Freshwater reports

These reports relate to river flows and levels in groundwater systems in the Gisborne district.  The information in the reports will assist the development of the Gisborne Freshwater Plan.

Implications of the national environmental standard (NES) ecological flows for GDC (847kb 36 pages)
Interim limits on the alteration of flows in rivers and levels in groundwater systems.

Annual low flows for Waipaoa and Te Arai rivers (644kb 27 pages)
Review of flow records for the Waipaoa and Te Arai rivers.

Uses of existing GDC groundwater information (196kb 11 pages)
Review of information regarding the Poverty Bay aquifers.

Proposed GDC water plan framework (846kb 35 pages)
Development of a regional water plan and other freshwater management tools.

Instream habitat values for Waipaoa and Te Arai Rviers (1.56MB 65 pages)
An assessment of river flow regime requirements for in-stream ecological values for the Waipaoa and Te Arai rivers.

Dairy impacts on the Motu River (1.88MB 49 pages)
This report provides advice regarding water quality issues associated with intensive dairying; monitoring approaches to document water quality changes; and best management practices to mitigate water quality impacts.

Method for identifying tangata whenua cultural flows for the Te Arai river catchment (403kb 29 pages)
The purpose of this report is to describe the methodology that we recommend to collect and analyse data directly related to Matauranga Maori as defined by tangata whenua.

Gisborne groundwater workshop notes - 7 May 2010 (232kb 8 pages)

Trends and observations in landuse on the Poverty Bay Flats (2MB 13 pages)
Trends in areas of crop types - 4 years surveys 2007-2011

Surface water allocation of the Waipaoa and Te Arai Rivers (1.03MB 16pages)
Provides analysis, background, limitations and interim minimum low flow requirements on the Waipaoa and Te Arai rivers.

Sedimentation history of Waipaoa catchment (3.67MB 58 pages)
Literature review of the pre and post human settlements erosion and sedimentation rates in Waipaoa catchment.

Water demand forecasting - Gisborne water supply (69kb 8 pages)
"Basic" demand forecast as part of the Ten Year Plan process for the Gisborne water supply.