STUDI GEOLOGI DAN HIDROGEOLOGI DI DAERAH GUNUNG GEDE, KABUPATEN CIANJUR, PROVINSI JAWA BARAT
Mt. Gede has springs distribution which are used by local people. The geothermal utilization plan in this area has raised concerns among local people due to springs contamination caused by drilling waste. The drilling waste disposal would not contaminate groundwater if managed properly accordi...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/77601 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Mt. Gede has springs distribution which are used by local people. The geothermal
utilization plan in this area has raised concerns among local people due to springs
contamination caused by drilling waste. The drilling waste disposal would not
contaminate groundwater if managed properly according to geological and
hydrogeological condition. Therefore, it is necessary to do study which shows the
geological and hydrogeological condition before drilling as a planning and
anticipation, so there will be no springs contamination .
So, this study is proposed to do geological and hydrogeological mapping, also identify
physical and chemical groundwater condition. The method of this study consists of
preliminary study, geological and hydrogeological mapping, physical and chemical
groundwater properties analysis.
Geological mapping which have been done is based on base maps such as lineaments
map, slope analysis map, drainage pattern map, and vulcanostratigraphic map. The
results of geological mapping consists of 21 geomorphological units, 21 lithological
units, five geological structures as faults, three alteration zones, and three eruption
periods as shown in vulcanostratigraphic column. Eruption period began with
emersion of Khuluk Pangrango, Khuluk Gumuruh, Khuluk Gede, Gumuk Sela, and
ended with Gumuk Ratu.
Hydrogeological mapping is based on geological mapping result such as slope
analysis map, geological map, and geological cross-section. The result of
hydrogeological mapping consists of recharge zone which located on peak and slope
of the mountain, discharge zone on slope, four spring types, three aquifer units, and
three probability of subsurface groundwater flow in hydrogeological cross section.
Identification of physical and chemical conditions of groundwater have been done
based on physical and chemical properties of spring samples which resulted some
graphics and diagrams. Based on the results, there is five spring samples which
expected to be influenced by thermal water both physically and chemically. The five
samples have north to north-east groundwater pattern of study area which caused by
mixing process with hydrothermal fluid and dissolution of alteration minerals. |
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