| Summary: | Human needs water for survival. Besides water surface, shallow groundwater can be used as alternative daily needs. Therefore the information of potential shallow groundwater is very important to know the spatial analysis for the large area. This is supported by the technological advances of Remote Sensing and Geographic Information System (GIS) that can take on the role as a solution to this problem in generating a map. The research was held in Bedog sub-watershed. The research objective is to assess the ability of remotely sensed data of ALOS - AVNIR 2 to extract the parameters that used in the determination of shallow groundwater potential zoning in Bedog sub-watershed and to map and analyze the spatial distribution of shallow groundwater potential in Bedog sub-watershed.
The method used is integrate the remote sensing techniques and GIS by making shallow groundwater potential zoning map in Bedog sub-watershed with parametric approach (for the landforms from volcanic processes with sand aquifer material). For shallow groundwater potential in the landforms from solusional processes, the method used is measurement of shallow ground water potential in the field with quantitative descriptive approach. Primary data used is remotely sensed data of ALOS - AVNIR recording in 2 June 2009 supported by some maps and other secondary data. The field survey was carried out by the observation and measurement of terrain parameters to determine the accuracy of tentative map. Measurement of shallow groundwater thickness in dug well also did to determine the accuracy of the final map. It is shallow groundwater potential zoning map in Bedog sub-watershed.
The accuracy of Interpretation from each terrain parameter are for parameter of rocks and landforms resulting 100% off accuracy, 75% of soil texture, 77.78% of slope and 85% of land cover. Shallow groundwater potential maps generated from the landforms from volcanic processes with material aquifer of sands produces shallow groundwater potential in 3 classes (low potential, moderate potential and high potential) through the measurement of sahllow groundwater thickness information in the field. It is able to be generalized to information of groundwater aquifer that contain of it. Shallow groundwater potential in the landforms from solusional processes with a limestone rock as a material shows very varied potential shallow groundwater seen froom difference phenomenon in the field.
|
|---|