All events are in Central time unless specified.

M.S. Thesis Defense - Betty Makena

Analysis of Drought-Flood Abrupt Alternation Events and Their Impacts in Kenya

2:00 pm – 3:00 pm
Hardin Hall Room: 207 South
3310 Holdrege St
Lincoln NE 68583
Additional Info: HARH
Virtual Location: Zoom Webinar
Target Audiences:
Tsegaye Tadesse,
Under the changing climate, the frequency of compound disaster events has increased. Specifically, the alternation between droughts and floods has become predominant globally. At least 11% of global droughts have been followed by at least one flood event. Drought-Flood Abrupt Alternation (DFAA) is a compound disaster event that refers to the abrupt shift of extreme drought events to extreme floods resulting in exacerbated impacts on already vulnerable communities and hindering their coping abilities. This study aimed to analyze drought-flood abrupt alternation events and their impacts in Kenya. The first chapter aimed to understand historical drought events in the Greater Horn of Africa and their impacts, while drawing comparisons with the recent 2020-2022 drought period, referred to as the ‘triple dip La Niña’. Datasets used in this study include the Climate Hazards Group InfraRed Precipitation with Station (CHIRPS), Normalized Difference Vegetation Index, soil moisture, and crop yield data to conduct spatial-temporal analyses of drought conditions and their impacts. The second chapter aimed to analyze the abrupt shift between drought and floods in Kenya. The Long Cycle Drought-Flood Abrupt Alternation Index (LDFAI) was used to analyze DFAA events from 1982 to 2024. In addition, DFAA events were integrated with impact and crop yield data. The results indicated a decrease in the intensity but increased frequency of drought events, resulting in increased drought impacts compared to historical high-magnitude drought events. The study also identifies two types of abrupt shift events: Drought to Droughts (DTD) and Drought to Floods (DTF). DTF events have been predominant in the last century where since 2012 there have been nine DTF events resulting to reduced crop yields. The insight from this study aims to advance understanding of climate change dynamics and offer valuable guidance in updating existing disaster early warning information to mitigate the adverse impacts of climate disasters.?

Download this event to my calendar

This event originated in SNR Seminars & Discussions.