425D0AE7-9794-48B9-A073-67499CFF27A6 dataset Ministry for the Environment Wellington 2022-11-21T13:21:55 ISO 19139 Geographic Information - Metadata - Implementation Specification 2007 576689 2193 EPSG 7.9.4(9.0.0) REC New Zealand REC, river, network, environment, classification 2004-01-01 2010-04-01 2006-01-01 Crown Copyright 2004 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. 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. Koordinates.com http://koordinates.com New Zealand ANZLIC Jurisdictions 2008-10-29 Version 2.1 2008-10-29 http://asdd.ga.gov.au/asdd/profileinfo/anzlic-jurisdic.xml#anzlic-jurisdic ANZLIC the Spatial Information Council WATER-Surface WATER-Rivers WATER-Hydrology ANZLIC Search Words 2008-05-16 Version 2.1 2008-05-16 http://asdd.ga.gov.au/asdd/profileinfo/anzlic-theme.xml#anzlic-theme ANZLIC the Spatial Information Council Ministry for the Environment (New Zealand) Licensed under Creative Commons Attribution 3.0 New Zealand. inlandWaters environment Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270 true 166.26544 179.46253 -47.413777 -34.275777 ANZMet Lite Country codelist 2009-03-31 Version 1.0 2009-03-31 http://asdd.ga.gov.au/asdd/profileinfo/anzlic-country.xml#Country ANZLIC the Spatial Information Council nzl SDE Feature Class Koordinates.com http://koordinates.com http://koordinates.com series 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