Sivadas, T K; Dr.Samuel, C T(Cochin University of Science And Technology, October , 1983)
[+]
[-]
Abstract:
This thesis reports on the details of the works done
to develop a complete system for acquisition of the important
marine environmental parameters namely, current, current
direction, salinity, temperature and depth. It encompaéps
transducers,signalconditioners display arrangements and remote
controlled multiplexer which constitue the system. The various
associate instruentation and environmental requisites
and problems have been discussed and solved to considerable
extend. The design and development features of this composite
system includes an integrated approach in order to make
the final equipment to be simple, inexpensive and easy for
operation from small and large boats. This could be achieved
with the successful development of all required components
with features matching between them, such as sensors,
signals conditioners remote operated multiplexers, comon
display methods, quick performance check and calibration
methods. The major success rests on the development of
sensors with excellent performance characteristics suitable
for marine environment. out of the 5 sensors. that of current
salinity and depth are quite noval types with specific advantages.
The environmental effects have been eliminated to the
required extend. The common signal conditioner for salinity,
temperature and depth has noval design features for achieving
simplicity, reliability and accomodating the three sensors of
different functional requirements.
Description:
School of marine sciences, Central institute of fisheries technology, Cochin University of Science And Technology
Bijumon, K B; Dr.Ouseph, P P(Cochin University Of Science And Technology, July 4, 2005)
[+]
[-]
Abstract:
Assessment water’ quality nowa-days in global scenario implies the need for a
reference point against which monitoring can be measured and weighed. Aquatic
ecosystenis as part of the natural environment are balanced both witliin tlicinselves and
with other environmental compartments and this equilibrium is subject to natural
variations and evolutions as well as variations caused by human intervention. The
present assessnient is to identify. and possibly quantify, anthropogenic influences over
time against a “natural baseline situation. Water pollution problems have only recently
been taken seriously in retrospect. Once damage occurred, it becomes immeasurable,
and control action cannot be initiated
Description:
School of Environmental Studies,Cochin University of Science &
Technology