Regional Conference, Kota Kinabalu Malaysia

Abstract Submission Form

Corresponding Author: Dr. T.A. Bogaard

Address:

Department Physical Geography

Faculty of Geosciences

Utrecht University

P.O.Box 80115

3508TC Utrecht

The Netherlands

Email: t.bogaard@geo.uu.nl
Fax: +31-30 2531145

Title of paper:

Spatial Analysis of Volcanic Hydrogeology at Mt. Ciremai, West Java, Indonesia

Author(s) and Affiliations

Thom Bogaard

Department of Physical Geography,Faculty of Geosciences, Utrecht University, P.O. Box 80115, 3508 TC Utrecht, The Netherlands (e-mail: t.bogaard@geo.uu.nl)

D. Erwin Irawan

Research Group on Applied Geology, Faculty of Earth Sciences and Mineral Technology, Institut Teknologi Bandung,

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

Deny Juanda Puradimaja

Research Group on Applied Geology, Faculty of Earth Sciences and Mineral Technology, Institut Teknologi Bandung,

Jl. Ganesha No. 10, 40132 Bandung, Indonesia (e-mail: erwin@gc.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. The use of water from volcanic slopes is, however, not without risk as volcanoes are very important sources of toxic contaminants. The relatively small discharge volume and large spatial variability of the volcanic deposits make it difficult to assess the characteristics of the local groundwater systems and to calculate the water balance.

This paper describes a methodology to analyse both water quality and quantity using spring discharge information and relate it to volcanic geomorphology.

As case study, more then 100 springs are monitored and analysed on Mt. Ciremai, central Java, Indonesia. 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.

This paper will elaborate on the relationship between volcanic geomorphology and hydrology that was found and discuss how this information could be used for assessing the spatial patterns of local groundwater systems on volcanic slopes.

List up to 4 key words:

1 Water quality

2 volcanoes

3 Groundwater systems

4 spatial patterns

Session Preference:

Preference 1: Environmental Geomorphology

Preference 2: Rapid Changes and Human Respones