| Extreme Rainfall Events and Associated Natural Hazards in Alaknanda Valley, Indian Himalayan Region |
| |
| 作者姓名： | JOSHI Varun KUMAR Kireet |
| |
| 作者单位： | GB Pant Institute of Himalayan Environment and Development Sikkim Unit Post Box 24 Gangtok Sikkim India737101，GB Pant Institute of Himalayan Environment and Development Kosi-Katarmal Almora India |
| |
| 基金项目： | Acknowledgements Authors are thankful to Director, G.B. Pant Institute of Himalayan Environment and Development for providing facilities and discussion and the Asia Pacific Network is acknowledged for financial assistance to carry out this study. |
| |
| 摘 要： | Introduction The Himalaya is considered to be the youngest mountains on the earth, and is tectonically very active, and hence inherently (geologically) vulnerable to hazards. Extreme rainfall events, landslides, debris flows, torrents and flash floods due…
|
| 关 键 词： | 洪水 降雨量 印度 季风 |
| 文章编号： | 1672-6316（2006）03-0228-09 |
| 收稿时间： | 2006-04-06 |
| 修稿时间： | 2006-06-12 |
Extreme rainfall events and associated natural hazards in Alaknanda valley, Indian Himalayan region |
| |
| JOSHI Varun KUMAR Kireet.Extreme Rainfall Events and Associated Natural Hazards in Alaknanda Valley, Indian Himalayan Region[J].Journal of Mountain Science,2006,3(3):228-236. |
| |
| Authors: | Varun Joshi Kireet Kumar |
| |
| Institution: | (1) GB Pant Institute of Himalayan Environment and Development Sikkim Unit, Post Box 24, Gangtok, Sikkim, India, 737101;(2) GB Pant Institute of Himalayan Environment and Development Kosi-Katarmal, Almora, India |
| |
| Abstract: | Entire Himalayan region is vulnerable to rain-induced (torrential rainfall) hazards in the form of flash flood, cloudburst or glacial lake outburst flood.Flash floods and cloudburst are generally caused by high intensity rainfall followed by debris flow or landslide often resulting into blockade of river channels. The examples of some major disasters caused by torrential rainfall events in last fifty years are the flash floods of 1968 in Teesta valley, in 1993 and 2000 in Sutlej valley, in 1978 in Bhagirathi and in 1970 in Alaknanda river valleys. The formation of landslide dams and subsequent breaching is also associated with such rainfall events. These dams may persist for years or may burst within a short span of its formation. Due to sudden surge of water level in the river valleys, havoc and panic are created in the down stream. In Alaknanda valley, frequencies of such extreme rainfall events are found to be increasing in last two decades. However, the monthly trend of extreme rainfall events has partly indicated this increase. In most of the years extreme rainfall events and cloudburst disaster were reported inAugust during the later part of the monsoon season. |
| |
| Keywords: | Flash flood Cloudburst Extreme rainfall Alaknanda valley Himalaya India |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
