Santhosh Kumar, R; Dr. Rajendran, S(Cochin University Of Science And Technology, November , 2006)
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Abstract:
The present study deals with the different hydrogeological
characteristics of the coastal region of central Kerala and a comparative
analysis with corresponding hard rock terrain. The coastal regions lie in
areas where the aquifer systems discharge groundwater ultimately into the
sea. Groundwater development in such regions will require a precise
understanding of the complex mechanism of the saline and fresh water
relationship, so that the withdrawals are so regulated as to avoid situations
leading to upcoming of the saline groundwater bodies as also to prevent
migration of sea water ingress further inland. Coastal tracts of Kerala are
formed by several drainage systems. Thick pile of semi-consolidated and
consolidated sediments from Tertiary to Recent age underlies it. These
sediments comprise phreatic and confined aquifer systems. The
corresponding hard rock terrain is encountered with laterites and
underlined by the Precambrian metamorphic rocks. Supply of water from
hard rock terrain is rather limited. This may be due to the small pore size,
low degree of interconnectivity and low extent of weathering of the country
rocks. The groundwater storage is mostly controlled by the thickness and
hydrological properties of the weathered zone and the aquifer geometry.
The over exploitation of groundwater, beyond the ‘safe yield’ limit, cause
undesirable effects like continuous reduction in groundwater levels,
reduction in river flows, reduction in wetland surface, degradation of
groundwater quality and many other environmental problems like drought,
famine etc.
Description:
Dept. of Marine Geology and Geophysics
School of Marine Sciences
Cochin University of Science and Technology
Terry Mechado; Dr.Seralathan, P(Cochin University Of Science And Technology, April 12, 1995)
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Abstract:
Continental shelf is of particular significance in marine geology ,
because it links the two basically different structural zones in the earth's crust; the
continents and ocean basins. The shelf area has much wider importance in many
fields of activity such as scientific, economic, social, political and strategic. The
pace of development has ultimately put pressure on mankind to look for exploitable
resources and accessibility to the continental shelf area and beyond. Added to the
above, the developmental activities in the coastal area would readily and directly
influence the innershelf sediments. This situation demands a thorough geological
knowledge of the continental shelf area. Moreover, a successful management of
the continental shelf zone requires an optimum data base on the physico-chemical
nature of the shelf sediments. Although sedimentological studies were carried out
along the western continental shelf of India, a well documented systematic study
of the inner shelf off Trivandrum coast is still found to be lacking. Considering the
physiographic settings and the vicinity of two renowned placer deposits at Chavara
and Manavalakurichi, such a sedimetological inventory has become all the more
vital.
In view of the above, a research programme has been drawn up to
account the salient sedimentological and mineralogical aspects of the innershelf
and beach sediments between Paravur and Kovalam, Trivandrum district, Kerala
(latitudes 8° 7'00" to 8° 47'45" and longitudes 76°43'00" to 77° 40'45"). The
findings are presented in six chapters formatted to address the aim of this
research.
Description:
Marine Geology Division
School of Marine Sciences
Cochin University of Science And Technology