cifri annual report 2007- 2008 - Central Institute of Brackishwater ...

CIFRI ANNUAL REPORT 200 7- 2008
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Sedirrr err t arid Wut~r Qualitjy c!f'tlra river
Water pH of river Drtrnodar was fbund in the alkaline
range 7.31 - 8.9 (average 8.1). Conductonce in the
nornial range of 169 307 pS cn~" (average 234 pS ctn'
I
). 7'hc Ranigan-j to I>urgapur arca exhibited highest
valucs of' thc conductance duc to tlic impact of
industrial effluents. Dissolved oxygen contcnt was
good. Plankton and submerged wccds incrcascd DO to
I
vcry high lcvcls up to 13.3 mgl at Si~tnalpur. Like
conductancc. HOD of'rhc Ranignr~j to Di~rgapur strctcll
was Sound to exceed the lirnit value of 4 pprn (detcctcd
up to 7.4 rngl I). Alkalinity and hardness values wcrc in
the normal ratlgc. Moderate content of phosphr~te was
noticed in the river sfretch, but tnany a titnc dctecteci in
traccs (observed range 0 - 0.24 mgl.'). In sornc ci~scs
presence of frcc ammoni;~ was also noticed, though
not at a higher level (obscrvccl rangc 0 - - 0.01 111g1 I).
7'hc conccntr;~tion ol'C'd. C'LI. I'b "i! Zn ill water \v;~s in
traccs. Exccpt Zn tllc lcvcls of' C'u, C'd arid 1'1)
in tlic
scdilncnt at 2111 the stations wcrc in traccs. 'l'hc mcan
valucs of'Zn ranged bctwccn 7.2 ;tntl3S.4 rig kg ' soil.
Ass~ssmertt of' ~wtrr / sctlirtrcrlt rrrit.rohicrl c#rrr;r7rtrc
actirpi[y irr river Ilarriodcr
Watcr and scdimcnt A1,P a11d 11-Glu activity: 'T'lic
rcsults indicated vcry high ALP' rf.tivity at Jamalpur.
Hoth thc cnzynlc activities werc lowcst at Uurdwnn,
possibly due to extct~sive sand rrlirling at the ;ma.
Thcrc wcre wide variations in activities in diflkrcrit
satnplings and arc possibly the sc;isot~nl variations.