| File Identifier: |
C9EFC009-2984-4D90-96B0-E9727126BDA1 |
Parent Identifier: |
F625DDEB-845D-45D5-B261-A1DBA4DA5905 |
|---|
| Hierarchy Level: |
feature |
Hierarchy Level Name: | feature of Rivers and Streams of Significant Natural Area - GIS Layer |
|---|
| Abstract: |
River and stream condition and conservation value in the Waikato Region. |
|---|
| Statement: |
A range of data and analyses were compiled to describe river and stream condition and conservation value in the Waikato Region. Results are provided as spatial data for use by Waikato Regional Council staff to assist with the identification of Significant Natural Areas.
Zonation components include:
1. Data describing the distributions of Freshwater Environments of New Zealand (FENZ) classification groups were analysed using the site selection software, Zonation, to identify sets of sites that would provide maximum conservation outcomes at minimum cost. Rivers and streams were grouped into planning units, based around 2nd order catchments. Rankings for each planning unit were calculated using an approach that takes account of the need for representative protection of a full range of ecosystem types, while allowing for both human impacts and requirements for upstream-downstream connectivity between planning units in larger rivers and streams. Rankings were also calculated taking account of current protected areas to identify those planning units that would best complement areas that are already formally protected.
2. A parallel set of analyses using Zonation was performed on data describing the expected probability of capture of seventeen native fish species, as predicted from species distribution models.
3. Results from a separate analysis of national conservation rankings performed for the Department of Conservation at a national scale using FENZ data and Zonation were summarised for each planning unit occurring within the Waikato Region.
4. Information describing the distributions of selected rare or threatened freshwater species (longfin eel, giant kokopu, shortjaw kokopu, lamprey, koura, blue duck and Hochstetter’s frog) within the Waikato Region was assembled from a variety of sources and summarised. This information focussed on species for which predictions of distributions had been made or for which comprehensive databases were available, and was used to develop a ‘rare species score’ to identify those planning units likely to support these rare or threatened species.
Additional spatial layers were developed by Waikato Regional Council to capture the following:
5. Pressures not included in the Zonation analysis that are likely to have adverse biodiversity affects including number of water takes, discharges, mines and culverts within a planning unit.
6. ‘_Biodiversity booster_’ attributes that could enhance the biodiversity significance of particular sites identified as having known special features, such as providing a key role for a particular life-history stage, or maintaining healthy stream ecosystems within developed or managed environments. Four potential biodiversity boosters were identified: lowland fish spawning habitat, exotic forest reservoirs, significant riparian shade and special features identified by DoC staff or recognised as of international significance.
Data exists for each of the 7472 2nd order planning units (REC catchments) as identified by the Zonation analysis. These were initially ranked according to criteria selected by the project team (see technical report) then the top ranked 20% was subject to further analysis against the Waikato Regional Council booster layers. All 7472 planning units are included in the GIS layer, together with their Zonation attributes, but only the top 20% of records have the extended attributes (including additional pressures not considered in the Zonation analysis) determined during the final prioritisation.
Refer to Waikato Regional Council Technical Report 2010/19, doc#1480934 for further details.
For data aquistion methods contact NIWA for details. |
|---|
| Other Information: |
Attribute accuracy:
Data Quality:
For Zonation process and outputs refer NIWA client report HAM2009-027 “Identification of high value rivers and streams in the Waikato Region: Final report” (also filed as Waikato Regional Council document#1460478).
For final analyses and project outcomes and draft list of priority units refer Waikato Regional Council Technical Report 2010/19, document# 1480934. Additional information may be available from Waikato Regional Council regarding other data sets used and GIS analysis performed.
The variables in this dataset are non-spatial. They are fundamentally related to the REC spatial layers via common NZREACH value. For information on the positional accuracy of the REC dataset see EWDOCS# 935413.
