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5002 RM 18-18 SedNetNZ modelling to evaluate and quantify sediment sources from the Tukituki Catchment, Hawke’s Bay
Author(s): David Palmer, John Dymond, Les Basher, Anne-Gaelle Ausseil, Alexander Herzig, Harley Betts, Raphael Spiekermann
Publication Date: 1 March 2017
Publication Number: 5002
NIWA was contracted by the Hawke’s Bay Regional Council to assess the condition of eight lakes within the Hawke’s Bay Region in the 2016/17 summer using LakeSPI (Submerged Plant Indicators).
This report presents LakeSPI results for eleven lakes in the Hawke’s Bay region that have been surveyed using LakeSPI to date. This includes the eight lakes surveyed for this contract: Hatuma (WhatumÄ), Oingo, Poukawa, Rotongaio, Rotoroa, Rotonuiaha, Runanga and Whakaki; and three additional lakes: Kaweka West, Waikaremoana and Waikareiti, where LakeSPI results were already available.
Author(s): NIWA
Publication Date: 1 March 2017
Publication Number: 4971
This report is a synthesis of information from a scientific workshop held in Hawkes Bay on
“Ecosystem health in highly modified lowland catchmentsâ€. The workshop was hosted by the Hawkes
Bay Regional Council (HBRC) and Karamū catchment was used as a focus catchment to frame the
discussion. This catchment is one of four catchments subject to a proposed plan change. The primary
objective of the workshop was to identify which management actions would be most likely to
improve stream ecosystem health in lowland catchments such as the Karamū, while also protecting
other catchment and downstream values. Riparian management and nutrient reduction were
options of particular interest. Information gathered at the workshop was intended to inform the
TANK stakeholder group.
Author(s): Matheson
Publication Date: 1 March 2017
Publication Number: 4965
The Hawke’s Bay Riverbed Gravel Management Plan has been prepared under the Local Government Act (2002) following public submissions and public hearings. The Plan documents Hawke’s Bay Regional Council’s approach to managing the regions riverbed gravel resource, a responsibility that stems from a number of government statutes.
Gravel from Hawke’s Bay rivers is some of the best quality aggregate in New Zealand and essential for the economic development of the Region’s construction industry, whether it is used for our roads, cement production or even decorative stones used for landscaping around our gardens.
Flood hazard management is the primary reason for Hawke’s Bay Regional Council’s legal responsibilities for actively managing our riverbed gravel resource, and the key driver of this Plan. Like all our other natural resources we manage, (water, coast, air and land), our gravel resources require careful management. Extraction of gravel from riverbeds is essential for our Hawke’s Bay community’s safety, as it increases channel capacities and avoids flooding. Conversely, too much extraction can lead to degrading rivers that would undermine bridges and banks and lead to erosion of land.
Author(s): Daryl Lew
Publication Date: 1 March 2017
Publication Number: 4923
4928 RM 17-06 SOE wetland monitoring Tukituki catchment
Author(s): Beverley Clarkson, Scott Bartlam
Publication Date: 1 January 2017
Publication Number: 4928
In this report we map active faults in the Wairoa District for the purposes of producing Fault
Avoidance Zones suitable for land-use planning. The faults with the highest rates of activity
in this district are in the west: the Waiohau, Whakatane, Waimana and Waiotahi faults
(Figure 1.1 and Figure 2.1). There are also several short traces of possible active faults in
the low hill country to the northeast of Wairoa township. Active faults in some parts of the
Wairoa District were previously mapped by Langridge et al. (2011) but in the five years since
that report, methodology for active fault attributing has slightly changed and new fault
mapping and interpretation for the western part of the Wairoa District (not covered by
Langridge et al., 2011) is available in the GNS Science 1:250 000 geological maps of
Hawke’s Bay (Lee et al., 2011) and Rotorua (Leonard et al., 2010). This report updates the
active fault mapping the whole of the Wairoa District, including an update of the areas
covered by Langridge et al. (2011); it provides GIS data for active fault linework and Fault
Avoidance Zones in a manner consistent with recent work in Hastings District and Central
Hawkes Bay District (Langridge and Ries, 2014; 2015).
Author(s): KJ Clark, WF Reis, GNS Science
Publication Date: 1 January 2017
Publication Number: 4934
The Hawke’s Bay Regional Council (HBRC) is responsible for maintaining flood protection infrastructure throughout the major braided river systems in the Heretaunga Plains. These include the Tukituki, Waipawa, Ngaruroro, Esk and Tutaekuri. Gravel extraction and beach raking from dry river bars are tools HBRC uses to maintain flood-flow capacity and reduce erosion of flood control infrastructure.
Author(s): Robin Holmes
Publication Date: 1 January 2017
Publication Number: 4915
5358 RM 19-215 Land Cover, Crop Type and Land Use Mapping in Hawke's Bay 2013-2015
Author(s): David Pairman, Stella E Belliss, Stephen McNeill
Publication Date: 1 December 2016
Publication Number: 5358
This Riverbed Gravel Review Summary provides a more succinct overview of the findings of the 12 issues
plus a riverbed gravel management plan identified in the 2010 scoping study by Tonkin & Taylor to
review the way in which HBRC currently manages riverbed and coastal gravel resources within Hawke’s
Bay. The issues identified in the scoping study as requiring more research were examined over a 7-year
period with completion due at the end of the 2016/17 financial year. The work programme was
approved by Council in 2010 with funding provided by an increase in extraction management charges
(agreed by commercial extractors).
This summary also provides some updated material and comments since completion of the earlier
sections of work. This body of work contains the most up to date understanding of the issues around
riverbed gravel extraction, including sustainable supply, market demand, ecological effects of the
activity, flood management implications, legal, planning and financial implications.
It is this significant body of work and reports that provides the background for and informs the Riverbed
Gravel Management Strategy (RGMS). It is proposed that the recommendations of Sections 11 and 12
(EMS Report) be largely adopted and followed to complete the drafting of the RGMS.
Author(s): Gary Clode
Publication Date: 1 December 2016
Publication Number: 4911
Hawkes Bay Land and Water Strategy
Author(s): Gavin Ide
Publication Date: 29 November 2016
Publication Number: 4287
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