scholarly journals Emergency planning and optimizations based on dam break flood risk maps visualized with open source web-GIS tool

2019 ◽  
Author(s):  
Nina Dobrinkova ◽  
Stefan Stefanov ◽  
Stefan Hadjitodorov ◽  
Alexander Arakelyan ◽  
Alen Amirkhanian ◽  
...  
Keyword(s):  
Open Source ◽  
Flood Risk ◽  
Dam Break ◽  
Emergency Planning ◽  
Web Gis ◽  
Risk Maps

Validation of flood risk maps using open source optical and radar satellite imagery

2020 ◽  
Vol 24 (5) ◽  
pp. 1208-1226
Author(s):  
Elia Quirós ◽  
Alexandre S. Gagnon
Keyword(s):  
Open Source ◽  
Satellite Imagery ◽  
Flood Risk ◽  
Risk Maps ◽  
Radar Satellite

scholarly journals Towards risk-based flood management in highly productive paddy rice cultivation – concept development and application to the Mekong Delta

2018 ◽  
Vol 18 (11) ◽  
pp. 2859-2876 ◽  
Author(s):  
Nguyen Van Khanh Triet ◽  
Nguyen Viet Dung ◽  
Bruno Merz ◽  
Heiko Apel
Keyword(s):  
Land Use ◽  
Flood Risk ◽  
Large Scale ◽  
Flood Hazard ◽  
Mekong Delta ◽  
Flood Management ◽  
Paddy Rice ◽  
Rice Cultivation ◽  
Spatially Explicit ◽  
Risk Maps

Abstract. Flooding is an imminent natural hazard threatening most river deltas, e.g. the Mekong Delta. An appropriate flood management is thus required for a sustainable development of the often densely populated regions. Recently, the traditional event-based hazard control shifted towards a risk management approach in many regions, driven by intensive research leading to new legal regulation on flood management. However, a large-scale flood risk assessment does not exist for the Mekong Delta. Particularly, flood risk to paddy rice cultivation, the most important economic activity in the delta, has not been performed yet. Therefore, the present study was developed to provide the very first insight into delta-scale flood damages and risks to rice cultivation. The flood hazard was quantified by probabilistic flood hazard maps of the whole delta using a bivariate extreme value statistics, synthetic flood hydrographs, and a large-scale hydraulic model. The flood risk to paddy rice was then quantified considering cropping calendars, rice phenology, and harvest times based on a time series of enhanced vegetation index (EVI) derived from MODIS satellite data, and a published rice flood damage function. The proposed concept provided flood risk maps to paddy rice for the Mekong Delta in terms of expected annual damage. The presented concept can be used as a blueprint for regions facing similar problems due to its generic approach. Furthermore, the changes in flood risk to paddy rice caused by changes in land use currently under discussion in the Mekong Delta were estimated. Two land-use scenarios either intensifying or reducing rice cropping were considered, and the changes in risk were presented in spatially explicit flood risk maps. The basic risk maps could serve as guidance for the authorities to develop spatially explicit flood management and mitigation plans for the delta. The land-use change risk maps could further be used for adaptive risk management plans and as a basis for a cost–benefit of the discussed land-use change scenarios. Additionally, the damage and risks maps may support the recently initiated agricultural insurance programme in Vietnam.

scholarly journals A Generalized Framework for Assessing Flood Risk and Suitable Strategies under Various Vulnerability and Adaptation Scenarios: A Case Study for Residents of Kyoto City in Japan

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2508
Author(s):  
Bing-Chen Jhong ◽  
Yasuto Tachikawa ◽  
Tomohiro Tanaka ◽  
Parmeshwar Udmale ◽  
Ching-Pin Tung
Keyword(s):  
Flood Risk ◽  
Planning Process ◽  
Climate Adaptation ◽  
Adaptation Strategies ◽  
Climate Risk ◽  
Detention Ponds ◽  
Kyoto City ◽  
Generalized Framework ◽  
Risk Maps ◽  
Adaptation Scenarios

