Table 1 classification of zones for Thailand's National park
symbol Name Zone Purpose
IUZ Intensive use zone Areas that provide centralized visitor and staff service as well as park administration
ORZ Outdoor recreation Zone Areas that provide outdoor opportunities and facilities including nature study.
PZ Primitive Zone Areas that represent natural environments and serve as waterrechage area . Outdoor recreation is limited.
SNRZ Strict Nature Zone Areas that consist of special and rare biological sites and also preserved as watershed. Outdoor recreation is limited except for research.
RZ Recovery Zone Areas that have been degraded or destroyed by ecological recovery is necessary to protect the remaining intact areas.
Soruce: National Parks Division(1987)

Table 2 ranking Score of Park Zoning
Factor Rating Score for each Zone
IUZ(r1) ORZ (r2) P2(r3) SMRZ(R4) RZ (r5)
VEGETATION
Hill evergreen forest 1 2 3 3 1
Dry deciduous forest 1 2 2 2 1
Mixed Deciduous Forest 1 2 3 3 1
Pine and Grassland 1 2 3 3 1
Secondary Growth 1 2 3 3 1
Agriculture area 1 2 3 3 1
GEOLOGY
Phu Phan Formation 1% 1 2 3 3 1
Sao khua formation 2% 1 2 3 3 1
Phra Wihan formation 3% 1 1 3 3 2
phu Kradung formation 4% 1 2 3 3 1
SOIL
0-50 cm SL with gravel Content 1 2 3 3 1
80-100 cm SL 1 2 3 3 1
0-50 cm SCL 1 2 3 3 1
100-150 cm SCL 1 2 3 3 1
80-100 cmLS, SI surface soil scl subsoil 3 3 2 2 2
80-100 cm, LC,CL Surface soil CL, C subsoil 1 1 3 3 2
SLOPE
0-2% 1 2 3 3 1
2-6% 1 2 3 3 1
6-13% 1 2 3 3 1
13-25% 1 2 3 3 1
25-55% 1 3 3 1 1
>55% 1 2 3 3 1
ELEVATION
<700M 1 2 3 3 1
700-900m 1 2 3 3 1
900-1100m 1 2 3 3 1
>1100 1 2 3 3 1
PROXIMITY TO WATER
Stream Gully 1 2 3 3 1
0-100m        0-50m 1 2 3 3 1
100-200m    50-100m 1 2 3 3 1
>200m          >100m 1 2 3 3 1
PROXIMITY TO ROAD
Road Trail 1 2 3 3 1
0-50m        0-20m 1 2 3 3 1
50-150m     20-100m 1 2 3 3 1
>150m         >100m 1 2 3 3 1
WILDLIFE HABITAT
Rare Species 1 2 3 3 1
Common Species 1 2 3 3 1
Abundant Species 1 2 3 3 1
Not Habitat 1 2 3 3 1

Table 3 Weighting Score of park Zoning Model
Factor IUZ ORZ PZ SNRZ RZ Significant for
Vegetation 6.2 7.7 8.7 8.2 8.5 PZ, SNRZ, RZ
Geology 6.1 7.0 4.2 4.5 5.5 ORZ
Soil 6.7 6.0 4.0 3.7 7.0 RZ
Slope 8.7 8.2 5.2 4.7 4.5 IUZ,ORZ
Elevation 7.5 6.9 4.2 4.2 4.0 IUZ
Water 9.4 7.5 4.1 3.0 5.7 IUZ
Access 9.7 8.2 2.6 2.1 4.6 IUZ , ORZ
Wildlife Hab 5.0 8.0 8.1 9.6 8.1 SNRZ
Total 59.3 59.5 41.1 40.0 47.9 -