Melbourne Waterway Research-Practice Partnership, Waterway Ecosystem Research Group, School of Ecosystem and Forest Sciences, The University of Melbourne, Burnley 3121, Victoria Australia
Version 1.1. 16 September 2020
The Melbourne Water Stream Network represents the flow paths and catchments of the streams and rivers of the Greater Melbourne Region (the region managed by Melbourne Water). The Network is a spatial dataset that :
improves the accuracy of stream alignments and extent throughout the region beyond existing stream maps;
uses existing stream line data from several sources, ensuring downstream connectivity of lines, correcting delineation errors and augmenting the network to include small headwater streams missing from earlier stream data;
standardises names of streams across the region, giving each stream a unique name and code;
splits the stream lines into reaches at confluences and between confluences so that reaches are almost all less than 500 m long;
provide a unique meaningful code for each reach, linked to existing codes such as Melbourne Water’s asset identifiers;
delineates a subcatchment boundary derived from a 5-m digital elevation model for each reach;
is stored as two shapefiles (streams and subcatchments), and also as a spatial database structured to permit (with associated R functions) rapid calculation of upstream catchment statistics, such as land-use fractions, and rapid derivation of catchment boundaries. These functions can also be used through an application on the web.
Citation (for this report and for the use of any data downloaded from https://tools.thewerg.unimelb.edu.au/mwstr/: this site provides a direct interface to the data)
Kunapo, J., Walsh, C.J., Sammonds, M.J. (2020) The Melbourne Water Stream Network. Version 1.1. Melbourne Waterway Research-Practice Partnership Report 19.4a. School of Ecosystem and Forest Sciences, The University of Melbourne, Melbourne. URL: https://tools.thewerg.unimelb.edu.au/mwstr/.
This document describes the structure of the Melbourne Water Stream Network dataset and provides illustrations of how to extract data from the dataset. The data are available in several forms (Table 1), with the most flexible for data extraction being a relational postgreSQL spatial database that can be accessed through the software program R using a library of functions. Currently this can only be accessed through the University of Melbourne network. However, a web application provides a simple interface for extracting data from the database. All data can be accessed through the web application at tools.thewerg.unimelb.edu.au/mwstr/.
Version 1.1 improves on Version 1.0 in many ways that are detailed in Appendix 21.
Table 1. Melbourne Water stream network data components, structures and locations for access. The zip file containing shapefiles does not include the all-upstream and all-downstream arrays, nor the cats layer, all of which are too large to be included in this format.
The tables of the database and their relationships are illustrated in Fig. 1. Each of the tables is described below.
Fig. 1. Table relationship diagram for the mwstr database, showing all fields in each table and connections between tables. Those with a geometry field are spatial tables. The ‘coast’ table is a polyline spatial table for adding a coast line to any stream-line maps.