Assessment of fluvial response to landslide susceptibility and transient response of tectonically active upper Alaknanda River basin of Uttarakhand Himalaya, India

IF 2.9 Q2 GEOGRAPHY, PHYSICAL
Hem Ch Kothyari , Girish Ch Kothyari , R.C. Joshi , Kalpana Gururani , Senjuti Nandy , Atul Kumar Patidar
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Abstract

This paper focuses on the transient response of the upper Alaknanda River basin and landslide vulnerability analysis of tectonically active segments located between the Trans Himadri Fault (THF) and Main Central Thrust (MCT) in the higher central Himalayan domain. We applied the power law functions of the conventional bedrock incision proxies to decode erosionally balanced tectonic processes. The channel concavity and slope of the upper Alaknanda basin have been logarithmically evaluated to understand the balance between erosion/incision and tectonic events. Further, tectonically balanced erosional events along the trunk and tributary stream dynamics have been estimated using the Chi (χ) function law. The results of χ suggest a disequilibrium state of the trunk and tributary stream concerning steady state condition. Furthermore, the landform and longitudinal river profile have been analyzed to understand differential uplift/incision and impact of erosion in river profile between THF and MCT. Furthermore, we applied a geospatial technique for landslide susceptibility analysis. Our results show that approximately 94.45% of the basin area is highly vulnerable and has the potential for future landslides and glacial avalanches. Furthermore, we claim that this study is extremely helpful to identify the locations of future geohazards (landslide, avalanche, cloudburst etc.) and their impact on the downstream areas where population density is very high.

印度北阿坎德邦喜马拉雅地区构造活跃的阿拉克南达河上游流域对滑坡易发性和瞬态响应的河川响应评估
本文重点研究了阿拉克南达河上游流域的瞬态响应,以及位于喜马拉雅山中高山区跨喜马德里断层(THF)和主中央隆起(MCT)之间的构造活跃地段的滑坡脆弱性分析。我们应用传统基岩切入代用指标的幂律函数来解码侵蚀平衡构造过程。我们对上阿拉克南达盆地的河道凹度和坡度进行了对数评估,以了解侵蚀/侵蚀与构造事件之间的平衡。此外,还利用 Chi (χ) 函数定律估算了干流和支流动态的构造平衡侵蚀事件。χ 的结果表明,干流和支流在稳态条件下处于非平衡状态。此外,我们还对地貌和河流纵剖面进行了分析,以了解 THF 和 MCT 之间不同的隆起/内陷以及侵蚀对河流剖面的影响。此外,我们还应用地理空间技术进行了滑坡易发性分析。我们的研究结果表明,盆地约 94.45% 的面积非常脆弱,未来有可能发生滑坡和冰川雪崩。此外,我们认为这项研究对于确定未来地质灾害(滑坡、雪崩、云爆弹等)的位置及其对下游人口密集地区的影响非常有帮助。
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来源期刊
Quaternary Science Advances
Quaternary Science Advances Earth and Planetary Sciences-Earth-Surface Processes
CiteScore
4.00
自引率
13.30%
发文量
16
审稿时长
61 days
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