The ISC2004_SCORES dataset represents the 2004 Index of Stream Condition (ISC) overall score and subindex scores for each ISC river reach in the state of Victoria. This was the second ISC assessment providing a snapshot of river health for major rivers and streams in Victoria, using data collected over a five-year period from 1999 to 2004. The methods used in 2004 differed to the 1999 assessment. Method changes were undertaken to strike a balance between incorporating new scientific advances while maintaining compariability of results with the 1999 benchmark. The 2004 ISC provides scores for five components of stream condition: (i) hydrology (based on change in volume and seasonality of flow from natural conditions); (ii) physical form (based on bank stability, influence of artificial barriers, and abundance and origin of coarse woody debris); (iii) streamside zone (based on types of plants; spatial extent, width, and intactness of riparian vegetation); (iv) water quality (based on an assessment of phosphorus, turbidity, electrical conductivity and pH); and (v) aquatic life (based on number of families of macroinvertebrates). Further information available at: https://www.water.vic.gov.au/waterways-and-catchments/rivers-estuaries-and-waterways/monitoring
Search Words:
Inland waters
Publication Date:
25 October 2019
Dataset Status:
All wetlands with an area of 1 hectare or more should be present.
Monitored segments of Victorian waterways
Progress:
Completed
Access Constraint:
Creative Commons Attribution 4.0 (CC-BY)
(
License Text
)
Access subject to custodial approval.
Data Existence:
Metadata Name
Descriptions
Resource Name:
ISC2004_SCORES
Title:
2004 Index of Stream Condition Scores
Anzlic ID:
ANZVI0803008552
Custodian:
Owner:
Jurisdiction:
Victoria
Abstract:
The ISC2004_SCORES dataset represents the 2004 Index of Stream Condition (ISC) overall score and subindex scores for each ISC river reach in the state of Victoria. This was the second ISC assessment providing a snapshot of river health for major rivers and streams in Victoria, using data collected over a five-year period from 1999 to 2004. The methods used in 2004 differed to the 1999 assessment. Method changes were undertaken to strike a balance between incorporating new scientific advances while maintaining compariability of results with the 1999 benchmark. The 2004 ISC provides scores for five components of stream condition: (i) hydrology (based on change in volume and seasonality of flow from natural conditions); (ii) physical form (based on bank stability, influence of artificial barriers, and abundance and origin of coarse woody debris); (iii) streamside zone (based on types of plants; spatial extent, width, and intactness of riparian vegetation); (iv) water quality (based on an assessment of phosphorus, turbidity, electrical conductivity and pH); and (v) aquatic life (based on number of families of macroinvertebrates). Further information available at: https://www.water.vic.gov.au/waterways-and-catchments/rivers-estuaries-and-waterways/monitoring
Search Words:
Inland waters
Purpose:
This dataset communicates the 2004 Index of Stream Condition overall index score, condition rating and the five ISC sub-index scores for physical form, streamside zone, hydrology, water quality, aquatic life.
Geographic Extent Polygon:
Geographic Bounding Box:
-34
141
150
-39
Beginning to Ending Date:
2004-01-01 - 2004-01-01
Maintainence and Update Frequency:
Not planned
Stored Data Format:
Available Format(s) Types:
Feature Class
Positional Accuracy:
+/- 70m
Attribute Accuracy:
The UniqueID that describes the Basin, Reach and Section Number for each waterway is complete for every Section but ID numbers were not consistent with that used by past ISC benchmarks in all rivers. UniqueID_1999, UniqueID_2004 and UniqueID_2010 are included to join this dataset to past ISC. Scores were obtained in digital form indexed by UniqueID so are believed to be correct.
Logical Consistency:
Scores from the 2004 ISC can be joined to the earlier ISC1999_Scores and later ISC2010_Scores data sets using the UniqueID_1999 and UniqueID_2010 attributes respectively which account for differences in the numbering of ISC reaches among years.
Data Source:
Dataset Source: Scores and linework obtained from the Index of Condtion website (now offline). This data set replaces and adds attribute data (ISC scores) to the 2004 ISC river line mapping that was previously available as the data set ISC_REACH.
Dataset Originality: Derived
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