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TitleWetland sediment input sub-index
CustodianWater and Marine Resources Division, Department of Primary Industries, Parks, Water and Environment
CreatorSteve Carter, Environmental Dynamics
DescriptionAn index which rates the impact of sediment input on waterbodies as a direct result of land disturbance in the catchment.
Input data
Lineage
The supply of sediment to freshwater ecosystems is strongly associated with impacts within their upstream and surrounding catchments. To reflect this, the variable used as a surrogate for sediment input was catchment disturbance. This data represented sediment input as a direct input into the wetland N-score expert rule system.
Date createdNovember 2004
Scale and coverage1:25 000; Statewide
Column headingWL_SEDIN
Type of dataContinuous but has been converted to categorical format (see Table 1).
Number of classes5
Assigning values to ecosystem spatial units
The catchment disturbance data for wetlands (WL_CATDI) was directly assigned to the wetland spatial units as WL_SEDIN.
The wetlands spatial data layer had the continuous sediment input data categorised according to Table 1. The categorical data was used for reporting and mapping purposes.
Table 1. Sediment input categories for wetlands.
Category | Min to max values |
1 | 0 to <0.2 |
2 | 0.2 to <0.4 |
3 | 0.4 to <0.8 |
4 | 0.8 to <1 |
5 | 1 |
CFEV assessment framework hierarchy