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Sangode, Satish J.
- Magnetic Susceptibility Studies of Soils in Delhi
Abstract Views :212 |
PDF Views:189
Authors
Affiliations
1 Department of Earth Sciences, Indian Institute of Technology, Roorkee 247 667, IN
2 Wadia Institute of Himalayan Geology, 33, General Mahadeo Singh Road, Dehra Dun 248 001, IN
1 Department of Earth Sciences, Indian Institute of Technology, Roorkee 247 667, IN
2 Wadia Institute of Himalayan Geology, 33, General Mahadeo Singh Road, Dehra Dun 248 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 6 (2005), Pagination: 667-672Abstract
An atlas of magnetic anomalies in soils has been prepared for the first time for the city of Delhi, capital of India and one of the most populous and urbanized city in the world. The study reveals that magnetic susceptibility for Delhi top soils (0-15cm) coincide with either industrial sources of pollutants or natural anomalies. The result shows low field mass-Specific susceptiblity value ranging for different observed classes as industrial(3 02 531x105 m3/kg), traffic areas (0 48 100 67 x105 m3/kg) and natural sections (0 02-6 8 xx105 m3/kg). Frequency dependent susceptibility shows quite high median value of 8 67% for older pit samples (depth samples), followed by 5 88% in present (top soils) and lowest for industrial samples (1 67%). The present study is a preliminary investigation on the environmental magnetic studies of soils in Delhi. More detailed rock magnetic studies and assessment of associated contaminations of soils are in progress.Keywords
Magnetic Susceptibility, Spatial Analysis, Top Soil, Delhi.- Increasing and decreasing trends in extreme annual streamflow in the Godavari catchment, India
Abstract Views :161 |
PDF Views:82
Authors
Affiliations
1 Department of Geography, Savitribai Phule Pune University, Pune 411 007, IN
2 Department of Geology, Savitribai Phule Pune University, Pune 411 007, IN
1 Department of Geography, Savitribai Phule Pune University, Pune 411 007, IN
2 Department of Geology, Savitribai Phule Pune University, Pune 411 007, IN
Source
Current Science, Vol 122, No 9 (2022), Pagination: 1085-1089Abstract
In this study, we present the changing trends in extreme annual streamflow at 38 gauging stations in the Godavari catchment, India, during the period 1966–2015. We have applied Mann–Kendall trend test to the time series of at least 20 years of continuous data. The results indicate an increasing trend in the peak streamflow in the northern stations located within the Wainganga, Wardha and Indravati sub-catchments. We observed a critical declining trend at the upstream, central and downstream of the Godavari main catchment. Increasing trends in annual peak streamflow may cause severe higher magnitude floods in the Godavari catchment in the near future that may affect the lives of millions of population.Keywords
Flood, gauging stations, peak streamflow, river catchment, trend analysis.References
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