Period and frequency of record:
Third-order Zonation data were compiled by NIWA and supplied to Waikato Regional Council in 2008, and were subsequently updated with second-order data in January 2010. Boosters and pressures data were compiled by Waikato Regional Council and used to produce findings in Waikato Regional Council Technical Report# 1480934 in June 2010
Data Quality:
For Zonation process and outputs refer NIWA client report HAM2009-027 “Identification of high value rivers and streams in the Waikato Region: Final report” (also filed as Waikato Regional Council document#1460478).
For final analyses and project outcomes and draft list of priority units refer Waikato Regional Council Technical Report 2010/19, document# 1480934. Additional information may be available from Waikato Regional Council regarding other data sets used and GIS analysis performed.
For logical consistency same information for Data Quality applies. The NZREACH attribute joins the various FWENZ variables (layers) to their corresponding river/stream in REC dataset (see EWDOCS# 935413).
The data form and digital format of this dataset is tables in Oracle, avaliable in Geomedia GIS_ALL Oracle connection. |
|---|
| Keywords: |
Biodiversity,River,SNA,Stream |
|---|
| Topic Category: |
inlandWaters:inland water features, drainage systems and their characteristics |
|---|
| Resource Reference Date: |
17/06/2011 |
|---|
| Name | Description | Notes | Restricted | Primary Key |
|---|
| ID |
Unique ID |
Primary key, software - assigned |
N |
Y |
| TA |
Territorial authority |
A planning unit may fall within one or more TA |
N |
N |
| ECOLDISTRICT |
Ecological district |
A planning unit may fall within one or more ecological district |
N |
N |
| ECOLREGION |
Ecological region |
A planning unit may fall within one or more ecological region |
N |
N |
| AREAHA |
Area (hectares) |
Area of planning unit geometry |
N |
N |
| SCORE |
Ranking score |
Sum of selected input variables weighted by different participants from DOC, Waikato Regional Council, NIWA (see Technical Report) |
N |
N |
| PCCLASS |
Percentage bin |
Percentage bins in 2% steps, used to aid in final priority rankings |
N |
N |
| PRIORITY |
Priority tag |
Priority tag of A – E (where A is high) assigned based on bin value and application of biodiversity boosters |
N |
N |
| LOWLANDSPAWNING |
Lowland fish spawning tag (1/0) |
Biodiversity booster: value of 1 if planning unit contains an area of potential lowland fish spawning habitat (see report) |
N |
N |
| EXOTICFOREST |
Exotic forest reservoir tag (1/0) |
Biodiversity booster: value of 1 if planning unit contains >50% area in forest vegetation classes |
N |
N |
| SEGSHADE |
Biodiversity booster: value of 1 if planning unit contains >50% area in forest vegetation classes |
Biodiversity booster: value of 1 if planning unit has >50% of stream segment length with >=80% riparian shade (FENZ segshade) |
N |
N |
| SPECIALSITES |
Special site tag (1/0) |
Biodiversity booster: value of 1 if planning unit contains a special site. Special sites include DOC-supplied sites of significant biodiversity value and those considered of international significance |
N |
N |
| TAKES |
Count of surface water takes |
Biodiversity pressure: Count of surface water take consents within the planning unit |
N |
N |
| DISCHARGES |
Count of discharges to water |
Biodiversity pressure: Count of discharge to water consents within the planning unit |
N |
N |
| MINES |
Count of mines |
Count of mines |
N |
N |
| CULVERTS |
Count of culverts |
Biodiversity pressure: Count of culverts within a planning unit rated as barriers to fish passage at most or low flows |
N |
N |
| RANK |
Zonation ranking |
