3.7.3. Fishing Activities
The land suitability for fishing activities is not specifically discussed in this research, because it can be assumed that everyone can do fishing in all parts
of the coasts. Hence, it is the last alternative to be done.
Table 3.8. Matrix of suitability for fishing activities
Categorize and scoring
No Variable
Unit
S1 Highly Suitable
S2 Suitable
S3 Marginally Suitable
N Not Suitable
1. Water clearness
- -
- 2. Tidal
wave -
- -
3. Tidal Height
- -
- 4. Salinity
Suitable for all conditions
- - -
Source: Sunarto, et al 1997, Kep-02MENKLHI1998, with modification
3.8. Land Suitability Analysis
Land suitability analysis in Maros including land suitability for tourism area, marine aqua culture seaweed, fishpond, keramba jaring apung, and fishing
activities was done based on physical criteria. There are 4 steps GIS analysis conducted, they are
1 creating land-use classification map, 2 creating matrix of suitability for any activities that will be performed,
3 scoring and weighting, 4 spatial analysis to obtain suitable area for any activities performed.
Many recommended results will be produced, but only the best recommended will be used to coastal development. Therefore, spatial multi
criteria decision making SMCDM analysis will be performed to find the best alternative map.
37
Buffer and Uses Zones
Physical Suitable area for Tourism
Physical Suitable area for Aqua
Cultivation
Physical Suitable area for Fishing
Activities
Suitable area for Tourism
Suitable area for Aqua Cultivation
Suitable area for Fishing Activities
Ex:
Current Velocity Sechi Disk Depth
Temperature Salinity
Oxygen Demand PH
Depth Water
Suitable Area for Marine Aqua Cultivation
Seaweed
Buffer and Uses Zones
Physical Suitable area for Tourism
Physical Suitable area for Aqua
Cultivation
Physical Suitable area for Fishing
Activities
Suitable area for Tourism
Suitable area for Aqua Cultivation
Suitable area for Fishing Activities
Ex:
Current Velocity Sechi Disk Depth
Temperature Salinity
Oxygen Demand PH
Depth Water
Suitable Area for Marine Aqua Cultivation
Seaweed
Current Velocity Sechi Disk Depth
Temperature Salinity
Oxygen Demand PH
Depth Water
Suitable Area for Marine Aqua Cultivation
Seaweed
Fig 3.4. Land Suitability Processing
3.9. Weighting and Scoring Land Suitability Classes
Scoring of each theme uses weighting value. Weight for each theme is given, starting from important to less important level. Every theme is divided into
several classes according research area. Finally, every class has final value multiplication of scoring and weighting factor result from themes.
Determination of criteria, scoring and weighting value are based on some previous researches. Scoring and weighting value are through index overlay
model approach Bonham – Carter, 1994. This model has assessment that weight is given for every layer and a score is also given for every class in one
coveragelayer. Multiplication of scoring and weighting values in coverage is appropriated by importance level to determine suitable area.
Mathematical Equation: ….
2
W
i
S
x = ∑n
i
S
ij ∑n
j
W
i
38
Where: Sx : Weighting index from polygon selected
Sij : Number of class j from map i
Wi : Weighting for coverage layer i
n : Number of map
Index overlay value shows suitability area level, which the final result is a list of ranking of suitable area classes. Its classes are: S1 highly Suitable, S2
suitable, S3 marginally suitable, and N not suitable. Suitable area class is based on range of suitability index value. One map has all variable above, which
every variable is given score 4 for S1, 3 for S2, 2 for S3 and 1 for N. Land has overlay index value among 4, 3, 2 and 1 that is considered
random combinations from suitability matrix variable on overlay process, so it needs to perform site suitability analysis SQL for obtaining land suitability.
After SQL analysis is done, the next step is compiling overlay result into land suitability class. The equation used is as follows:
…….. 3
S
max –
S
min
S
l =
n
Where: Sl : Land suitability class range
Smax : Highest overlay index value
Smin : Lowest overlay index value
n : Number of class
3.10. Framework of Coastal Development Decision Making 3.10.1. Landuse Priority Analysis