ABSTRACT
Maratua Island is one of the islands of Berau District, East Kalimantan
which has great potential of natural beauty for tourism development. The area is a
carbonate reef built-up island or so-called karst island. This paper is an endeavor 1) to
unveil geomorphological and hydrogeological characteristics of the island, and 2) to
recommend Island development as a tourist destination. Maratua Island is a V shape
atoll with the open lagoon. The methods employed in the research were interpretation
of ALOS and LANDSAT TM image incorporated with image taken from drone, and
field survey. ALOS image and Alos-Generated DEM were used to identify and to map
the geomorphological features and landform. Field survey included cave exploration
and mapping, as well as geomorphological and hydrogeological observation. Six
geomorphological units were found on the island, i.e., fringing reef, beach, marine
terrace, karst ridge, structural valley, and lagoon. Caves are also found in the karst
ridge and the coast as an inundated passage. Three structural depressions in the karst
ridge are other unique geomorphological feature in the area of which a marine lake
environment with jellyfish is inhabited. The island is typified by two different aquifer
units, i.e., porous media and fractured media aquifer. Porous aquifer lies on the beach
of Bohe Bukut area. Fractured-aquifer characterizes the other geomorphological units
in the area. Freshwater accordingly is found in the beach area with a limited amount.
Unfortunately, the groundwater in the marine terrace and karst ridge are saline.
Maratua Island has enormous potential for tourism destination development. The
major tourist activities in the area based on the geomorphological unit are snorkeling
and diving (in fringing reef and lagoon), hiking, cave exploration and marine lake
exploration and cave diving (in karst ridge and structural valley); recreation and picnic
(beach). The major limitation in the area is a shortage of freshwater resource and
limited land area. Limited water supply should be extracted from the beach area of
Bohe Bukut village. Groundwater extraction from the beach area of Bohe Bukut must
be for drinking water only. Supply of drinking water should be substituted from
collected rainwater or desalination from sea water and water in the cave. Restrictions
in the number of visitors and lodging development should also be considered.
Publikasi:
ICERM 2017
IOP Conf. Series: Earth and Environmental Science 148 (2018) 012014 doi :10.1088/1755-1315/148/1/012014
Penulis:
Eko Haryono(1), M.Haviz Damar Sasongko(1), Didit Hadi Barianto(2), Juswono Budi Setiawan(3), Arif Abdurrahman Hakim (1), Awalludin Zaenuri(1)
(1) Karst Research Group, Faculty of Geography, UniversitasGadjahMada
(2) Geological Engineering Department, UniversitasGadjahMada
(3) Research Centre for Marine Science and Technology, UniversitasGadjahMada
E-mail: e.haryono@ugm.ac.id
File lengkap: