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Purnama, Ig. Setyawan
Fakultas Geografi UGM
Agriculture, Biological Sciences & Forestry

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STRATIGRAFI BATUAN DAN KONDISI AKUIFER DI KAWASAN WISATA CANDI BOROBUDUR DAN PRAMBANAN Purnama, Ig. Setyawan
Jurnal Rekayasa Lingkungan Vol 6, No 1: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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Abstract

Borobudur and Prambanan Temples are icons of cultural tourism in Central Java and Yogyakarta. Increasing settlement, tourist and new facilities, especilly garden, cause the icreasing of groundwater usage. In the long term, the usage of groundwater that exceed the recharge can cause various impact such as land subsidence that can make damage of temples structure. The objectives of this study are to identify the rock stratigraphy in research area and know thecondition of aquifer and its groundwater potency. To achieve these goals, it is carried out geoelectric sounding in 10 samples point, namely five points in Borobudur Temple and five points in Prambanan Temple. To analyse sounding data, the resistivity data from field sounding are interpreted by Schlumberger O’Neil Programme. Base on the interpretation, can be determined rock stratigraphy, aquifer condition and qualitative potency estimation of groundwater in the research area. The results showed that the rock stratigraphy in sourrounding Borobudur and Prambanan Temples are different. The area surrounding Borobudur Temple consist of sand, gravel, tuff, lapilli, claystoneand sandstone, whereas in Prambanan are consist of sand, gravel, soil, rock fracture and sand clayed. Aquifer layer in Borobudur area are consist of sand, gravel , tuff and lapilli, whereas in Prambanan area are consist of sand and gravel. Base on its aquifer material, the groundwater potency in Prambanan area is higher than Borobudur area.Key words : rock stratigraphy, aquifer condition.
EVALUASI POTENSI SUMBERDAYA AIR SUNGAI UNTUK PENGAIRAN DI PROVINSI JAWA BARAT DAN BANTEN Purnama, Ig. Setyawan
Jurnal Rekayasa Lingkungan Vol 5, No 1: Jurnal Rekayasa Lingkungan
Publisher : BPPT

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The objectives of this research are to calculate river water potency and irrigation need in West Java and Banten, and evaluate its water balance. Calculation of river water potency is based on river discharge data in each river basins, whereas calculation of water need for agriculture is based on area width and irrigation need. The result of the research shows that the highest river water potency in West Java is in Cisadane-Ciliwung River Basins about 3119.81 million m3/year. The lowest river water potency is in downstream Citarum River Basin about 383.55 million m3/year. In Banten, the highest river water potency is in Cisadeg-Cikuningan River Basins about 4476.32 million m3/year, whereas thelowest is in Labuhan Merak River Basin about 596.33 million m3/year. According to water balance evaluation, the water balance of two provinces are also variative. In West Java, Upstream Citarum River Basin and Downstream Citarum River Basin almost get water defi cit in along year. In Banten, water defi cit in river basins just happen in several month. Base on water surplus, there are no river basin in West Java that get water surplus along year. In Banten, Ciujung River Basin get water surplus along year.Key words : river water, irrigation, river basin
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