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Active tectonics along the mountain front around the easternmost part of the Himalayan Range: Implications for geomorphic evolution

The frontal part of the easternmost zone of the Himalayas is tectonically active, which can be ascertained from different quaternary deformation features like tilted terraces, differential upliftment of terraces, and steep scarps. Along the mountain front, four and three levels of terraces are present on the right and left bank of the Siang River respectively with a maximum elevation of 303 m. Different levels of Quaternary terraces indicate episodic upliftment of the area. On the left bank of the Siang River, 300 m upstream from Dhobighat, the terrace deposits are present at an elevation of...

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Flash drought typologies and societal impacts: a worldwide review of occurrence, nomenclature, and experiences of local populations

Abstract Flash droughts, characterised by rapid onset and intensification, are increasingly occurring as a consequence of climate change and rising temperatures. However, existing hydrometeorological definitions fail to encompass the full range of flash droughts, many of which have distinct local physical attributes. Consequently, these events often go undetected or unforecast in generic global flash drought assessments and are underrepresented in research. To address this gap, we conducted a comprehensive survey to gather information on local nomenclature, characteristics, and impacts of...

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Medicinal ethnobotany of the Yakkha community in eastern Nepal

Abstract Background: In rural Nepal, a significant population relies on traditional medicinal treatments for their healthcare needs. However, little is known about the ethnobotanical practices of the Yakkha people, a distinct Tibeto-Burman ethnic group following the Kirati religion in Sankhuwasabha district in eastern Nepal. This study examines the use of medicinal plants by the Yakkha community in three remote villages and assesses the ethnobotanical significance of their traditional knowledge. Methods: The research was conducted in three Yakkha communities with varying levels...

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Application of hydrological model to simulate streamflow contribution on water balance in Himalaya river basin, Nepal

ABSTRACT Hydrological models are widely used and often regarded as reliable tools for accurately estimating various components of the water balance. In a remote Himalayan catchment, such as Tamakoshi basin, where limited hydrometric dataset is available, such models often provide essential insights that are crucial to water researchers and planners. In this regard, we employed the semi-distributed HBV-light (version 4.0.0.25) hydrological model for glacierized Tamakoshi river basin and attempted to quantify various water balance components. For our model tests, using the daily streamflow...

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Groundwater quality evaluation for drinking purpose using water quality index in Kathmandu Valley, Nepal

ABSTRACT Groundwater is a significant source of drinking water in Kathmandu Valley of Nepal. The study aims to evaluate the groundwater quality in terms of water quality index. We compared the physicochemical and microbial parameters of 159 groundwater samples. The study showed that conductivity, hardness, chloride, and nitrate were found to be significantly higher in well water and ammonia was found to have significantly higher concentrations in boring water. The Spearman’s rank correlation coefficient demonstrated a positive correlation between conductivity and hardness, turbidity and...

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Recent warming and its risk assessment on ecological and societal implications in Nepal

Abstract A predominantly mountainous country Nepal has a complex climatic pattern that varies from tropical in the south (Terai region) to arctic in the north (Himalayas). The gradual rise in temperature in the mountainous region has attracted great interest among the scientific community in general over recent years. However, recent warming in Nepal’s east-west and south-north temperature gradients and its implications for ecology and society based on facts and figures are still lacking. In this context, temperature data (1970–2016) of 76 meteorological stations from the Terai region...

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Peat records of atmospheric environmental changes in China: A brief review and recommendations for future research perspectives

Abstract Ombrotrophic peat bogs are widely characterized by precipitation-dependent wetlands where nutrient supply is derived from atmospheric deposition (including snowfall and air dust). These bogs serve as active information storage systems, continuously recording atmospheric environmental changes. In China, peat record show dating back to the commencement of industrialization era and show an increase in environmental pollutants, with an unprecedented increase over the last 50 years. In NE China, long-distance high-altitude winds carry dust from Mongolia and Western China, whereas in...

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Editorial: Advances in exploration and exploitation of deep and ultra-deep shale oil and gas

Editorial on the Research TopicAdvances in exploration and exploitation of deep and ultra-deep shale oil and gas The Central Himalaya (Nepal) occupies about 800 km in the entire 2,400 km long Himalayan range, which is divided into four tectonostratigraphic zones from south to north: the Sub-Himalaya (Siwalik), Lesser Himalaya (LH), Higher Himalaya (HH), and Tibetan-Tethys Himalaya (TH). Gansser and (Neupane et al., 2020) have described the entire Himalayan region including verities of geological structures (e.g., anticline, syncline, fault, etc.) that may be one of the reasons...

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