Current metrics
Exceeds threshold
28.1%
Proportion of area of interest exceeding the 15% threshold (1.1 ha).
Within threshold
71.9%
Proportion of area of interest within the 15% threshold (2.8 ha).
Critical erosion risk
0.5 ha
Amount of area within the highest exceedance band (>=30%).
Priority sites
5
Field check required.
Slope distribution and interpretation
15-20%
20-25%
25-30%
>=30%
28.1% of AOI exceeds the 15% threshold
1.08 ha of the 3.86 ha AOI exceeds the slope threshold. Industry benchmarks typically target <10% exceedance for stable revegetation on rehabilitated surfaces.
Highest exceedance band (>=30%): 0.54 ha - elevated erosion risk
Slopes in the highest exceedance band carry increased erosion risk regardless of ground cover. Physical intervention - rock armouring, erosion matting, or regrading - is recommended before revegetation in these areas.
71.9% of AOI within threshold
The majority of the site is below the erosion threshold and suitable for standard revegetation management without additional earthworks.
Summary map and table
Priority 1
Priority 2
Priority 3
Priority 4
Priority 5
| Zone | Area (ha) | Exceeds (%) | Index | Dominant category | Severity |
|---|---|---|---|---|---|
| Polygon 1 | 0.63 | 46.0% | 1.32 | >=30% | Moderate exceedance |
| Polygon 2 | 0.63 | 2.5% | 0.04 | 15-20% | Mild exceedance |
| Polygon 3 | 0.63 | 3.0% | 0.04 | 15-20% | Mild exceedance |
| Polygon 4 | 0.63 | 19.2% | 0.57 | >=30% | Moderate exceedance |
| Polygon 5 | 0.63 | 64.2% | 1.84 | >=30% | Substantial exceedance |
| Polygon 6 | 0.63 | 33.7% | 0.96 | >=30% | Moderate exceedance |
Priority sites
Priority sites for field check
1
Priority
Max Slope
237.75%
Avg Slope
52.45%
Excess
+37.45%
19.92174°S, 145.74724°E
2
Priority
Max Slope
173.99%
Avg Slope
46.64%
Excess
+31.64%
19.92035°S, 145.74930°E
3
Priority
Max Slope
173.99%
Avg Slope
47.93%
Excess
+32.93%
19.92043°S, 145.74911°E
4
Priority
Max Slope
200.37%
Avg Slope
46.25%
Excess
+31.25%
19.92151°S, 145.74917°E
5
Priority
Max Slope
240.93%
Avg Slope
54.68%
Excess
+39.68%
19.91858°S, 145.75001°E
Scope note
This report summarises slope exceedance indicators derived from mapped topographic surfaces and threshold-based area calculations. These outputs help prioritise locations for field review and erosion-risk intervention, but they do not by themselves establish causation, geotechnical stability, rehabilitation success, or a complete management prescription. In the absence of LiDAR data, areas with dense vegetation may show inaccurate slope classifications. Ground verification, local drainage context, and site-specific engineering judgement should be considered alongside this report before intervention decisions are finalised.