Development of gis-based decision support system for small island (a case study in ndana island, nusa tenggara timur)

Abstract

Ndana Island in East Nusa Tenggara province is selected as the study area, because the island was classified as small island, located in the Australian border, and need a special management for achieving sustainable natural resources especially at marine area. The development of GIS-based DSS will be has some advantages for Ndana Island such as increasing and protecting the carrying capacity of border territory; using natural resources potencies with sustainable management; increasing income of local people; and developing an isolated island. The objectives of this research are to identify and analyze potencies of Ndana Island, to develop prototype of GIS-based Decision Support System as a tool for analysis of decision making and to propose potential solutions based on sustainable management of Ndana Island. There are four main activities to comply this research are data collection and preparation, database design and implementation, data analysis, and graphical user interface. The suitable area for coral reef conservation area in Ndana Island will be analyzed based on ecology, economic and social factors using GIS analysis. Results from this analysis are three zones in conservation area: core zone, buffer zone and use zone which core zone should be a closed area for development, accessible only for research activity. Buffer zone and use zone areas can be analyzed further for diving suitability. Result of this research is the suitable area for coral reef conservation in Ndana island are S1 (highly suitable) for core zone, S2 (moderately suitable) for buffer zone, S3 (marginally suitable) for use zone and N (not suitable) for non-conservation area. Percentage of S1 is 0.29%, S2 is 3.01%, S3 is 75.58% and N is 21.12%. In buffer and use zone of conservation area, there are 31.33 hectares is moderately suitable (S2) and 146.27 hectares is marginally suitable (S3) for diving suitability. Based on spatial suitability and economic valuation, scenario IV is the best management to apply in coral reef area of Ndana Island, which has the biggest value of NPV, Rp. 86,767,185,416. In scenario IV there are zonation area for tourism, fisheries and protected area with ecology, economic and social consideration. Hopefully this scenario can increase income of local people with sustainable management of natural resources. With this method can help improve coral reef conservation and management, but the level of detailed analysis required depend on the use of data and the value estimation. This research has been developed graphical user interface using Microsoft Visual Basic and MapObject that makes the system easy to understand, handle and use by the user means it can be helpful for the user.