Table 2 Details of slope failure number and per cent by area (ha) for each of the classification types used to define the study area
Classification | Area assessed | Slope failures | Failures per hectare | ||
|---|---|---|---|---|---|
| Â | ha | % | Number | % | Â |
Land use | Â | Â | Â | Â | Â |
Exotic Forest | 2139 | 30.6 | 36 | 4 | 0.02 |
Indigenous Forest | 2684 | 38.4 | 394 | 42 | 0.15 |
Secondary Indigenous Regrowth | 859 | 12.3 | 210 | 23 | 0.24 |
Exotic Cutover 1992/93 | 115 | 1.6 | 86 | 9 | 0.75 |
Exotic Cutover 1993/94 | 213 | 3.1 | 109 | 12 | 0.51 |
Exotic Cutover 1994/95 | 263 | 3.8 | 83 | 9 | 0.32 |
Pasture (hill country) | 375 | 5.4 | 13 | 1 | 0.03 |
Pasture (floodplain) | 336 | 4.8 | 0 | 0 | 0 |
TOTAL | 6984 | 100 | 931 | 100 | Â |
Slope Group | Â | Â | Â | Â | Â |
A (0–3°) | 306.5 | 4.4 | 0 | 0 | 0 |
D (16–20°) | 361.6 | 5.2 | 9 | 1 | 0.02 |
E (21–25°) | 1623.3 | 23.2 | 239 | 25.5 | 0.15 |
F (26–35°) | 4493.9 | 64.3 | 679 | 73 | 0.15 |
G (>35°) | 198.7 | 2.9 | 4 | 0.5 | 0.02 |
TOTAL | 6984 | 100 | 931 | 100 | Â |
LUC unit | Â | Â | Â | Â | Â |
IIs | 306.5 | 4.4 | 0 | 0 | 0 |
IIIe | 183.1 | 2.6 | 0 | 0 | 0 |
VIe2 | 148.8 | 2.1 | 2 | 0.2 | 0 |
VIe3 | 212.8 | 3.0 | 7 | 0.8 | 0.03 |
VIe8 | 465.9 | 6.7 | 36 | 3.9 | 0.08 |
VIe10 | 1403.7 | 20.1 | 123 | 13.2 | 0.09 |
VIe11 | 2071.1 | 29.7 | 478 | 51.3 | 0.23 |
VIIe2 | 1882.7 | 27.0 | 264 | 28.4 | 0.14 |
VIIe7 | 110.7 | 1.6 | 17 | 1.8 | 0.15 |
VIIe8 | 191.8 | 2.7 | 4 | 0.4 | 0.02 |
VIIe9 | 6.9 | 0.1 | 0 | 0 | 0 |
TOTAL | 6984 | 100 | 931 | 100 | Â |
Catchment | Â | Â | Â | Â | Â |
Opitonui | 1538 | 22.0 | 83 | 9 | 0.05 |
Awaroa | 1168 | 16.7 | 94 | 10 | 0.08 |
Owera | 1365 | 19.6 | 402 | 43 | 0.29 |
Weiti | 910 | 13.0 | 160 | 17 | 0.18 |
Miscellaneous | 2003 | 28.7 | 192 | 21 | 0.09 |
TOTAL | 6984 | 100 | 931 | 100 | Â |