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Observing a severe flooding over southern part of India in monsoon season of 2019
Journal of Earth System Science ( IF 1.9 ) Pub Date : 2021-02-02 , DOI: 10.1007/s12040-020-01509-7
Anoop Kumar Mishra

Abstract

Kerala is one of the most flood prone states of India due to its geographical location and topography. In recent decades, the frequency and intensity of flood has significantly increased in Kerala. Floods that occurred in the year 2007, 2009, 2014 and 2018 resulted in heavy damage in the form of lives and properties. This research focuses on exploring a recent flood event of Kerala in July–August 2019 using observations from space. Enhanced convective activities over Kerala were resulted due to movement of a low-pressure system westwards from Bay of Bengal towards coastal Arabian Sea under favourable conditions. Results report that excess cumulative rainfall resulting from multi-day extreme precipitation events due to enhanced convection during July and August resulted in catastrophic flood events over various parts of Kerala. Kannur, Wayanad, Kozhikode and Palakkad districts of north Kerala were affected more as compared to other region. Kannur district received a cumulative rainfall of about 1300 mm from multiple rainy spells during July and August of 2019. Peak rainfall was recorded on August 08, 2019. A peak hourly rainfall of about 60 mm/h was recorded at 1230 UTC on August 08 over Kannur district. These multiple heavy to very heavy rainfall episodes led to severe flooding over Kerala resulting in huge damage. Present research emphasizes on the importance of space-borne satellite remote sensing in monitoring of flood events in order to envisage preparedness and mitigation in flood scenarios.

Highlights

  • Flood event over southern part of India has been explored from space observations

  • Kerala, a state in south India, suffered a severe flood due to multi-day heavy precipitation

  • Technique described in this manuscript can be used for disaster preparedness



中文翻译:

观察2019年季风季节印度南部的严重洪灾

摘要

由于喀拉拉邦的地理位置和地形,它是印度最容易发生洪灾的州之一。近几十年来,喀拉拉邦洪水泛滥的频率和强度大大增加。2007年,2009年,2014年和2018年发生的洪灾导致生命财产遭受严重破坏。这项研究着重于利用太空观测结果探索喀拉拉邦最近在2019年7月至8月发生的洪灾事件。由于低压系统在有利的条件下从孟加拉湾向西向阿拉伯沿海海域移动,导致喀拉拉邦对流活动增强。结果报告说,由于七月和八月期间对流的增强,多日极端降水事件导致的累计降雨过多,导致喀拉拉邦各地发生灾难性洪水事件。坎纳尔,瓦亚纳德,与其他地区相比,喀拉拉北部的科泽科德和帕拉卡德地区受到的影响更大。Kannur区在2019年7月和8月期间收到多个降雨期间的累计降雨量约1300 mm。在2019年8月8日记录了峰值降雨量。在8月8日,UTC在1230 UTC记录了每小时约60 mm / h的峰值降雨量。坎努尔区。这些多起特大到非常大的降雨事件导致喀拉拉邦遭受严重洪灾,造成了巨大破坏。目前的研究强调了星载卫星遥感在监测洪水事件中的重要性,以便设想洪水情势下的准备和减灾。Kannur区在2019年7月和8月期间收到多个降雨期间的累计降雨量约1300 mm。在2019年8月8日记录了峰值降雨量。在8月8日,UTC在1230 UTC记录了每小时约60 mm / h的峰值降雨量。坎努尔区。这些多起特大到非常大的降雨事件导致喀拉拉邦遭受严重洪灾,造成了巨大破坏。目前的研究强调了星载卫星遥感在监测洪水事件中的重要性,以便设想洪水情势下的准备和减灾。Kannur区在2019年7月和8月期间收到多个降雨期间的累计降雨量约1300 mm。在2019年8月8日记录了峰值降雨量。在8月8日,UTC在1230 UTC记录了每小时约60 mm / h的峰值降雨量。坎努尔区。这些多起特大到非常大的降雨事件导致喀拉拉邦遭受严重洪灾,造成了巨大破坏。目前的研究强调了星载卫星遥感在监测洪水事件中的重要性,以便设想洪水情势下的准备和减灾。

强调

  • 通过太空观测已探究了印度南部的洪水事件

  • 印度南部的喀拉拉邦因连日降雨而遭受严重洪灾

  • 本手稿中描述的技术可用于备灾

更新日期:2021-02-02
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