JWARP  Vol.11 No.8 , August 2019
Distributed Hydrological Model for Assessing Flood Hazards in Laos
Abstract: Many natural disasters have recently occurred in Laos. Among them, flooding has been the greatest problem. Land use change (deforestation and urbanization) and climate change have played significant roles, and it is important to understand the impacts of these changes on flooding. We have developed an integrated hazard map based on a combination of four hazard maps of flooding, land use change and climate change to assess hazard areas at the national scale. The hazard map was developed using the analytical hierarchy process (AHP) and a hazard index. Finally, we divided the map into four hazard area categories, which include low, medium, intermediate and high. Based on this analysis, the integrated hazard map of Laos indicates that low hazard areas cover 87.44% of the total area, medium hazard areas cover 8.12%, and intermediate and high hazard areas respectively cover 2.42% and 2% of the land area. We compared the results with historical events to confirm that the proposed methodology is valid.
Cite this paper: Phrakonkham, S. , Kazama, S. , Komori, D. and Sopha, S. (2019) Distributed Hydrological Model for Assessing Flood Hazards in Laos. Journal of Water Resource and Protection, 11, 937-958. doi: 10.4236/jwarp.2019.118056.

[1]   Bakker, E.J. (1990) Demand for Rainfall Insurance in the Semi-Arid Tropics of India.

[2]   Jongman, B., Kreibich, H., Apel, H., Barredo, J.I., Bates, P.D., Feyen, L., et al. (2012) Comparative Flood Damage Model Assessment: Towards a European Approach. Natural Hazards and Earth System Sciences, 12, 3733-3752.

[3]   Golian, S., Saghafian, B. and Maknoon, R. (2010) Derivation of Probabilistic Thresholds of Spatially Distributed Rainfall for Flood Forecasting. Water Resources Management, 24, 3547-3559.

[4]   Winsemius, H.C., Aerts, J.C.J.H., van Beek, L.P.H., Bierkens, M.F.P., Bouwman, A., Jongman, B., et al. (2016) Global Drivers of Future River Flood Risk. Nature Climate Change, 6, 381-385.

[5]   Dewan, A.M., Islam, M.M., Kumamoto, T. and Nishigaki, M. (2007) Evaluating Flood Hazard for Land-Use Planning in Greater Dhaka of Bangladesh Using Remote Sensing and GIS Techniques. Water Resources Management, 21, 1601-1612.

[6]   Tehrany, M.S., Pradhan, B. and Jebur, M.N. (2013) Spatial Prediction of Flood Susceptible Areas Using Rule Based Decision Tree (DT) and a Novel Ensemble Bivariate and Multivariate Statistical Models in GIS. Journal of Hydrology, 504, 69-79.

[7]   Metz, B., Davidson, O.R., Bosch, P.R., Dave, R. and Meyer, L.A., Eds. (2007) Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, UK and New York, USA.

[8]   Westra, S., Fowler, H.J., Evans, J.P., Alexander, L.V., Berg, P., Johnson, F., et al. (2014) Future Changes to the Intensity and Frequency of Short-Duration Extreme Rainfall. Reviews of Geophysics, 52, 522-555.

[9]   Marzocchi, W., Garcia-Aristizabal, A., Gasparini, P., Mastellone, M.L. and Ruocco, A.D. (2012) Basic Principles of Multi-Risk Assessment: a Case Study in Italy. Natural Hazards, 62, 551-573.

[10]   Douglas, J. (2007) Physical Vulnerability Modelling in Natural Hazard Risk Assessment. Natural Hazards and Earth System Sciences, 7, 283-288.

[11]   Bovolo, C.I., Abele, S.J., Bathurst, J.C., Caballero, D., Ciglan, M., Eftichidis, G. and Simo, B. (2009) A Distributed Framework for Multi-Risk Assessment of Natural Hazards Used to Model the Effects of Forest Fire on Hydrology and Sediment Yield. Computers & Geosciences, 35, 924-945.

