Past Researches |
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Dissertation 1 Calcutta University Application of Remote Sensing for formulation of Coastal Zone Management Plan in and around Digha, West Bengal, India
Dissertation 2
Spatial Distribution of Permeability in Sedimentary structures formed by a Flume Experiment
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Dissertation 1 This study was an integration of geology and its application in CZMP. Digha coastal zone has had a long history of beach erosion but according to the CZMP Digha is important as a tourist place. This study provided an integrated framework of limited beach erosion, development of fisheries, aquaculture, agriculture and tourism.
Dissertation 2The goal of this study was to explore the relationship between the spatial distribution of permeability and sedimentary structures. Four different types of sedimentary structures (dunes, plane beds, ripples, and a delta) were created at Binghamton University using medium sand in separate runs of a recirculating flume with a constant sediment feed. Box cores were extracted from the sediments. Once dried, permeability was measured on a 2 cm grid over the exposed faces of the cores using a compressed-air permeameter. The spatial distribution of permeability was described for different planes (vertical, parallel to flow; horizontal, parallel to flow; and vertical, perpendicular to flow) by the mean length of zones of high and low permeability and by computing semivariograms. The sedimentary structures all have different patterns of permeability variations. The ranges of semivariograms vary in different directions for a given type of sedimentary structure, showing that permeability within sedimentary structures is anisotropic. For ripples and dunes, the mean length of cross strata sets does not compare well with the range of semivariograms or the wavelength of periodicity in the semivariograms. Therefore, it is clear features of the sedimentary structures formed by medium grained sands do not control the spatial distribution of permeability at centimeter scale.
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