Original ranking from 1 (highest) to 1494 (lowest) of the top 20% combined Zonation values. Ranking prior to application of Waikato Regional Council booster and pressure layers |
N |
N |
| PROT80 |
DOC protected area tag (1/0) |
Value of 1 if a planning unit has >=80% of its area in the protected area layer used as input to the Zonation analysis (mainly DOC estate) |
N |
N |
| OVERLAP_PROTECTED_EW |
Waikato Regional Council protected area tag (1/0) |
Value of 1 if a planning unit overlaps Waikato Regional Council protected area (which has greater extent than above protected area layer). |
N |
N |
| COAST_SLOPE |
Slope at coastal units |
Average slope within planning units that touch the coast |
N |
N |
| VEG1 |
Veg1 forest area |
Area (ha) within planning unit of vegetation type1: Broadleaved Indigenous Hardwoods |
N |
N |
| VEG1PC |
Veg1 forest % |
Percentage area of veg1 within planning unit |
N |
N |
| VEG2 |
Veg2 forest area |
Area (ha) within planning unit of vegetation type2: Deciduous Hardwoods |
N |
N |
| VEG2PC |
Veg2 forest % |
Percentage area of veg2 within planning unit |
N |
N |
| VEG3 |
Veg3 forest area |
Area (ha) within planning unit of vegetation type3: Fernland |
N |
N |
| VEG3PC |
Veg3 forest % |
Percentage area of veg3 within planning unit |
N |
N |
| VEG4 |
Veg4 forest area |
Area (ha) within planning unit of vegetation type4: Flaxland |
N |
N |
| VEG4PC |
Veg4 forest % |
Percentage area of veg4 within planning unit |
N |
N |
| VEG5 |
Veg5 forest area |
Area (ha) within planning unit of vegetation type5: Forest Harvested |
N |
N |
| VEG5PC |
Veg5 forest % |
Percentage area of veg5 within planning unit |
N |
N |
| VEG6 |
Veg6 forest area |
Area (ha) within planning unit of vegetation type6: Gorse and Broom |
N |
N |
| VEG6PC |
Veg6 forest % |
Percentage area of veg6 within planning unit |
N |
N |
| VEG7 |
Veg7 forest area |
Area (ha) within planning unit of vegetation type7: Grey Scrub |
N |
N |
| VEG7PC |
Veg7 forest % |
Percentage area of veg7 within planning unit |
N |
N |
| VEG8 |
Percentage area of veg7 within planning unit |
Area (ha) within planning unit of vegetation type8: Indigenous Forest |
N |
N |
| VEG8PC |
Veg8 forest % |
Percentage area of veg8 within planning unit |
N |
N |
| VEG9 |
Veg9 forest area |
Area (ha) within planning unit of vegetation type9: Major Shelterbelts |
N |
N |
| VEG9PC |
Veg9 forest % |
Percentage area of veg9 within planning unit |
N |
N |
| VEG10 |
Veg10 forest area |
Area (ha) within planning unit of vegetation type10: Manuka and or Kanuka |
N |
N |
| VEG10PC |
Veg10 forest % |
Percentage area of veg10 within planning unit |
N |
N |
| VEG11 |
Veg11 forest area |
Area (ha) within planning unit of vegetation type11: Other Exotic Forest |
N |
N |
| VEG11PC |
Veg11 forest % |
Percentage area of veg11 within planning unit |
N |
N |
| VEG12 |
Veg12 forest area |
Area (ha) within planning unit of vegetation type12: Pine Forest - Closed Canopy |
N |
N |
| VEG12PC |
Veg12 forest % |
Percentage area of veg12 within planning unit |
N |
N |
| VEG13 |
Veg13 forest area |
Area (ha) within planning unit of vegetation type13: Pine Forest - Open Canopy |
N |
N |
| VEG13PC |
Veg13 forest % |
Percentage area of veg13 within planning unit |
N |
N |
| VEGX |
VegX forest area |
Area (ha) within planning unit of vegetation type1: Combined exotic forest = veg2 + veg5 + veg11 + veg12 + veg13 |
N |
N |
| VEGXPC |
VegX forest % |
Percentage area of VegX within planning unit |
N |
N |
| XPROT80_HA |
Area outside PROT80 (ha) |
Area (ha) of planning unit that lies outside the protected area layer (DOC estate etc.) |
N |
N |
| XPROT_PC |
Percentage area outside PROT80 |
Percentage area of planning unit that lies outside the protected area layer (DOC estate etc.) |
