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Kumar, Bhishm
- Bathymetry, Sedimentation Rate and Physico-Chemical Characteristics of Mansar Lake in the Himalayan Foothills, Jammu and Kashmir, India
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Authors
Affiliations
1 National Institute of Hydrology, Western Himalayan Regional Centre, Satwari Jammu Cantt (J&K) 180 003, IN
2 National Institute of Hydrology, Jalvigyan Bhawan, Roorkee (U A ) - 247 667, IN
1 National Institute of Hydrology, Western Himalayan Regional Centre, Satwari Jammu Cantt (J&K) 180 003, IN
2 National Institute of Hydrology, Jalvigyan Bhawan, Roorkee (U A ) - 247 667, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 67, No 2 (2006), Pagination: 211-220Abstract
An attempt has been made to workout the bathymetry, determine the rate of sedimentation and the physico-Chemical characteristics of the Mansar lake of Jammu region. The bathymetric survey conducted using Range-Line method shows present lake surface area is 0 59x106 m2 and volume to be 11 57x106 m3. The rate of sedimentation determined using 137Cs and 210Pb radiometric dating technique in the lake varies between 0 14 cm/y to 0 37 cm/y with a mean rate of 0 23 cm/y±0 002 cm/y. The variation of temperature, pH, electrical conductivity, dissolved oxygen, hardness and alkalinity suggest that Mansar lake undergoes two distinct stages, viz complete mixing stage in the months of January and February and stratified stage in other months. The catchment lithology contributes a large part of the major constituents in lake water, Ca and Mg account 70 to 85% of the cations and HCO3 accounts for 77 to 91% of the total anion, and equivalent ratio of Ca Mg varies from 0 45 to 6 40. The average (Ca+Mg)/HCO3 equivalent ratio of 1 04, major contribution of (Ca+Mg) to total cations and high (Ca+Mg)/(Na+K) ratio indicate that weathering of calcareous sandstones and mudstones of the Siwalik Group could be the primary source of major ions in the lake water. Results of phosphorous show that Mansar lake has entered the eutrophic stage.Keywords
Bathymetry, Sedimentation Rate, 137Cs and 210Pb Dating, Stratification, Hydrochemistry, Mansar Lake, Jammu and Kashmir.- Hydrochemical Characteristics of Groundwater in the Nainital Lake Basin: Implication on the Landslide Hazards
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Authors
Affiliations
1 National Institute of Hydrology, Roorkee - 247 667, IN
2 Institute Instrumentation Centre, Indian Institute of Technology, Roorkee - 247 667, IN
3 Department of Earth Sciences, Pondicherry University, Pondicherry - 605 014, IN
1 National Institute of Hydrology, Roorkee - 247 667, IN
2 Institute Instrumentation Centre, Indian Institute of Technology, Roorkee - 247 667, IN
3 Department of Earth Sciences, Pondicherry University, Pondicherry - 605 014, IN