26th Annual Indonesian Geologist Association

Join Convention Bali, 2007

Abstract Submission

Outlining Hydrogeological System using Multivariate Analysis on Groundwater Quality at Mt. Ciremai, West Java, Indonesia

Author(s) and Affiliations

1. D. Erwin Irawan

2. Deny Juanda Puradimaja

Research Group on Applied Geology, Faculty of Earth Sciences and Technology,

Institut Teknologi Bandung,

Jl. Ganesha No. 10, 40132 Bandung, Indonesia (e-mail: erwin@gc.itb.id)

3. Sudarto Notosiswoyo

Research Group on Earth Resources Exploration, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung,

Jl. Ganesha No. 10, 40132 Bandung, Indonesia (e-mail: sudarto@mining.itb.ac.id)

Abstract (no more than 200 words)

Volcanic slopes are important sources of water. Due to altitude effects they receive significant amounts of precipitation whereas the lower regions often receive far less (<500 mm/year). In densely populated tropical regions, like Java, Indonesia, this water source is of increasing importance both for irrigation and domestic uses.

As case study, more than 100 groundwater springs are monitored and analysed on Mt. Ciremai, central Java, Indonesia. More than 15 variables have been measured. The results show radial flow patterns, a dependency on slope aspect and altitude and lithology. The aquifer system was found to be a combination of porous (several meters) and fractured rock that is built up of lava and volcanic breccias.

The analysis are involving multivariate analysis of principal component analysis and cluster analysis to trace the dominant group of variables which control spring emergence. This paper will elaborate on the relationship between physical and chemical properties of groundwater as hydrogeological tracer with local groundwater systems on volcanic slopes.

Key words:

1 Strato volcanoes

2 Hydrogeological Tracer

3 Multivariate analysis