REC New Zealand
The REC groups rivers and parts of river networks that share similar ecological characteristics, including physical and biological. Rivers that share the same class can be treated as similar to one another and different to rivers in other classes. The REC classification system groups rivers according to several environmental factors that strongly influence or cause the rivers’ physical and ecological characteristics (climate, topography, geology and land cover). Stream order is the numerical position of a tributary or section of a river within the entire network. Headwater streams are assigned a stream order of 1. When two tributaries of the same stream order meet, the order increments by one for the next section downstream. However, if two sections meet where one section has higher order than the other, the next section downstream has the same order as the highest upstream section.
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Citation proposal
(2010) . REC New Zealand. https://dc.niwa.co.nz:/niwa_dc/srv/api/records/425D0AE7-9794-48B9-A073-67499CFF27A6 |
Simple
- Alternate title
- REC, river, network, environment, classification
- Date ( Creation )
- 2004-01-01
- Date ( Publication )
- 2010-04-01
- Date ( Revision )
- 2006-01-01
- Presentation form
- Digital map
- Other citation details
- Crown Copyright 2004
- Purpose
- REC classes can be used to stratify monitoring sites within a region and as a basis for reporting environmental data. The characteristics of each class can be used to make management decisions in a rational and meaningful way for the class as a whole. The REC provides a basis for resource managers to develop strategic policy using rational and justifiable information in the absence of specific detailed information for each river.
Point of contact
- ANZLIC Jurisdictions ( Theme )
-
- New Zealand
- ANZLIC Search Words ( Theme )
-
- WATER-Surface
- WATER-Rivers
- WATER-Hydrology
- Use limitation
- Ministry for the Environment (New Zealand)
- Use limitation
- Licensed under Creative Commons Attribution 3.0 New Zealand.
- Spatial representation type
- Vector
- Metadata language
- English
- Character set
- UTF8
- Topic category
-
- Inland waters
- Environment
- Environment description
- Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270
N
S
E
W
- Geographic identifier
-
nzl
- Date ( Publication )
- 2009-03-31
- Edition
- Version 1.0
- Edition date
- 2009-03-31
Point of contact
- Reference system identifier
- EPSG / 2193 / 7.9.4(9.0.0)
- Topology level
- Geometry only
- Geometric object type
- Composite
- Geometric object count
- 576689
- Distribution format
-
- SDE Feature Class ()
Distributor
Point of contact
- OnLine resource
- http://koordinates.com
- Other
- series
- Statement
- The REC represents rivers as networks of sections including their upstream catchments. Sections have an average length of 700 metres. The class of each section is based on an evaluation of six factors. The first four factors are the climate, topography, geology and land cover of the upstream catchment of individual sections of the river network. The last two factors are the Network-Position and the landform of the valley of each section of the network. Each factor is subdivided into categories that discriminate variation in characteristics. Choice of categories has been guided by scientific knowledge of the causes of patterns in characteristics of rivers at different spatial scales. The higher levels of the REC discriminate large-scale patterns in general characteristics. The lower the level of the classification used, the smaller the scale of the patterns that are defined by REC. Each level of the REC hierarchy is based on differences in a set of processes (for example hydrological processes) that are assumed to be the cause of patterns in physical and biological characteristics at a typical spatial scale. The River Environment Classification User Guide contains a comprehensive guide to the REC databases and uses. Updated in May 2010. ISBN 0-478-18919-2 ME Number 499
gmd:MD_Metadata
- File identifier
- 425D0AE7-9794-48B9-A073-67499CFF27A6 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
- dataset
- Date stamp
- 2022-11-21T13:21:55
- Metadata standard name
- ISO 19139 Geographic Information - Metadata - Implementation Specification
- Metadata standard version
- 2007
Point of contact
Overviews
Provided by
Views
425D0AE7-9794-48B9-A073-67499CFF27A6
Access to the portal
Read here the full details and access to the data.
Associated resources
Not available
NIWA - Metadata Catalogue