Fundamental Analysis for Flood Risk Management in the Selected River Basins of Southeast Asia

Abstract

Flood features were analyzed and risk knowledge was examined in studies in selected river basins of Southeast Asia. Rainfall runoff features were analyzed in Indonesia’s Solo river basin and in the Philippines’ Pampanga and Cagayan river basins using ground-observed and satellite-based (GSMaP) rainfall data. Flood damage was assessed for risk management by considering physical damage to agricultural and household in the Cambodian flood plain of the Lower Mekong Basin and in the Philippines’s Pampanga river basin. A comparison of simulated and observed runoff hydrographs showed that the accuracy of GSMaP rainfall in the Solo and Cagayan river basins in studied flood events was lower than in the Pampanga river basin case. In the Pampanga and Cagayan river basins, the density of rainfall station networks was below the WMO recommendation, and GSMaP rainfall data would be more effective in getting supplementary information for existing flood-forecasting systems for these river basins. Physical damage to households including residential assets and agricultural damage were estimated quantitatively based on flood features. The estimated value of agricultural and house damage was fairly consistent with reported values. Reliable flood damage data are important for developing flood damage functions and for confirming such estimation. Uncertainties associated with input data, model parameters, and damage information strongly influence the damage estimated. These uncertainties must be considered carefully in flood risk assessment models.

Flood risk‐benefit assessment to support management of flood‐prone lands

“…The coupled assessment of flood risks and benefits across a range of return intervals can be an improved information tool to support decisions that can result in practices to reduce flood risk while meeting with potential socio‐economic preferences and environmental objectives (Juarez‐Lucas & Kibler, ). For instance, flood risk assessments in the context of the Philippines have focused on damage evaluation of agriculture and residential buildings or human affections following extreme events (Acosta et al, ; Kure, Jibiki, Iuchi, & Udo, ; Kwak & Iwami, ; Shrestha et al, ). Though evaluations of vulnerability and community adaptations to floods figure prominently (Gaillard et al, ; Lee & Vink, ; Tatlonghari & Paris, ; Uy et al, ; Zoleta‐Nantes, ), analyses of coping capacity within a probabilistic framework are infrequently addressed.…”

“…Damages to rice agriculture are also often reported during typhoon months (Juarez‐Lucas et al, ). While concentration time in Pampanga Basin to Candaba area is usually less than 12 hr (Shrestha et al, ), typhoon‐driven events often result in 2–3 days of heavy rainfall. We, therefore, consider hourly time steps and a simulation period of 30 days.…”

Research Trends on Natural Hazards, Disasters, Risk Reduction and Climate Change in Indonesia: A Systematic Literature Review

“…It is shown that the impact on crops production, mainly on rice has been the majority of those researches (Caruso et al, 285 2016;D'Arrigo et al, 2011;D'Arrigo and Wilson, 2008;Kawanishi and Mimura, 2015;Keil et al, 2009;Naylor et al, 2001;Sano et al, 2013;Shofiyati et al, 2014). This is strongly related to the examination of too much water which can cause flood Marfai et al, 2015Marfai et al, , 2014Muis et al, 2015;Neolaka, 2013Neolaka, , 2012Sarminingsih et al, 2014;Shrestha et al, 2014)or too little water which can or have caused drought in Indonesia (Aldrian and Djamil, 2008;D'Arrigo and Smerdon, 2008;D'Arrigo and Wilson, 2008;D'Arrigo et al, 2006;Keil et al, 290 2009;Keil et al, 2008). A high number of researches are also done on linking droughts (Salafsky, 1994;D'Arrigo et al, 2006;D'Arrigo and Smerdon, 2008;Shofiyati et al, 2014) and fire occurrences (Usman and Hartono, 1997;Fang and Huang, 1998;Brauer and Hisham-Hashim, 1998;Jim, 1999;Stolle and Tomich, 1999;Page et al, 2002;Stolle and Lambin, 2003) especially those on forest fire.…”

“…The next topic that receives greater attention is on the evaluation of recover and reconstruction that have taken place after the 2004 Indian Ocean 235 tsunami which hit Aceh, located in the Island of Sumatera (Chang et al, 2011;Daly and Brassard, 2011;Godavitarne et al, 2006;Guarnacci, 2012;Karan and Subbiah, 2011;Telford and Cosgrave, 2007). Within the period after 2004, other topics that are also related to the impacts of tsunami and disasters in general is the role of culture, gender, or religion in helping the community to be resilient in facing disasters, and also how various disasters in Indonesia have impacted various community groups differently in relation to their culture or gender (Baumann, 2008;Donovan, 2010;Donovan et al, 2012;Gaillard et al, 240 2008b;Islam and Lim, 2015;Balgos et al, 2012;Guarnacci and Di Girolamo, 2012;Hiwasaki et al, 2015;Siagian et al, 2014;Sagala et al, 2009). …”

Research trends on hazards, disasters, risk reduction and climate change in Indonesia: a systematic literature review

“…It is shown that the impact on crops production, mainly on rice has been the majority of those researches (Caruso et al, 2016;D'Arrigo et al, 2011;D'Arrigo and Wilson, 2008;Kawanishi and Mimura, 2015;Keil et al, 2009;Naylor et al, 2001;Sano et al, 2013;Shofiyati et al, 2014). This is strongly related to the examination of too much water which can cause flood (Marfai and King, 2008a;Marfai et al, 2008;Marfai et al, 2014Marfai et al, , 2015Muis et al, 2015;Neolaka, 2012Neolaka, , 2013Sarminingsih et al, 2014;Shrestha et al, 2014)or too little water 345 which can or have caused drought in Indonesia (Aldrian and Djamil, 2008;D'Arrigo and Smerdon, 2008;D'Arrigo and Wilson, 2008;D'Arrigo et al, 2006;Keil et al, 2009;Keil et al, 2008). A high number of researches are also done on linking droughts (D'Arrigo and Smerdon, 2008;D'Arrigo et al, 2006;Salafsky, 1994;Shofiyati et al, 2014) and fire (Brauer and Hisham-Hashim, 1998;Fang and Huang, 1998;Jim, 1999;Page et al, 2002;Stolle and Lambin, 2003;Stolle and Tomich, 1999;Usman and Hartono, 1997) occurrences especially those on forest fire.…”