N |
N |
| STREAM_LENGTH |
Stream segment length (m) |
Total length (m) of REC stream segments within planning unit |
N |
N |
| STREAM_SHADE80 |
Total length (m) of REC stream segments within planning unit |
Total length (m) of REC stream segments having FENZ segshade >=80% within planning unit |
N |
N |
| STREAM_SHADE80_PC |
Stream length with riparian shade (%) |
Percentage length of REC stream segments having FENZ segshade >=80% within planning unit |
N |
N |
| STREAM_LENGTH_XPROT |
Stream length outside PROT80 (m) |
Total length (m) of REC stream segments within planning unit: Includes only those portions of REC streams outside the Prot80 protection area |
N |
N |
| STREAM_SHADE80_XPROT |
Riparian shade length outside PROT80 (m) |
Total length (m) of REC stream segments having FENZ segshade >=80% within planning unit: Includes only those portions of REC streams outside the Prot80 protection area |
N |
N |
| STREAM_SHADE80_PC_XPROT |
Riparian shade length outside PROT80 (%) |
Percentage length of REC stream segments having FENZ segshade >=80% within planning unit: Includes only those portions of REC streams outside the Prot80 protection area |
N |
N |
| PROT_COST |
Protection cost |
Protection cost factor (see NIWA report doc#1460478) |
N |
N |
| ANGDIE |
Species score (0-1) |
Modelled prediction for Longfin Eel (see NIWA report doc#1460478) |
N |
N |
| GALARG |
Species score (0-1) |
Modelled prediction for Giant Kokopu (see NIWA report doc#1460478) |
N |
N |
| GALPOS |
Species score (0-1) |
Modelled prediction for Shortjaw Kokopu (see NIWA report doc#1460478) |
N |
N |
| GEOAUS |
Species score (0-1) |
Modelled prediction for Lamprey (see NIWA report doc#1460478) |
N |
N |
| PARPLA |
Species score (0-1) |
Modelled prediction for Koura (see NIWA report doc#1460478) |
N |
N |
| HOCH |
Species score (0-1) |
Modelled prediction Hochstetter’s Frog for (see NIWA report doc#1460478) |
Y |
N |
| BLUEDUCK |
Species score (0-1) |
Modelled prediction for Blue Duck (see NIWA report doc#1460478) |
Y |
N |
| RARE_SPP_S |
Species score (0-1) |
Modelled prediction for combined rare species (see NIWA report doc#1460478) |
N |
N |
| ENV_Z |
Environmental score - Z |
Zonation analysis of Environmental Classes: core area Zonation (CAZ) - see NIWA report doc#1460478 |
N |
N |
| ENV_ZC |
Environmental score - ZC |
Zonation analysis of Environmental Classes: CAZ + connectivity constraints - see NIWA report doc#1460478 |
N |
N |
| ENV_ZPC |
Environmental score - ZPC |
Zonation analysis of Environmental Classes: CAZ + connectivity constraints + pressures - see NIWA report doc#1460478 |
N |
N |
| ENV_ZPC_PR |
Environmental score – ZPC-Cons |
Zonation analysis of Environmental Classes: as for ZPC but favours planning units with >=80% area protected for conservation - see NIWA report doc#1460478 |
N |
N |
| FISH_ZPC |
Fish score - ZPC |
Zonation analysis of predicted Fish Distributions: CAZ + connectivity constraints + pressures - see NIWA report doc#1460478 |
N |
N |
| FISH_Z |
Fish score - Z |
Zonation analysis of predicted Fish Distributions: core area zonation (CAZ) - see NIWA report doc#1460478 |
N |
N |
| FISH_ZPC_P |
Fish score – ZPC-Cons |
Zonation analysis of predicted Fish Distributions: as for ZPC but favours planning units with >=80% area protected for conservation - see NIWA report doc#1460478 |
N |
N |
| FISH_ZC |
Fish score - ZC |
Zonation analysis of predicted Fish Distributions: CAZ + connectivity constraints - see NIWA report doc#1460478 |
N |
N |
| NT_3RD_ZPC |
National ranking |
National rankings for 3rd order planning units summarized against 2nd order planning units (as per ENV-ZPC) - see NIWA report doc#1460478 |
N |
N |
| GEOMETRY |
|
|
N |
N |