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Dam-break flood Simulation under Various Likely Scenarios and mapping Using GIS:Case of a Proposed Dam on River Yamuna,India

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Journal of Mountain Science 2012年第2期9卷 214-220页

作者： Mahendra S.LODHI Devendra K.AGRAWAL GB Pant Institute of Himalayan Environment and Development North-East Unit AGM-Environment Energy Infratech Pvt.Ltd.

The precision modeling of dam break floods can lead to formulation of proper emergency action plan to minimize flood impacts within the economic lifetime of the *** of GIS techniques in integration with hydrological modeling for mapping of the flood inundated areas can play a momentous role in further minimizing the risk and likely *** the present study,dam break analysis using DAMBRK model was performed under various likely *** Maximum flood (PMF)calculated for a return period of 1000 years using deterministic approach was adopted for dam break analysis of the proposed dam under various combinations of breach *** available downstream river cross-sections data sets were used as input in the model to generate the downstream flood *** break flow depths generated by the DAMBRK model under various combinations of structural failure are subsequently plotted on Digital Elevation Model(DEM)of the downstream of dam site to map the likely affected *** simulation results reveals that in one particular case the flood without dam may be more intense if a rainfall of significant intensity takes place.

关键词： Dam break analysis DAMBRK GIS flood mapping Hydropower India

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The independent service validation in GMES RESPOND:the flood validation exercise

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International Journal of Digital Earth 2011年第S1期4卷 58-76页

作者： M.Shimoni M.Crosetto S.Lang P.Bally F.Boubila Electrical Engineering Department Signal and Image CentreBelgian Royal Military Academy30Ave de la Renaissance1000BrusselsBelgium Active Remote Sensing Unit Institute of GeomaticsCastelldefelsAvinguda Gauss11E-08860CastelldefelsBarcelonaSpain Z_GIS-Centre for Geoinformatics University of SalzburgSchillerstr 305020SalzburgAustria Science Applications and Future Technologies DepartmentDirectorate of EO ProgrammesEuropean Space AgencyVia Galileo Galileisnc00044Frascati(Roma)Italy

This article is aimed at providing a detailed description of the flood Validation Exercise organised by the Independent Service Validation Group of the Global Monitoring for Environment and Security(GMES)RESPOND *** aims of the validation exercise were:(1)providing a practical example of validation procedures in the frame of the GMES Emergency Response services;(2)executing a full-scale validation exercise able to cope with the requirements of an emergency service;and(3)better understanding the performances and limitations of Earth observation services for flood Damage *** validation exercise is a first step of the main task to define the whole validation process for GMES *** this is achieved,there will be knowledge concerning how well services meet the service specifications derived from the user *** present exercise has the purpose of gathering this *** output of this validation exercise can be used to characterise and qualify the performance and timeliness of Crisis and Damage mapping *** paper summarises the methodology for the flood exercise validation and the results of product validation and inter-comparison.

关键词： flood mapping validation exercise product validation inter-comparison

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Use of Sentinel-1 imagery for flood management in a reservoir-regulated river basin

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Frontiers of Earth Science 2018年第3期12卷 506-520页

作者： T. PERROU A. GAR/OUD I. PARCHARIDIS Department of Geography Harokopio University of Athens Athens Greece European Space Agency/ESRIN Frascati Rome Italy Department of Geography University Paris Diderot Paris France

flood hazard monitoring and mapping is of great importance because it represents a significant contribution to risk management. The present study investigated the flood event that occurred downstream from the transboundary Strymon River basin, more specifically at Serres basin-a reservoir-regulated basin, in the beginning of 2015. The focus of this study was to better understand the spatio-temporal dynamic of the flood and the causes that initiated the hazard. Within the Serres basin, the Strymon transboundary river outflows to Lake Kerkini, which regulates water flow downstream for irrigation purposes and flood protection. For this research, a dataset of Sentinel-1 SAR GRD images was collected and processed covering the period of October 2014-October 2015 to investigate the water level changes in Lake Kerkini. Based on SAR images, binary water/non-water products and multitemporal RGB amplitude images were generated and interpreted. Sentinel-1 products have proved to be an effective tool on flood hazard dynamic extension mapping and estimation of water extent bodies retained by small reservoirs. In agreement with hydro-meteorological data and the high-resolution DEM, it was conceived that the flood event occurred due to the water volume flowing from upstream in the reservoir and the large amount of water draining from the tributaries into nearby sub-basins. Moreover, inefficient water management of the overwhelming water flow through the dam could further strengthen the flood event. The proposed approach, which is entirely based on open access remotely sensed data and processing tools, could be implemented in the same area for past flood events to produce archive retrospective data, as well as in other similar reservoir-regulated river basins in terms of water management and flood risk management.

关键词： flood mapping Sentinel-1 SAR binary images multitemporal image river basin

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Development of a Web-Based GIS of flood Zones in the Municipality of Ouagadougou in Burkina Faso

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Journal of Geographic Information System 2024年第1期16卷 32-43页

作者： Halidou Kafando Blaise Ouedraogo Vincent Nduka Ojeh Andreas Rienow Aliou Gadiaga Ibrahim Elh Maman Garba WASCAL Graduate Research Programme on Climate Change and Education Department of Agriculture and Environment Science University of The Gambia Kanifing The Gambia Institute of Environment and Agricultural Research Ouagadougou Burkina Faso Department of Geography Faculty of Social Sciences Taraba State University Jalingo Nigeria Interdisciplinary Geographic Information Science Institute of Geography Ruhr-University Bochum Bochum Germany WASCAL Graduate Research Programme on Climate Change and Human Habitat University of Mina Mina Nigeria

This document describes the creation of an informative Web GIS aimed at mitigating the impacts of flooding in the municipality of Ouagadougou, in Burkina Faso, a region that is highly sensitive to climate change. Burkina Faso, which is undergoing rapid urbanization, faces major natural threats, particularly flooding, as demonstrated by the severe floods of 2009 that caused loss of life, injury, structural damage and economic losses in Ouagadougou. The aim of this research is to develop a web map highlighting the municipality’s flood-prone areas, with a view to informing and raising awareness of flood risk reduction. Using the Leaflet JavaScript mapping library, the study uses HTML, CSS and JavaScript to implement web mapping technology. Data on Ouagadougou’s flood zones is generated by a multi-criteria analysis combining Saaty’s AHP method and GIS in QGIS, integrating seven (7) parameters including hydrography, altitude, slope, rainfall, soil types, land use and soil moisture index. QGIS processes and maps the themes, PostgreSQL with PostGIS serves as the DBMS and GeoServer functions as the map server. The Web GIS platform allows users to visualize the different flood risks, from very low to very high, or the high-risk areas specific to Ouagadougou. The AHP calculations classify the municipality into five flood vulnerability zones: very low (24.48%), low (27.93%), medium (23.01%), high (17.11%) and very high (7.47%). Effective risk management requires communication and awareness-raising. This online mapping application serves as a tool for communication, management and flood prevention in Ouagadougou, helping to mitigate flood-related natural disasters.

关键词： Web GIS flood mapping Leaflet JavaScript mapping Library Analysis Hierarchical Processes (AHP) Climate Change Adaptation Ouagadougou Municipality

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