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Geospatial Technologies in Climate Change Disaster Monitoring: Focus on Floods in Dar es Salaam

This presentation examines the critical role of geospatial technologies in monitoring climate change-induced disasters, specifically floods in Dar es Salaam, Tanzania. As climate variability increases the frequency and intensity of flooding, understanding the risks and vulnerabilities becomes essential. The study assesses the impact of floods, identifies population hotspots, and maps exposure levels. It also highlights the need for robust flood hazard mapping and adaptive policies to strengthen community resilience against future climate-related challenges.

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Geospatial Technologies in Climate Change Disaster Monitoring: Focus on Floods in Dar es Salaam

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  1. Relevance of Geospatial Technologies in monitoring Climate Change related disasters in Africa: Special focus on Floods in Dar Es Salaam; Tanzania Shingirirai .S. Mutanga Africa institute of south africa

  2. Presentation Outline

  3. Background • Climate Variability and Change a reality • Increasing Tends. Intensity and Frequency. (ICSU 2012) • Droughts & Floods: 1.5million affected.(WGA 2004)

  4. Terms & Concepts • Climate, Variability, Change and Vulnerability a reality. • ST Deviation of Climate Variable from long term mean. • LT change in the earth's climate. (FAO 2007) • Vulnerability: Degree of susceptibility to extremes; Function of Magnitude. • Climate Change Mitigation and Adaptation • Adaptive Capacity: Ability to plan, prepare and implement measures. • Factors: (Adger 2006) • Question: How can we build resilience to disaster risks? • Geospatial technologies: Key!!!!!!!! Decision Support System for Disaster Management Support Services.

  5. Study Focus • In the light of the increasing disasters and impacts of climate change, adaptation is not an option but a necessity!!. • The risk of floods remain un-explored and the scope of impending losses un-adequately assessed. • Many development plans and policy formations overlook the risk, the impending impact, and coping & mitigation strategies despite the growing concerns of climate change. • Objectives: • Assess the impacts of floods: • Identify the hot spots of population and economic assets. • Map Dar es Salaam’s Exposure and Vulnerability extent to floods. • Assess the present adaptive measures in place.

  6. STUDY FOCUS Dec :2011

  7. The City of Dar es Salaam • Located Greater Horn of EA • Recurrence of Floods. • Hot, with 2 rainy seasons (Oct-Dec & Mar-May) • Rainfall : 1000mm • Temp: 26 degrees Celsius City: Eastern part of the Tanzanian mainland. Area : 1,350 square kilometres. Population : About 4 Million residents. 70% Informal Settlements. 8% Growth Rate

  8. Demography and Economic Characteristics • Demography • Pop: 2.5mil • Pop Density : 1500pple/square km) • Economic • Growing GDP. • Port : • 45% Nation’s gross I manufacturing • 95% International Trade

  9. APPLICATIONS OF GEOSPATIAL TECH

  10. Rainfall Rainfall for the period 1971-2009 Kebede: 2012 Year 2011: killed 11 people. • Recurrence of floods: 38 years recorded.

  11. Flood Risk Mapping

  12. Flood Risk Mapping

  13. Summary Projected Statistics • 140 000 people located within low elevation zones. • Total 8% of people living in below mean sea level= .07% • 100 000 people be exposed by 2030. (Kebede et al 2011) • 225 ooo people exposed by 2070.

  14. Adaptive Capacity Overview

  15. Key Challenges Lack of Capacity Financial Constraints Poor Planning Mushroom of informal Settlements Poor forecasting Lack of public awareness. Overreliance on donor funding

  16. Conclusion • Climate change is a reality and there is need to deal with its effects such as floods. • The development of a comprehensive flood hazard map would be one of the most crucial steps for implementing non-structural remedial measures. • Provision of case studies that map community vulnerability areas is key in building resilience to natural disasters such as floods. • This study through the use of geospatial technologies aid in draw out implications for adaptation and adaptive policy.

  17. Further Analysis/Research • Exposed population and Assets. • Delineation of Settlements and industries prone to floods. • Economic Value of estimated exposed assets. • Dual combination of bursting streams and rising sea level impacts. • Gaps: Social dimensions, participatory approaches, lack of up to date information.

  18. THANK YOU

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