PROCEEDINGS JOINT CONVENTION BALI 2007
The 32^nd HAGI, The 36^th IAGI, and The 29^th IATMI Annual Conference and Exhibition

GEOPOTENCY PROSPECT OF BLAMBANGAN PENINSULA
AS SUPPORTER FOR CONSERVATION DEVELOPMENT
IN ALAS PURWO NATIONAL PARK, EAST JAVA

12 3

Riki Suputra , Hatma Suryatmojo , Srijono

1

Junior geologist, alumni of Geological Engineering, UGM 55281, riki_suputra@yahoo.com

2

Jurusan Konservasi Sumberdaya Hutan, FKHT, UGM

3 Dynamic Geology Laboratory, Geological Engineering, UGM 55281

ABSTRAK

Blambangan Peninsula, East Java, known as Karst Blambangan, come within in Alas Purwo National Park which conservated. Karst area is very potential on natural resources, but it is also a susceptible ecosystem. Besides Geopotency as a resources and also a kind of possible disaster (hazard) which exist in peninsula, it expected to support the development of national park conservation.

The Research apply the field observation methods, going through the trajectory encircle the coastal area, and exploration finding the cave and wellspring. the laboratory Analyze include the petrography, equiped by the chemical analysis for the limestone and water.

Geopotency of Blambangan Peninsula consist of resource: karst topography, industrial dig substance, karst hydrology, coastal area -coastal with the sea wave. Forming of karst topography consist of the micro karst, minor, major, eksokarst, and endokarst. Typical of endokarst is 23 minimum founded cave, include vertical cave with 100 m minimum alley. Those area identify the deposit limestone, andesite, and sirtu. Forming of karst spring controlled by fault, with 12 minimum founded location, 3 potency debit location > 1 litre / second, and for the drinking water, 6 location of it contain the concentration of Chromium and Arsen exceed the permanent boundary sill quality. The appearance of River sub-surface below Istana Cave, become a surface river, and water consumed by society in Fount. The sea wave in Plengkung Coast exploited for surf, and as coastal tourism object – coastal area. Kind of possible disaster in peninsula is the collapse of roof cave, environmental contamination, and tsunami.

National Park of Alas Purwo is the primary forest, conservated, with 19 minimum bamboo species specification, sawo kecik which had old age for hundred years, nyamplung tree; animal asylum: Java bull, deer, and peacock. To optimalyze the conservation efforts, the support of geopotency is needed as a place for the growth of plants and animal. Not only for that but it can also develop the potency of tourism in in the Alas Purwo National Park.

Keyword : Blambangan peninsula, Geology, Geopotency, potency ,karst hydrology, National Park of Alas purwo, karst Blambangan