Studies on the physico-chemical parameters in water of Keibul Lamjao National Park, Manipur, India

A study on the physico- chemical parameters of Keibul Lamjao National Park (KLNP) on seasonal basis was carried out for parameters like temperature, pH, transparency, turbidity, dissolved oxygen, chloride, hardness, calcium and magnesium at six selected Stations. The temperature ranged from 10.4 to 28 degrees C showing subtropical nature. pH was consistent both spatially and temporally except at one Station where it was alkaline having value ranging from 6.9 to 7.26. There was a trend in dissolved oxygen to be more during cold season. Electrical conductivity ranged between 105.56 to 201 microS cm(-1). It was high during the dry season and low during rainy season. Transparency and turbidity values indicated that in most Stations water was clear and the two parameters were found to be negatively correlated (r = -0.381). Based on the hardness (41 to 78 mg l(-1)), water was soft. Significant negative correlation (r = -0.532) was found between rainfall and hardness. Calcium and magnesium ions were found to be below the prescribed value of WHO. These two parameters were found to be positively correlated with hardness. ANOVA showed a significant variation in the parameters recorded during winter and monsoon season.