NDLI: Water quality of Kaptai reservoir in Chittagong Hill Tracts of Bangladesh

Content Provider	Springer Nature Link
Author	Karmakar, Shyamal Sirajul Haque, S. M. Mozaffar Hossain, M. Shafiq, M.
Copyright Year	2011
Abstract	A study was conducted in Kaptai reservoir, one of the largest man-made freshwater lakes of South-east Asia, to determine present status of water quality and its suitability for fishing and other uses. Water samplings were from middle part of the reservoir at 0.2 and 0.8 fractional depths at five different locations from upstream to downstream viz. Burburichara, Maichchari, Subolong, Basanthakum, and Rangamati. Water analyses show that concentrations of NO$_{3}$-N, K$^{+}$ and total P, and suspended solid at all the sampling stations were beyond the recommended values for fish culture. Concentrations of Na$^{+}$, Ca$^{2+}$, Mg$^{2+}$, SO$_{4}$ $^{2−}$, Cl$^{−}$, total dissolved solid (TDS), dissolved oxygen (DO) and chemical oxygen demand (COD) were within the standards for aquaculture. Concentrations of NO$_{3}$-N, SO$_{4}$ $^{2−}$, K$^{+}$ and total P showed no definite trend with depths, locations as well as rainy and dry seasons. Water pH, conductivity, Na$^{+}$ and HCO$_{3}$ $^{−}$ contents were lower in rainy season, and DO and COD higher at almost all the locations in both the depths, compared with dry season. Total solids and concentrations of TDS, DO, COD, Ca$^{2+}$, Mg$^{2+}$ and Na$^{+}$ were higher in upstream and decreased gradually towards downstream in the reservoir. Concentrations of DO and Ca$^{2+}$ and pH were higher and Mg$^{2+}$ less at 0.2-fractional depth than those at 0.8-fractional depth at almost all the locations. The reservoir is in mesotrophic condition containing high concentration of NO$_{3}$-N and total P, in alarming status with the presence of excessive suspended solids from urban pollution around the town. It is necessary to adopt measures for protecting water quality in the reservoir due to such deteriorations.
Starting Page	87
Ending Page	92
Page Count	6
File Format	PDF
ISSN	1007662X
Journal	Journal of Forestry Research
Volume Number	22
Issue Number	1
e-ISSN	19930607
Language	English
Publisher	Northeast Forestry University
Publisher Date	2011-01-28
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Karnaphuli river lake water quality Chittagong Hill Tract inland aquaculture Forestry
Content Type	Text
Resource Type	Article
Subject	Forestry

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