Interpretation of satellite imagery only helps partially since many structures may not have a surface expression as they are likely to be obscured by covering of soil/ vegetation and hence, effective mostly in areas with rock exposures. On the contrary, groundwater is generally needed in comparatively flat areas with soil cover. Ground based geophysical methods have slow coverage and are expensive. Airborne survey data helps in narrowing down the areas for ground-based methods. To resort to the latest technology of airborne geophysical survey for groundwater targeting in the hard rock crystalline terrain of the state, Government of Odisha took up the ?Orissa Groundwater Project? in collaboration with the Government of Western Australia. The project was jointly carried out by the Directorate of Geology, Odisha and World Geoscience Corporation, Perth, Western Australia, which undertook the Survey.The High Resolution Aeromagnetic Survey was conducted over 75,000 sq km area of the hard rock terrain in Odisha covering 109 Survey of India toposheets of 1:50,000 scale. Various types of data and information like Total Magnetic Intensity, 256 Channel Radiometric Data (windowed for Gamma Ray radiations of K, Th & U) and Digital Elevation Model were acquired by flying at a low altitude of 80m for higher resolution. The datasets were processed, imaged and interpreted to prepare Geological and Hydrogeology target maps with support of necessary fieldwork. Interpretation of airborne data ensured incorporation of continuous geological information in these maps irrespective of the surface covers. The purpose of the Hydrogeological Target Map series is to show the known hydrogeological conditions and related data to outline zones which are considered by current knowledge to have good potential to produce groundwater.
Targeting Groundwater in Hard Rocks of Odisha: Aeromagnetic Surveys
₹100.00
Interpretation of satellite imagery only helps partially since many structures may not have a surface expression as they are likely to be obscured by covering of soil/ vegetation and hence, effective mostly in areas with rock exposures. On the contrary, groundwater is generally needed in comparatively flat areas with soil cover. Ground based geophysical methods have slow coverage and are expensive. Airborne survey data helps in narrowing down the areas for ground-based methods. To resort to the latest technology of airborne geophysical survey for groundwater targeting in the hard rock crystalline terrain of the state, Government of Odisha took up the ?Orissa Groundwater Project? in collaboration with the Government of Western Australia. The project was jointly carried out by the Directorate of Geology, Odisha and World Geoscience Corporation, Perth, Western Australia, which undertook the Survey.The High Resolution Aeromagnetic Survey was conducted over 75,000 sq km area of the hard rock terrain in Odisha covering 109 Survey of India toposheets of 1:50,000 scale. Various types of data and information like Total Magnetic Intensity, 256 Channel Radiometric Data (windowed for Gamma Ray radiations of K, Th & U) and Digital Elevation Model were acquired by flying at a low altitude of 80m for higher resolution. The datasets were processed, imaged and interpreted to prepare Geological and Hydrogeology target maps with support of necessary fieldwork. Interpretation of airborne data ensured incorporation of continuous geological information in these maps irrespective of the surface covers. The purpose of the Hydrogeological Target Map series is to show the known hydrogeological conditions and related data to outline zones which are considered by current knowledge to have good potential to produce groundwater.
Publication Mode |
Online |
---|---|
Publication Author |
Shubhransu Mishra |
Publication Language |
English |
Publication Type |
Conference Paper |
Publication Year |
2021 |
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