Sequential Damming Induced Winter Season Flash Flood in Uttarakhand Province of India

IF 0.9 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
P. Rautela, S. Khanduri̇, Surabhi Kundalia, G. Joshi, Rahul Jugran
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引用次数: 4

Abstract

204 persons were killed while two hydropower projects located in close proximity at Rishiganga (13.2 MW), and Tapoban (520 MW) were damaged in Dhauliganga flood of February 7, 2021 in the Indian Himalaya. This incidence occurred during the winter season when the discharge of the glacier fed rivers is minimal, and no rain was experienced in the region around the time of the flood. Despite discharge of the main river, Rishiganga, not involved in the flood due to damming upstream of its confluence with Raunthi Gadhera, based on field evidences massive volume of around 6 million cu m water involved in this flood is attributed to sequential intermittent damming at three different places; (i) Raunthi Gadhera was dammed first in its upper reaches, (ii) Rishiganga river was then dammed to the north of Murunna, and (iii) finally Dhauliganga river was dammed around Rini village to the upstream of its confluence with Rishiganga river. Lacking warning system only enhanced the flood-induced devastation. Legally binding disaster risk assessment regime, together with robust warning generation, and dissemination infrastructure are therefore recommended for all major infrastructure projects.
印度北阿坎德邦连续筑坝引发冬季山洪暴发
2021年2月7日,印度喜马拉雅地区的道里甘加洪水导致位于里希甘加(13.2兆瓦)和塔波班(520兆瓦)附近的两个水电项目受损,造成204人死亡。这种情况发生在冬季,当时冰川河流的流量最小,并且在洪水发生时该地区没有降雨。尽管主要河流里希甘加河(Rishiganga)因在其与Raunthi Gadhera的汇合处上游筑坝而没有受到洪水的影响,但根据实地证据,这次洪水中大约600万立方米的水量是由于在三个不同的地方连续的间歇性筑坝造成的;(i) Raunthi Gadhera首先在其上游筑坝,(ii) riishiganga河随后在Murunna北部筑坝,(iii)最后在riini村周围的Dhauliganga河与riishiganga河汇合处的上游筑坝。缺乏预警系统只会加剧洪水造成的破坏。因此,建议为所有重大基础设施项目建立具有法律约束力的灾害风险评估制度,以及强有力的预警和传播基础设施。
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来源期刊
CiteScore
2.30
自引率
25.00%
发文量
42
审稿时长
12-24 weeks
期刊介绍: The publishing of CARPATHIAN JOURNAL of EARTH and ENVIRONMENTAL SCIENCES has started in 2006. The regularity of this magazine is biannual. The magazine will publish scientific works, in international purposes, in different areas of research, such as : geology, geography, environmental sciences, the environmental pollution and protection, environmental chemistry and physic, environmental biodegradation, climatic exchanges, fighting against natural disasters, protected areas, soil degradation, water quality, water supplies, sustainable development.
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