RURAL FLASH-FLOOD BEHAVIOR IN GOUYAVE WATERSHED, GRENADA, CARIBBEAN ISLAND

DOI: https://doi.org/10.14710/geoplanning.3.2.161-170
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Submitted: 26-09-2016
Published: 25-10-2016
Section: Articles
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Flash-flood is considered as one of the most common natural disasters in Grenada, a tropical small state island in Caribbean Island. Grenada has several areas which are susceptible to flooding. One of them is Gouyave town which is located in the north-west of Grenada. Its land-use types are highly dominated by green areas, especially in the upper-part of the region. The built-up areas can only be found in the lower-part of Gouyave watershed, near the coastal area. However, there were many land conversions from natural land-use types into built-up areas in the upper-part region. They affected the decrease of water infiltration and the increase of potential run-off, making these areas susceptible to flash-flood. In addition, it is also influenced by the phenomenon of climate change. Changes in extreme temperature increase higher potential of hurricanes or wind-storm, directly related to the potential escalation of flash-flood. To develop effective mitigation strategies, understanding the behavior of flash-flood is required. The purpose of this paper was to observe the behavior of flash-flood in Gouyave watershed in various return periods using OpenLISEM software. It was used to develop and analyse the flash-flood characteristics. The result showed that the climatic condition (rainfall intensity) and land-use are influential to the flash-flood event. Flash-flood occurs in 35 and 100 years return period. Flash-flood inundates Gouyave’s area in long duration, with below 1 m flood depth. The flood propagation time is slow. This condition is also influenced by the narrower and longer of Gouyave basin shape. To develop flash-flood reduction strategies, the overall understanding of flash-flood behavior is important. If the mitigation strategy is adapted to their behavior, the implementation will be more optimum.

Keywords

Gouyave watershed; modelling; OpenLISEM; rural; flash-flood behavior

  1. Rahmat Aris Pratomo 
    Earth System Analysis, Faculty of-Geo Information Science and Earth Observation (ITC), University of Twente, Enschede, Netherlands
  2. Victor Jetten 
    Earth System Analysis, Faculty of-Geo Information Science and Earth Observation (ITC), University of Twente, Enschede, Netherlands
  3. Dinand Alkema 
    Earth System Analysis, Faculty of-Geo Information Science and Earth Observation (ITC), University of Twente, Enschede, Netherlands
  1. Bodoque, J. M., et al. (2016). Improvement of resilience of urban areas by integrating social perception in flash-flood risk management. Journal of Hydrology, 541, 665–676. [CrossRef]

  2. Cao, S., et al. (2008). Modeling on flash flood disaster induced by bed load. Transactions of Tianjin University, 14(4), 296–299. [CrossRef]  

  3. Cooper, V., & Opadeyi, J. (2006). Flood hazard mapping of st. Lucia. Retrieved from http://www.caribank.org/wp-content/uploads/2012/03/stlucia-final-flood-hazard-report.pdf

  4. Creutin, J.-D., & Borga, M. (2003). Radar hydrology modifies the monitoring of flash-flood hazard. Hydrological Processes, 17(7), 1453–1456. [CrossRef]  

  5. De Roo, A. P., & Jetten, V. (1999). Calibrating and validating the LISEM model for two data sets from the Netherlands and South Africa. CATENA, 37(3–4), 477–493. [CrossRef]  

  6. Gaitan, S., ten Veldhuis, M., & van de Giesen, N. (2015). Spatial Distribution of Flood Incidents Along Urban Overland Flow-Paths. Water Resources Management, 29(9), 3387–3399. [CrossRef]  

  7. GFDRR. (2010). Disaster Risk Management in Latin America and the Caribbean Region. Retrieved from http://www.gfdrr.org/sites/gfdrr.org/files/DRM_LAC_CountryPrograms.pdf

  8. Jetten, V. (2014). A brief guide to openLISEM. Electronic document.

  9. Karagiorgos, K., et al. (2016). Integrated flash flood vulnerability assessment: Insights from East Attica, Greece. Journal of Hydrology, 541, 553–562. [CrossRef]  

  10. Kourgialas, N. N., & Karatzas, G. P. (2011). Flood management and a GIS modelling method to assess flood-hazard areas—a case study. Hydrological Sciences Journal, 56(2), 212–225. [CrossRef]  

  11. Kundzewicz, Z. W., et al. (2014). Flood risk and climate change: global and regional perspectives. Hydrological Sciences Journal, 59(1), 1–28. [CrossRef]  

  12. Marchi, L., et al. (2010). Characterisation of selected extreme flash floods in Europe and implications for flood risk management. Journal of Hydrology, 394(1–2), 118–133. [CrossRef]   

  13. Mhonda, A., & others. (2013). Evaluating flash flood risk reduction strategies in built-up environment in Kampala. University of Twente.

  14. Niles, E. (2010). Grenada disaster vulnerability reduction project. Retrieved from http://www.gov.gd/egov/docs/other/DVRP_ EIA_March_2011.pdf    

  15. Patra, J. P., Kumar, R., & Mani, P. (2016). Combined Fluvial and Pluvial Flood Inundation Modelling for a Project Site. Procedia Technology, 24, 93–100. [CrossRef]   

  16. Portugués-Mollá, I., et al. (2016). A GIS-Based Model for the analysis of an urban flash flood and its hydro-geomorphic response. The Valencia event of 1957. Journal of Hydrology, 541, 582–596. [CrossRef]

  17. Prachansri, S. (2007). Analysis of soil and land cover parameters for flood hazard assessment: a case study of the Nam Chun watershed, Phetchabun, Thailand. In Earth Systems Analysis. International Institute for Geo-information Science and Earth Observation (ITC) Enschede, The Netherlands.

  18. Pratomo, R. A. (2015). Flash flood behaviour on a small caribbean island: a comparison of two watersheds on grenada. MSc thesis, Applied Earth Science-Natural Hazard and Disaster Risk Management. ITC, Utrecht University, the Netherlands.

  19. Pratomo, R. A., Jetten, V., & Alkema, D. (2016). A comparison of flash flood response at two different watersheds in Grenada, Caribbean Islands. IOP Conference Series: Earth and Environmental Science, 29, 12004. [CrossRef]

  20. Santangelo, N., et al. (2011). Flood susceptibility assessment in a highly urbanized alluvial fan: the case study of Sala Consilina (southern Italy). Natural Hazards and Earth System Science, 11(10), 2765–2780. [CrossRef]

  21. The Caribbean Disaster Emergency Response Agency (CDERA). (2003). Status of hazard maps vulnerability assessments and digital maps. Retrieved from http://www.eird.org/wiki/images/Hazards_maps_Vulnerability_maps_Grenada.pdf   

  22. Yin, J., et al. (2016). Evaluating the impact and risk of pluvial flash flood on intra-urban road network: A case study in the city center of Shanghai, China. Journal of Hydrology, 537, 138–145. [CrossRef]