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The Application Of Gis And Remote Sensing For Determining Sensitive Area Based On Geological Hazard Perpsectives - Geological hazards is hazard which is usually classified as geological: earthquakes, faulting, tsunamis, volcanoes, avalanches, landslides, and floods. Is is a well known fact that geological hazard disaster strikes countries, causes enormous destruction and creates human suffering and produces negative impacts on national economies. Due to diverse geo-climatic conditions prevalent in different parts of the globe, different types of geological hazard disaster strikes according to vulnerability or the area. Worldwide growth of population and particularly concentration of man and his works into urban areas, has heightened such treats to level where large-scale, and often costly, planning to reduce the hazard has become essential in many countries.By using GIS and Remote sensing technology to determine sensitive area based on geological hazard perspectives, constitute the new point of view in performing the research. Remote sensing can enable geomorphic study of areas that are inaccessible to field-investigation and GIS can perform spatial analysis by an unique way. Such conducting unsupervised to determine settlement area, generating slope from satellite imagery and with GIS all results can be mapped and analyzed by using spatial analysis. To develop knowledge base which will be used as an input for decision support system.
The core and simultaneous benefit of this research is the capabilities of GIS and Remote Sensing technology that can help geoscientist especially geologist to capture, manipulate and analyze information of an object without physical contact as preliminary survey (reconnaissance), mainly for geomorphic study of areas that are inaccessible to field-base investigation. Moreover, by utilizing the available sources of data (data provider) GIS and Remote Sensing can be used more effectively and efficiently compared to the current of traditional methods for interpreting extremely large cover research area.
The sensitive area in research area, occupied by volcanic and sedimentary breccias, conglomerate, sandstone, limestone, claystone, and alluvium, with slope controlled bigger than 15%. In some places, its also occupied by ingenious rock with slope controlled bigger and 50%, particularly the area with dominantly controlled by geologic structure. Determination concerning unstable zone in term of ‘sensitive area’ in research area immensely supported by principal component analysis in determining iron-oxide and clay-hydroxyl (alteration zone) combined with geomorphological interpretation (geology structure & drainage pattern), slope and rock characteristics weighting. There are 215 villages in Banten and West Java province which occupied sensitive area, thus detail field-investigation can be focused concerning those areas.
Efo Hadi (2009) › Published - 30 Nov 2009
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