2012/263; and 2014/283.Catchments have been extracted from the Bay of Plenty Surface Catchments and merged where appropriate. This layer provides information with regard to groundwater availability and allocation based on water balance work undertaken by Paul White from GNS Science, 35% of NES and groundwater allocated under water permit (RMA).PS. Please read the Fields descriptions for better understanding of how this layer was created. If you can not see the fields descriptions for this layer, you need to change the Metadata Options to FGDC CSDGM Metadata. Contact a GIS team memeber if you don't know how to do this.PPS. GIS team: You can use this FME script for any future updates: Q:\SharedTools\FME\Update Water Allocation - Unconfied Aquifer.fmw |