标题:Delineation of Groundwater Potential Zones using Satellite Remote Sensing and Geographic Information System Techniques: A Case study from Ganjam district, Orissa, India
摘要:Water plays a vital role in the development of activities in an area. The surface water resources are inadequate to fulfill the water demand. Productivity through groundwater is quite high as compared to surface water, but groundwater resources have not yet been properly exploited. Keeping this view, the present study attempts to select and delineate various groundwater potential zones for the assessment of groundwater availability in the coastal part of Ganjam district, Orissa using remote sensing and GIS technique. Satellite IRS-IC LISS III, Landsat TM digital and SRTM data have been used in the present study to prepare various thematic maps, viz., geomorphological, geological, slope, drainage density, lineament density map. On the basis of relative contribution of each of these maps towards groundwater potential, the weight of each thematic map has been selected. Further, within each thematic map ranking has been made for each of the features. All the thematic maps have been registered with one another through ground control points and integrated step by step using the normalized aggregation method in GIS for computing groundwater potential index. On the basis of this final weight and ranking, the ground water potential zones have been delineated. Thus from the present study it is observed that an integrated approach involving remote sensing and GIS technique can be successfully used in identifying potential groundwater zones in the study area. Five categories of groundwater potential zones, viz., excellent, very good, good, moderate and poor have been demarcated. Major portions of the study area has good as well as Moderate prospect while a few scattered areas have poor prospect. The excellent potential areas are mainly concentrated along the shore line.
关键词:Groundwater;satellite remote sensing;geographic information system