Flood hazard assessment under climate change scenarios in the Yang River Basin, Thailand

Shrestha, Sangam; Lohpaisankrit, Worapong

doi:10.1016/j.ijsbe.2016.09.006

Cited by 80 publications

(49 citation statements)

References 47 publications

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“…Flood-prone areas have been computed through a hydraulic numerical model implemented with the use of the HEC-RAS software v5.0.6 (Hydrologic Engineering Center-River Analysis System) [49,50]. HEC-RAS is a physical-based software, developed by the US Army Corps of Engineers, on the fully De Saint Venant equations [51][52][53].…”

Section: Hydraulic Numerical Modelmentioning

confidence: 99%

Flood Hazard Scenarios of the Sirba River (Niger): Evaluation of the Hazard Thresholds and Flooding Areas

Massazza

Tamagnone

Wilcox

et al. 2019

Water

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In Sahelian countries, a vast number of people are still affected every year by flood despite the efforts to prevent or mitigate these catastrophic events. This phenomenon is exacerbated by the incessant population growth and the increase of extreme natural events. Hence, the development of flood management strategies such as flood hazard mapping and Early Warning Systems has become a crucial objective for the affected nations. This study presents a comprehensive hazard assessment of the Nigerien reach of the Sirba River, the main tributary Middle Niger River. Hazard thresholds were defined both on hydrological analysis and field effects, according to national guidelines. Non-stationary analyses were carried out to consider changes in the hydrological behavior of the Sirba basin over time. Data from topographical land surveys and discharge gauges collected during the 2018 dry and wet seasons were used to implement the hydraulic numerical model of the analyzed reach. The use of the proposed hydraulic model allowed the delineation of flood hazard maps as well the calculation of the flood propagation time from the upstream hydrometric station and the validation of the rating curves of the two gauging sites. These significative outcomes will allow the implementation of the Early Warning System for the river flood hazard and risk reduction plans preparation for each settlement.

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Section: Hydraulic Numerical Modelmentioning

confidence: 99%

Flood Hazard Scenarios of the Sirba River (Niger): Evaluation of the Hazard Thresholds and Flooding Areas

Massazza

Tamagnone

Wilcox

et al. 2019

Water

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“…In brief, the abovementioned studies showed a corresponding trend towards climate and land use change, which can worsen and trigger an increase in both the magnitude and frequency of extreme flood events and could directly pose a great threat to human well-being and economic development. However, the quantification of expected flood damage in monetary terms was not quantitatively evaluated in the aforementioned studies [7][8][9][12][13][14][15][16][17], as they opted to focus more on flow regime (i.e., magnitude, frequency) or flood characteristics (i.e., depth of inundation, duration, and area inundated). To close the knowledge gap, this study aimed to quantify the impacts of climate and land use changes on flood damage (on both a monetary basis and a threat basis, i.e., flood depth, duration, and extent) at different levels of recurrence.…”

Section: Introductionmentioning

confidence: 99%

Anticipating of Potential Climate and Land Use Change Impacts on Floods: A Case Study of the Lower Nam Phong River Basin

Kuntiyawichai

Sri-Amporn

Wongsasri

et al. 2020

Water

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This study aimed at quantifying the impacts of climate and land use changes on flood damage on different flood occurrences. A Hydrologic Engineering Center’s Hydrologic Modeling System (HEC-HMS) model was calibrated for the period 2005–2011 and validated in the period 2012–2017, and was used to generate hydrographs using rainfall during the period 2020–2039 from CNRM-CM5, IPSL-CM5A-MR, and MPI-ESM-LR climate models under Representative Concentration Pathways (RCPs) 4.5 and 8.5. A Hydrologic Engineering Center’s River Analysis System (HEC-RAS) model for use in generating inundation maps from hydrographs produced by HEC-HMS was calibrated and validated for 2010 and 2011 period, respectively. The climate and land use changes showed insignificant impacts on the extent of floods during 25-, 50-, and 100-year flood events, i.e., inundation in 2039 under RCP 4.5 is smaller than baseline (2000–2017) by 4.97–8.59 km2, whereas a larger difference of inundation is found for RCP 8.5 (0.39–5.30 km2). In contrast, the flood damage under RCP 4.5 (14.84–18.02 million US$) is higher than the baseline by 4.32–5.33 million US$, while the highest was found for RCP 8.5 (16.24–18.67 million US$). The agriculture was the most vulnerable, with a damage of 4.50–5.44 million US$ in RCP 4.5 and 4.94–5.72 million US$ in RCP 8.5, whereas baseline damages were 4.49–6.09 million US$. Finally, the findings are useful in the delivery of flood mitigation strategies to minimize flood risks in the lower Nam Phong River Basin.

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“…However, these impacts vary from place to place on a regional scale under climate change [15,16]. For sustainable development, a basin-scale assessment of impacts of climate change on flooding is necessary [17,18]. The impact studies on the affected basins under climate change were started off as a result of the recent flooding events across the country [12,19,20].…”

Section: Introductionmentioning

confidence: 99%

Climate change impact on fluvial flooding in the Indian sub-basin: A case study on the Adyar sub-basin

et al. 2019

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Flooding is one of the most disastrous global hazards, which has been occurring more frequently in recent times. It is observed that climate change is likely to increase the intensity and the frequency of floods and river basins have become more vulnerable to fluvial flooding. In this study, the impact of climate change on fluvial flooding was analyzed over the Adyar sub-basin. This study applied statistically downscaled Global Climate Model (GCM) data in a CMIP5 dataset of IPCC Assessment Report 5 (AR5). Based on the performance to simulate the observed climate, four GCMs, namely, cesm1-cam5, mpi-esm-mr, ncar-ccsm4, and bnu-esm, for RCP 4.5 were selected for projections of the future scenario. The Intensity-Duration-Frequency (IDF) curves for the past and future scenarios were derived from the IMD-observed and GCM-projected rainfall data. Integrated flood modeling was performed with hydrologic (HEC-HMS) and hydraulic (HEC-RAS) models. Finally, in order to visualize the inundation areas according to the future climate projection, flood inundation maps were prepared geospatially using the ArcGIS software. For the 100-year return period, the results predict that the peak discharge for the future climate scenario would increase by 34.3%–91.9% as compared to the present climate scenario. Similarly, the future projections show an increase in the flooded area ranging from 12.6% to 26.4% based on GCMs. This simulation helps in understanding the flood risk over the Adyar sub-basin under the changing climate and the requirement for the regulation of developmental activities over the flood-prone areas.

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Flood hazard assessment under climate change scenarios in the Yang River Basin, Thailand

Cited by 80 publications

References 47 publications

Flood Hazard Scenarios of the Sirba River (Niger): Evaluation of the Hazard Thresholds and Flooding Areas

Flood Hazard Scenarios of the Sirba River (Niger): Evaluation of the Hazard Thresholds and Flooding Areas

Anticipating of Potential Climate and Land Use Change Impacts on Floods: A Case Study of the Lower Nam Phong River Basin

Climate change impact on fluvial flooding in the Indian sub-basin: A case study on the Adyar sub-basin

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