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Rai, S. P.
- Stream Discharge Analysis Under Different Forest Covers: a Case Study from Paired Microwatersheds of Garhwal Himalaya, India
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Indian Forester, Vol 137, No 7 (2011), Pagination: 805-813Abstract
Two microwatersheds namely Arnigad and Bansigad near Mussoorie, equipped with hydrometeorological instruments were selected to monitor the impact of forest cover on stream discharge. Arnigad microwatershed is having dense forest cover and Bansigad is with degraded forest. Total rainfall received in the Arnigad and Bansigad micro watersheds are 2905 mm and 2958 mm, generating runoff of 1627 mm and 1932 mm respectively during the year 2008-09. During the monsoon period from June to September, 2008 both the watersheds r eceived about 86-88% of the total rainfall while runoff per centage during June to September was 81% in Bansigad and 60% in Arnigad watershed. Total annual discharge of the stream under degraded forest cover was higher by 305 mm (19%). Total stream discharge under dense forest during the non monsoon period from October, 2008 to March, 2009 was higher by 50%.Keywords
Forest Hydrology, Watershed, Rainfall, Discharge
- Evaluating forest Influence on Rainfall-runoff Relationship from Paired Micro-watersheds of Lesser Himalayas, India
Abstract Views :154 |
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Authors
Affiliations
1 Climate Change and Forest Influence Division Forest Research Institute, Dehradun, 248006, Uttarakhand, IN
1 Climate Change and Forest Influence Division Forest Research Institute, Dehradun, 248006, Uttarakhand, IN
Source
Indian Forester, Vol 140, No 7 (2014), Pagination: 661-666Abstract
The purpose of this study was to establish rainfall-runoff relationship amongst the hydro-meteorological and vegetation characteristics and other site parameters at micro-watershed level. It brings out the assessment impact of forest on hydrological behavior. Efforts were made through present study, in which two micro-watersheds namely Arnigad (Dense Oak Forest) and Bansigad (Degraded Oak Forest) near Mussoorie, India were monitored continuously for the period of three years. The present study indicated that a dense forest cover regulates stream flow and controls the high peak flows, resulting in delayed discharge peaks which makes stream perennial and sustainable.Keywords
Rainfall-runoff Relationship; Oak Forest; Key Words: Degraded Forest; Hydrological Processes; Micro-watershed- Pattern and Intensity of Erosion in the Environmentally Stressed Khulgad Watershed, Kumaun Himalaya
Abstract Views :203 |
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Authors
J. S. Rawat
1,
S. P. Rai
2
Affiliations
1 Department of Geography, Kumaun University, Almora - 263 601, IN
2 National Institute of Hydrology, Roorkee - 247 667, IN
1 Department of Geography, Kumaun University, Almora - 263 601, IN
2 National Institute of Hydrology, Roorkee - 247 667, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 50, No 3 (1997), Pagination: 331-338Abstract
In the Khulgad watershed in the Kosi Valley in the Kumaun Himalaya, the average rate of erosion is 0.07 mm/year or 186 t/km2/year. Tectonic and anthropogenic activities have together appreciably accelerated the rate of erosion. A study over the period of three years (1991-1993) demonstrated that the rate of erosion is 0.19 mm/year (500 tlkm2/year) in the tectonically disturbed land, 0.12 mm/year (315 t/km2/year) in the barren land, and 0.10 mm/year (278 t/km2/year) in the agricultural land, while in the forest lands it varies between 0.02 mm/year (41 t/km2/year) under an oak forest and 0.04 mm/year (100 t/km2/year) under a pine forest. Compared to the intensity of erosion in the least disturbed oak forest, the erosion rate is about 10 times higher in the tectonically disturbed land, and 5 to 8 times higher in the anthropogenically stressed agricultural and barren lands.Keywords
Environmental Geology, Erosion, Himalaya, Uttar Pradesh.- Bathymetry, Sedimentation Rate and Physico-Chemical Characteristics of Mansar Lake in the Himalayan Foothills, Jammu and Kashmir, India
Abstract Views :180 |
PDF Views:2
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.- Possibility of Hydrological Connectivity between Manasarovar Lake and Gangotri Glacier
Abstract Views :233 |
PDF Views:77
Authors
Affiliations
1 Department of Geology, Banaras Hindu University, Varanasi 221 005, and National Institute of Hydrology, Roorkee 247 667, IN
2 Symbiosis Institute of Geoinformatics, Symbiosis International (Deemed) University, Pune 411 016, National Institute of Hydrology, Roorkee 247 667, IN
3 National Institute of Hydrology, Roorkee 247 667, IN
1 Department of Geology, Banaras Hindu University, Varanasi 221 005, and National Institute of Hydrology, Roorkee 247 667, IN
2 Symbiosis Institute of Geoinformatics, Symbiosis International (Deemed) University, Pune 411 016, National Institute of Hydrology, Roorkee 247 667, IN
3 National Institute of Hydrology, Roorkee 247 667, IN
Source
Current Science, Vol 116, No 7 (2019), Pagination: 1062-1067Abstract
Considering the hydrological and religious significance of the Ganga River and the Manasarovar Lake in India, the present study has been devised to investigate the data related to the place of origin of the Ganges and to investigate the likely connection between waters of the two systems. Satellite data was employed to develop maps and find out the possibility of surface connectivity, whereas isotopic and chemical data, obtained from the field samplings and the published research literatures were used to investigate the possibility of subsurface connectivity of the Gangotri Glacier water with that of the Manasarovar Lake. Topographically, both the water systems are located in different catchment zones, separated by high mountain ridges; rejecting any possibility for the surface connectivity. Similarly, there are significant variations in isotopic and physiochemical properties of the water, suggesting no possibility of surface or sub-surface connectivity between water of the two systems.Keywords
Ganga River, Gangotri Glacier, Mansarovar Lake, Satellite Data, Stable Isotope.Full Text
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