ISSN: (Online) 2321 -4155
ISSN: (Print) 2320 -7000

JOURNAL OF INDIAN RESEARCH
VOLUME : 2, ISSUE : 1, January-March, 2014 (ISSN No. : 2321-4155)
 
HABITATS OF Lutrogale perspicillata IN THE NARAYANI RIVER, CHITWAN NATIONAL PARK, NEPAL: ASSESSMENT OF WATER QUALITY
Paras Mani Acharya & Sunil Lal Rajbhandari
 
ABSTRACT
Analysis of water quality in the otter habitats of the Narayani River was conducted during the month of June, 2012 in order to assess the health of aquatic ecosystem. The analysis of water from 12 sampling stations including an industrial site in Sikrauli estimated the values of parameters in mg/L such as chloride, ammonia, nitrate, orthophosphate, dissolved oxygen (DO), biochemical oxygen demand (BOD), and chemical oxygen demand (COD) at 5.3 ± 3.4; 0.13 ± 0.07; 1.23 ± 0.12; 0.06 ± 0.04; 7.3 ± 0.5; 7.5 ± 4.6; and 21.7 ± 10.4 respectively.

Similarly, water sample from industrial area in Sikrauli was also analyzed for heavy metal concentration. The presence of heavy metals such as mercury, lead, arsenic and cadmium was not detected. But, chromium, iron and manganese showed the concentration of 0.02, 10.5 and 0.2 mg/l, respectively. All the water quality parameters assessed were below the threshold level prescribed by the Nepal Government and therefore, we concluded the water in the study area in healthy condition. This study stresses the need of periodic water quality assessment and monitoring of otter habitats to ensure the healthy wetlands for the conservation of aquatic species in the river basins of Nepal.

 
KEYWORD
Ammonia, nitrate, dissolved oxygen, heavy metals, Narayani River, otter habitats, water quality.
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