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Water-deficit-based drought risk assessments in Taiwan

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  • Jenq-Tzong Shiau
  • Ya-Yi Hsiao

Abstract

Taiwan is located in Western Pacific and receives approximate 2,500 mm rainfall per year. Suffered from inadequate water supply during prolonged and severe droughts, assessing drought risk becomes one of the key tasks of water-resources planning and management in Taiwan. Well-prepared drought mitigation measures require assimilation of physical environment of droughts and human socioeconomic factors. An index-based approach is presented in this study to evaluate drought risk at municipal scale in Taiwan for current status (2008) as well as future scenarios (2021). A multiplicative formula links drought hazard (frequency, duration, and severity of droughts), drought exposure (water use), and drought vulnerability (unreliable water supply) to determine drought risk. This approach quantifies the spatial distribution of drought risk and is able to deal with future changes of water use and water-supply source and to examine their influences on drought risk assessments. The results reveal that the regions that are at great risk in the future are those regions already threaten by drought currently. Changes of future water use and water-supply source would not significantly alter spatial distribution of drought risk and ranking order among regions. These results present a basis for future water-resources planning and economic developments for each municipal region. Copyright Springer Science+Business Media B.V. 2012

Suggested Citation

  • Jenq-Tzong Shiau & Ya-Yi Hsiao, 2012. "Water-deficit-based drought risk assessments in Taiwan," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 64(1), pages 237-257, October.
    • Handle: RePEc:spr:nathaz:v:64:y:2012:i:1:p:237-257
    DOI: 10.1007/s11069-012-0239-9
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    2. Jenq-Tzong Shiau & Jia-Wei Lin, 2016. "Clustering Quantile Regression-Based Drought Trends in Taiwan," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(3), pages 1053-1069, February.
    3. Itziar González Tánago & Julia Urquijo & Veit Blauhut & Fermín Villarroya & Lucia De Stefano, 2016. "Learning from experience: a systematic review of assessments of vulnerability to drought," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 80(2), pages 951-973, January.
    4. Yuan-Chien Lin & En-Dian Kuo & Wan-Ju Chi, 2021. "Analysis of Meteorological Drought Resilience and Risk Assessment of Groundwater Using Signal Analysis Method," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(1), pages 179-197, January.
    5. Itziar González Tánago & Julia Urquijo & Veit Blauhut & Fermín Villarroya & Lucia De Stefano, 2016. "Learning from experience: a systematic review of assessments of vulnerability to drought," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 80(2), pages 951-973, January.
    6. Xiao-Chen Yuan & Yu-Liang Zhou & Ju-Liang Jin & Yi-Ming Wei, 2013. "Risk analysis for drought hazard in China: a case study in Huaibei Plain," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 67(2), pages 879-900, June.

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