lesser himalayas
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2022 ◽  
pp. 74-91
Author(s):  
Shachi Pandey ◽  
Parmanand Kumar ◽  
Vijender Pal Panwar ◽  
Raman Nautiyal

Watersheds in the Lesser Himalayan region are highly susceptible to natural hazards, particularly those instigated by action and movement of water, such as soil erosion, flood, and mass movements of lands. Hilly watersheds with diversified land use and fragile ecosystems are responsible for accelerating soil erosion. Soil erosion is one of the most implicit hazards as it degrades water and soil quality in a watershed. The study prioritizes the soil erosion-susceptible zones in the Tons river watershed (India) in the Lesser Himalayan region. The interrelationships and role of morphometry, soil quality, slope, and land use together as four components in soil erosion are studied. Remote sensing data and multi-criteria decision method (MCDM) framework has been used to estimate soil erosion susceptibility of sub-watersheds. Results showed that morphometric parameters like elongation ratio and slope of sub-watersheds play a major role in determining the state of erosion.


2021 ◽  
Vol 50 (12) ◽  
pp. 3505-3522
Author(s):  
Qamar UZ Zaman Dar ◽  
Pu Renhai ◽  
Zulqarnain Sajid ◽  
Mubashir Mehmood ◽  
Abdul Wahab Abdul Wahab ◽  
...  

The petrographic and geochemical analysis of the greywacke horizon of the late Neoproterozoic Hazara Formation from the Hazara Mountains has been investigated to determine the provenance, tectonic settings and weathering history of the sediments. The Late Neoproterozoic Hazara Formation is a thick sedimentary sequence comprising of greywacke, shale, argillites, siltstone, and limestone. The greywackes are characterized by fine to medium-grained, moderately sorted and sub-angular to sub-rounded framework grains. They are rich in quartz, lithic fragments and clay minerals. The petrographic investigation of the greywackes categorized them as feldspathic greywacke in the QFR diagram. The quartz content is higher in sandstone and may reach to 70%, which indicates a weathered felsic source. Chemical Index of Alteration values of greywacke suggests that the source region has experienced highly weathering conditions with a warm and moist climate. Various geochemical interpretations, elemental ratios like Th/Sc, La/Sc,Th/Cr, and positive Eu anomalies indicate that the greywackes of the Hazara formation derived from a felsic source and were deposited within an active continental margin tectonic settings. The main source area of the sediments of the greywackes was located to south to southeast, which may possibly be the Aravali orogeny, central Indian craton and Bundelkhand craton. Finally, the geochemical data of the major elements point to a felsic igneous provenance for the greywacke.


Geodiversitas ◽  
2021 ◽  
Vol 43 (18) ◽  
Author(s):  
Abdus Saboor ◽  
Jalil Ahmad ◽  
Suleman Khan ◽  
Khalid Latif ◽  
Abuzar Khan ◽  
...  

2021 ◽  
Author(s):  
Peng Zhou ◽  
Daniel Fritz Stockli ◽  
Thomas Ireland ◽  
Richard W. Murray ◽  
Peter Clift

2021 ◽  
Author(s):  
Peter Clift ◽  
Peng Zhou ◽  
Daniel Fritz Stockli ◽  
Thomas Ireland ◽  
Richard W. Murray

2021 ◽  
Author(s):  
Peter Clift ◽  
Peng Zhou ◽  
Daniel Fritz Stockli ◽  
Thomas Ireland ◽  
Richard W. Murray

2021 ◽  
Author(s):  
Fayaz Khan ◽  
Salman khattak ◽  
zafar wazir ◽  
Zaheen Ullah ◽  
Ikhtisham Mehmood ◽  
...  

Abstract The current study was carried out near and surrounding fault line areas of Balakot-Bagh (B-B). The study aimed to find radon concentration levels in drinking water sources near and away from the fault line. The comparison was carried out for the radon level in those samples taken from the area near with those taken away from the fault line. Also, to evaluate health hazard from these drinking water to the people of the area. This area had received an earthquake of magnitude 7.6 in 2005. An active technique, RAD-7, based on alpha spectroscopy was used. The study period for the current study was three months, from 16th May to 15th August 2020. Radon concentrations were found higher in bore water with the mean value of 20.6 BqL− 1. These were 19.5 BqL− 1 and 9.3 BqL− 1 in spring and surface water, respectively. The mean value in all type of sources in the study area was 16.5 BqL− 1 which is higher than the maximum contaminated level of 11.1 BqL− 1 recommended by the U.S. The calculated doses from the radon levels were 0.0532 mSv, 0.0562 mSv and 0.0254 mSv and 0.0449 mSv, respectively.


2021 ◽  
Vol 80 (13) ◽  
Author(s):  
Sarfaraz Khan ◽  
Umair Bin Nisar ◽  
Siddique Akhtar Ehsan ◽  
Asam Farid ◽  
Syed Muzayan Shahzad ◽  
...  

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