Sustainable Rivers Audit Zone Layer
URL: https://library-mdba.opendata.arcgis.com/datasets/70cbf79932e34b938a3ca2c02c5be083_0/explore
In the process of constructing the SRA valley zones, the 23 SRA valleys were first defined based on the Australian Water Resources Council (AWRC) catchment layer, with alteration being done using the following principles:
-
Where possible, valley boundaries were mapped along areas of highest elevation (ridges).
-
Where possible, river channels and State borders were not used to define the boundaries of a valley ("one river" principle).
-
Larger areas with vastly differing hydrology/climate/geomorphology were not combined.
-
The hydrology's of combined valleys/zones were linked.
-
The much larger River Murray was divided into several valleys.
After constructing the valleys, they were then subdivided into zones. These zones correspond to one of seven different categories: Montane, Upland, Slopes, Lowland, Upper, Middle, Lower and Mt Lofty.
Four of these zones are based on altitude boundaries as below: Lowland (<200m above sea level) Slopes (200–400m above sea level) Upland (400–700m above sea level) Montane (>700m above sea level) however as three valleys (Lower Murray, Lower Murray and Darling) are fully within the <200m category, other criteria were used to develop zones.
This resulted in zones which are defined as pseudo geormophology zones: Upper, Middle, Lower and Mt Lofty. Descriptions of each of these zones is unique to each valley and held in tblzone in the SRA database. Although seven zones have been identified, the number of zones in each valley will vary.
There are no views created for this asset yet.