15 recreation, and arable farming. The conditions of the marine coastal necessary for
successful and sustained implementation of the specified marine coastal type, namely marine coastal use requirements, were determined using related literature
information and available data. The land suitability index LSI of the marine coastal mapping unit for each marine coastal type was calculated using the
multiplicative combination of suitability rating index FAO, 1976, and LSI value is expressed on a discrete scale of suitability classification for a specific in table 2-
4.Kilic, et al., 2003 Table 2-4. Land suitability index use as fuzzy logic method
LSI Symbol Suitability
Class
1,00 – 0,90 S1
Most suitable 0,89 – 0,75
S2 Suitable
0,74 – 0,50 S3
Less suitable 0,49
N Not suitable
The class criterion for marine coastal suitability evaluation using fuzzy method is describe in table 2-4 such as S1 class, S2 class, S3 class, and N class. These
ordinal values are used in marine coastal suitability analysis, with scale of 0 to 1, therefore each class has a particular criteria to contribute to the goal.
2.6 Study Area
Sumbawa Island is located in West Nusa Tenggara province, Indonesia. The western part of this island is bordered by the Alas strait. This border separate with
Lombok Island, the eastern part of this island is bordered by Sape strait, this border separate the island of Komodo, the Indian Ocean in the south, and the
Flores Marine coastal to the north, and Bima is the largest city, located in the eastern part of the island.
West Nusa Tenggara province consists of Lombok island and Sumbawa island, with a total area of 20 153.15 km
2
. Geographically, West Nusa Tenggara Province
16 is located between 8 ° 10 - 9 ° 5 south latitude and 115 ° 46 - 119 ° 5 east
longitude.
Figure 2-3. Location of study area Majority of the population around the bay are fishermen, aside from fishing most
of the fishermen also conduct seaweed and pearl oyster cultivation as aside income. Seaweed and pearl oyster cultivations to play an important role in
supporting regional economic development contributing to regional economic growth due to rising incomes of local communities.
The research location data is presented in figure 3-6, where at certain particular points observations were made. This purpose of this activity is to collect visual
data and determine the positions using GPS. Therefore, physical marine coastal data is required to do the analysis of marine coastal suitability for seaweed. In one
point of research, there are six physical marine coastal that will be calculated such as depth, pH, brightness, salinity, dissolve oxygen, and temperature Wiradisastra,
2004. Some points of research are incomplete data, therefore it will not be included in this report, for example when value is zero for the depth of physical
marine coastal; the value is invalid and will not be included in the report, because depth physical marine coastal is an important part in seaweed cultivation.
17
2.7 Seaweed Cultivation
Development of seaweed cultivation is one of the alternatives of marine commodities cultivation. This activity becomes a foundation for the cultivation of
marine food resources in the future. Based on marine coastal suitability utilization of coastal marine are as it is potential to increase the income. The location for
seaweed cultivation needs specific environmental conditions. Indonesia as an archipelagic state has a huge potential for the development of
seaweed cultivation, especially in coastal marine areas and the gulf. This condition is possible become the seaweed habitat is suited to the waters condition
because relatively low rainfall, and lack of fresh water from the estuary. Seaweed is one of the commodities with high demand and is used in various fields such as
medicine, agriculture, pharmaceutical, and industry, and could also be processed into semi-finished materials. Seaweed cultivation is highly profitable increase the
income of fishermen. The efforts of seaweed cultivation need to be assessed and explored as potential marine coastal suitability Syahdan, 2008.
2.8 Pearl Oyster Cultivation
