Environmental Engineering Reference
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Limnological Variations of Two
Deccan Wetlands
S. V. A. Chandrasekhar
Abstract
A comparative study on physic-chemical and biological features with spe-
cial reference to Rotifera and Cladocera of two Deccan wetlands
viz.,
Pocharam lake and Wyra lake, that are situated in Andhra Pradesh have
been carried out during 2003-2004 and 2006-2007, on a seasonal basis.
The physic-chemical factors revealed that the parameters like pH, turbidity,
DO, carbonates and silicates are at higher side in Pocharam lake waters
than the other and the factors like electric conductivity, bicarbonates, chlo-
ride, phosphates, sulphur, sodium and potassium of Wyra lake waters are at
higher side. But total hardness and calcium values are more or less equal in
both the lakes. The biotic factors revealed the presence of 24 species
belonging to 9 genera of Rotifera and 11 species in 5 genera in Pocharam
lake while in Wyra lake it was 20 species under 10 genera of Rotifers and
16 species belonging to 9 genera of cladocerans.
Keywords
Limnology Rotifera Cladocera Pocharam lake Wyra lake
Introduction
construction of dams across small rivulets and
streams for irrigation or as a source of drinking
water of the region. Pocharam Lake that is situ-
ated in Medak-Nizamabad Districts and Wyra
Lake in Khammam District of Andhra Pradesh in
South India are presently the major sources of
water in the regions. Pocharam Lake is situated at
about 110 km from Hyderabad city in its north-
west direction/17 km from Medak town, and
Wyra Lake is about 250 km from Hyderabad city
in its northern side/25 km from Khammam town.
Some of the notable contributions on limnol-
ogy in the state include Zafar (
1966
),
Large, medium and small water bodies called
lakes/reservoirs/impoundments constitute the
major freshwater resources of Andhra Pradesh,
and these water bodies were formed by the
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