Spatial Analysis Data Analysis

V. RESULTS AND DISCUSSION

5.1. Data Analysis

5.1.1. Spatial Analysis

Coral Reef Conservation Area Conservation means protecting something from changer or destruction while permitting its wise use. It thus involves managing the use of natural resources so that can benefit from them now without damaging the possible benefits they can provide in the future UNEP, 1998. There is a lot of coral reef in marine area of Ndana Island. Condition of coral is variety and particularly soft corals. Type of fish is variety too which sharks and rays relatively common. According to Anonym 2005 the best condition of coral reef in north part of Ndana Island and percentage of coral reef 25 - 50. This condition is fair class of coral reef. Based on Yap and Gomez 1988 in Angkotasan 2003, there four classes in coral reef classification i.e.: 24.9 is poor, 25 – 49.9 is fair, 50 – 74.5 is good and 75 – 100 is well class. Parameters that had been used for suitability analysis of coral reef conservation area are ecological aspect, such as condition of coral reef, distance from beach, slope, salinity and sea surface temperature; economy aspect: number of economy activity; and social aspect: number of tourism area, number of special species aesthetic value and distance from settlement. The requirement criteria were in attribute of shape file that has been obtained by overlaying shape files of nine parameters union function in Geoprocessing wizard and query analysis using ArcView 3.3. Based on spatial analysis in marine area of Ndana island, there are four classes for conservation zone that are S1, S2, S3, and N. According to Angkotasan 2003, highly suitable class S1 for core zone, moderately suitable S2 for buffer zone, marginally suitable S3 for use zone and not suitable N for non-conservation area. Area and percentage of every class can be seen in Table 11 and the result of mapping suitability area for coral reef conservation is presented in Figure 12. Table 11. Area and percentage of coral reef conservation No. Class Area hectares Percentage 1. Core zone 17.95 0.29 2. Buffer zone 187.42 3.01 3. Use zone 4700.61 75.58 4. Non-conservation 1313.23 21.12 Total of marine area 6,219.21 100 Result of analysis show that only 0.29 is highly suitable and this area should be for coral reef conservation area, not used for other applications. Highly suitable is located in east part of Ndana Island. 78.59 of Ndana Island is suitable area for buffer and use zones. It means that condition for conservation is at marginal level. This area can be analyzed for sea tourism diving suitability. Non suitable area for conservation is location at north part of Ndana Island and near Rote Island. It can be used for seaweed cultivation. Diving Suitability Parameters for diving suitability are water clarity, percentage of life coral, variation of coral, variation of fish, current velocity and depth of water and every 44 criterion should be have scores and weight. The main factor of diving suitability has the highest weight that is water clarity. Determination of score and weight of each criterion depend on the criteria affecting diving based on literature judgment. Results from spatial analysis of these parameters were then needed to overlay with buffer and use zone of coral reef conservation area. Area suitability was divided into four classes highly suitable, moderately suitable, marginally suitable and not suitable. There are two classes for diving in Ndana Island i.e.: S2 moderately suitable and S3 marginally suitable and it were not found the highly suitable S1. Area of moderately suitable is 31.33 hectares and 146.27 hectares is marginally suitable Table 12. Moderately suitable is located at south part of Ndana Island while marginally suitable north and west part of Ndana Island. Seaweed Cultivation Suitability Parameters for seaweed cultivation are current velocity, substrate on bottom sea, pH, depth of water, salinity and sea surface temperature. After overlaying the shape file of all of suitability parameters then overlay with non- conservation area. Result of spatial analysis all the non-conservation is moderately suitable S2 for seaweed cultivation. The area covers 1,313.23 hectares Table 12. There were no results for highly suitable S1, marginally suitable S3 and not suitable N classes. It means that seaweed cultivation can be put into practice in Ndana Island. Seaweed cultivation in the moderate class has to refer to the score of each criterion. It should be examined whether the criteria having low score are possible to be improved. This location has low score in current velocity criteria. The result 45 46 of mapping suitability area for diving and seaweed cultivation is presented in Figure 13 and 14. These results are suitable for present condition that outcome from availability of data. In this study need more attention for current velocity data because the data source from scale 1:250,000. Table 12. Area of diving and seaweed cultivation suitability Class Diving ha Seaweed cultivation ha S1 0 S2 31.33 1,313.23 S3 146.27 N 0 Total 177.60 1,313.23 Table 12 shows total area of diving and seaweed cultivation from analysis of suitability. Although there are 4,888.03 hectares of buffer and use zones of conservation suitability see Table 11, but suitable area for diving activities only 177.60 hectares. Criteria of diving suitability need percentage of life coral, variation of coral and variation of fish data so only live coral reef area suitable for diving. There are 196.64 hectares of live coral reef in Ndana Island. Figure 12. Map of suitable area for coral reef conservation 47 Figure 13. Map of suitable area for diving 48 49 Figure 14. Map of suitable area for seaweed cultivation

5.1.2. Economic Analysis