[12]   Fernández, D.S. and Lutz, M.A. (2010) Urban Flood Hazard Zoning in Tucumán Province, Argentina, Using GIS and Multicriteria Decision Analysis. Engineering Geology, 111, 90-98.

[13]   Kazakis, N., Kougias, I. and Patsialis, T. (2015) Assessment of Flood Hazard Areas at a Regional Scale Using an Index-Based Approach and Analytical Hierarchy Process: Application in Rhodope-Evros Region, Greece. Science of the Total Environment, 538, 555-563.

[14]   Stefanidis, S. and Stathis, D. (2013) Assessment of Flood Hazard Based on Natural and Anthropogenic Factors Using Analytic Hierarchy Process (AHP). Natural Hazards, 68, 569-585.

[15]   Gigovic, L., Pamucar, D., Bajic, Z. and Drobnjak, S. (2017) Application of GIS-Interval Rough AHP Methodology for Flood Hazard Mapping in Urban Areas. Water, 9, Article ID: 360.

[16]   Todd, C.E.D., Goss, A.M., Tripathy, D. and Harbor, J.M. (2007) The Effects of Landscape Transformation in a Changing Climate on Local Water Resources. Physical Geography, 28, 21-36.

[17]   Pumo, D., Arnone, E., Francipane, A., Caracciolo, D. and Noto, L.V. (2017) Potential Implications of Climate Change and Urbanization on Watershed Hydrology. Journal of Hydrology, 554, 80-99.

[18]   (2012) ADPC: Lao PDR National Assessment Report on Disaster Risk Reduction. Laos National Report.

[19]   Kazama, S., Hyejin, K. and Sawamoto, M. (2004) Uncertainty of Morphological Data for Rainfall-Runoff Simulation. Proceedings of the International Conference on Sustainable Water Resources Management in the Changing Environment of the Monsoon Region, Colombo Sri Lanka, 17-19 November 2004, 400-406.

[20]   Kashiwa, S., Asaoka, Y. and Akira, K. (2010) Flood Analysis Modeling of Snow Melting and Estimation. Proceeding of the rivers technology, 1-4 December 2010, 289-294.

[21]   Moriasi, D.N., Arnold, J.G., van Liew, M.W., Bingner, R.L., Harmel, R.D. and Veith, T.L. (2007) Model Evaluation Guidelines for Systematic Quantification of Accuracy in Watershed Simulations. American Society of Agricultural and Biological Engineers, 50, 885-900.

[22]   Priest, S.J., Tapsell, S., Penning-Rowsell, E. and Viavattene, C. (2008) Building Models to Estimate Loss of Life for Flood Events.

[23]   Gebremicael, T.G., Mohamed, Y.A., Betrie, G.D., van der Zaag, P. and Teferi, E. (2013) Trend Analysis of Runoff and Sediment Fluxes in the Upper Blue Nile basin: A Combined Analysis of Statistical Tests, Physically-Based Models and Landuse Maps. Journal of Hydrology, 482, 57-68.

[24]   van Chuong, H. (2008) Multicriteria Land Suitability Evaluation for Crops Using GIS at Community Level in Central Vietnam with Case Study in Thuy Bang-Thua Thien Hue province. International Symposium on Geoinformatics for Spatial Infrastructure Development in Earth and Allied Sciences 2008, Hanoi, Vietnam, 9-11 December 2008.

[25]   Li, Y.-F., Guo, Y. and Yu, G. (2013) An Analysis of Extreme Flood Events during the Past 400 Years at Taihu Lake, China. Journal of Hydrology, 500, 217-225.

[26]   Hirabayashi, Y., Kanae, S., Emori, S., Oki, T. and Kimoto, M. (2008) Global Projections of Changing Risks of Floods and Droughts in a Changing Climate. Hydrological Sciences Journal, 53, 754-772.

[27]   Saaty, T.L. (1994) How to Make a Decision: The Analytic Hierarchy Process. INFORMS Journal on Applied Analytics, 24, 19-43.