This study proposes a generalized framework for the assessment of flood risk and potential strategies to mitigate flood under various vulnerability and adaptation scenarios. The possible causes of hazard, exposure and vulnerability in flood disaster were clearly identified by using a climate risk template. Then, levels of exposure and vulnerability with adaptive capacity and sensitivity were further defined by a quantification approach, and the climate risk maps were consequently provided. The potential possible climate adaptation strategies were investigated through the comparison of climate risk maps with diverse adaptation options. The framework was demonstrated in the Kyoto City in Japan with residents as a target population to reduce the flood risk. The results indicate that the government should pay attention to reducing the population in flood-prone areas and adopt diverse adaptation strategies to reduce the flood risk to the residents. Rainwater storage and green roofs as adaptation strategies as short-term planning options are recommended. The construction of detention ponds has been suggested to prevent flood risks in future as a part of the long-term planning process. In conclusion, the proposed framework is expected to be a suitable tool for supporting climate risk analysis in the context of flood disasters.

scholarly journals Assessing the Governance Context Support for Creating a Pluvial Flood Risk Map with Climate Change Scenarios: The Flemish Subnational Case

2020 ◽  
Vol 9 (7) ◽  
pp. 460 ◽  
Author(s):  
Cesar Casiano Flores ◽  
Joep Crompvoets
Keyword(s):  
Climate Change ◽  
Flood Risk ◽  
Steering Committee ◽  
Provincial Government ◽  
Climate Change Scenarios ◽  
Risk Map ◽  
The Creation ◽  
Risk Maps ◽  
Flood Risk Map ◽  
Subnational Governments

Climate change has increased pluvial flood risks in cities around the world. To mitigate floods, pluvial risk maps with climate change scenarios have been developed to help major urban areas adapt to a changing climate. In some cases, subnational governments have played a key role to develop these maps. However, governance research about the role of subnational governments in geospatial data development in urban water transitions has received little attention. To address this gap, this research applies the Governance Assessment Tool as an evaluative framework to increase our understanding of the governance factors that support the development of pluvial flood risk maps at the subnational level. For this research, we selected the region of Flanders in Belgium. This region is considered among the frontrunners when it comes to the creation of a pluvial flood risk map with climate change scenarios. Data have been collected through in-depth interviews with steering committee actors involved in the development process of the map. The research identified that the current governance context is supportive of the creation of the flood risk map. The government of Flanders plays a key role in this process. The most supportive qualities of the governance context are those related to the degree of fragmentation (extent and coherence), while the less supportive ones are those related to the “quest for control” (flexibility and intensity). Under this governance context, government actors play the primary role. The Flemish government led the maps’ creation process and it was supported by the lower governmental levels. As the provincial government was an important actor to increase local participation, collaboration with private and non-governmental actors in the steering committee was more limited. The financial resources were also limited and the process required a continuous development of trust. Yet, the Flemish Environmental Agency, with the use of technology, was able to increase such trust during the process.

scholarly journals An Approach Based on the Protected Object for Dam-Break Flood Risk Management Exemplified at the Zipingpu Reservoir

2019 ◽  
Vol 16 (19) ◽  
pp. 3786 ◽  
Author(s):  
Fan ◽  
An ◽  
Li ◽  
Li ◽  
Deng ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Risk Management ◽  
Flood Risk ◽  
Demographic Data ◽  
Flood Risk Management ◽  
Dam Break ◽  
Risk Level ◽  
Potential Hazard ◽  
Administrative Division ◽  
Protected Object

Dam-break flooding is a potential hazard for reservoirs that poses a considerable threat to human lives and property in downstream areas. Assessing the dam-break flood risk of the Zipingpu Reservoir in Chengdu, Sichuan Province, China, is critically important because this reservoir is located on the Longmen Shan fault, which experiences high seismic activity. In this paper, we develop an approach based on the protected object for dam-break flood risk management. First, we perform a numerical simulation of dam-break flooding in four possible dam break scenarios. Next, the flood areas are divided into 71 analysis units based on the administrative division. Based on the numerical simulation results and the socio-economic demographic data affected by a flood, the importance and risk level of each analysis unit is confirmed, and the flood risk map is established according to the classification results. Finally, multi-level flood risk management countermeasures are proposed according to the results of the unit classification shown in the map.

Knowledge Integration for Building Resilience—the Example of Flood Risk Maps

2021 ◽  
pp. 17-40
Author(s):  
Gérard Hutter ◽  
Marco Neubert ◽  
Reinhard Schinke ◽  
Jörg Hennersdorf ◽  
Regine Ortlepp ◽  
...  
Keyword(s):  
Flood Risk ◽  
Knowledge Integration ◽  
Building Resilience ◽  
Risk Maps
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