Filters








131 Hits in 3.1 sec

The Use of LiDAR-Derived DEM in Flood Applications: A Review

Nur Atirah Muhadi, Ahmad Fikri Abdullah, Siti Khairunniza Bejo, Muhammad Razif Mahadi, Ana Mijic
2020 Remote Sensing  
Furthermore, the challenges and future perspectives regarding DEM LiDAR data for flood mapping and assessment are also reviewed.  ...  Since the conventional methods cannot produce high-resolution digital elevation model (DEM) data, which results in low accuracy of flood simulation results, LiDAR data are extensively used as an alternative  ...  Hence, appropriate roughness maps should be generated for the use of hydrodynamic models for predicting the reliable consequences of flood disasters.  ... 
doi:10.3390/rs12142308 fatcat:jioww2i6xrf6hdr6nogtc25bqy

FLASH FLOOD MODELLING FOR SELECTED AREA IN RIYADH CITY

Husam Abdullah Al Shawi
2018 مجلة بحوث کلیة الآداب . جامعة المنوفیة  
The purpose of this Master's Project was to evaluate and compared low and high resolution elevation in use for assess effects on identification of flooding risk potential areas in Saudi Arabia using Um  ...  More future work needs to be carried out to integrate cadastral information to the DTM processing of LIDAR for higher accurate water flow network generation leading to better modelling.  ...  Simulating floods, On the application of a 2D-hydraulic model for flood hazard and risk assessment.  ... 
doi:10.21608/sjam.2018.146465 fatcat:oyrrhazvgjf6tdrzm6nsyxdlny

Free Global DEMs and Flood Modelling—A Comparison Analysis for the January 2015 Flooding Event in Mocuba City (Mozambique)

Julio Garrote
2022 Water  
All these results highlight the step forward that Copernicus DEM represents for flood hazard analysis in developing countries, along with the use of so-called "citizen science" in the form of flooding  ...  Up to eight DEMs (ALOS Palsar, Aster GDEM, Bare Earth DEM, SRTM DEM, Merit DEM, TanDEM-X DEM, NASA DEM, and Copernicus DEM) of different data acquisition, spatial resolution, and data processing were used  ...  Conclusions The city of Mocuba (Mozambique) has been selected to perform an assessment of free global DEMs and hydrodynamic modelling for flood hazard analysis.  ... 
doi:10.3390/w14020176 fatcat:4qbisq4bpbh63g63xchtids27i

Influence of Elevation Data Source on 2D Hydraulic Modelling

Krzysztof Bakuła, Mateusz StĘpnik, Zdzisław Kurczyński
2016 Acta Geophysica  
For such an analysis a statistical evaluation and differences between hydraulic modelling results were prepared.  ...  From the results of five 2D hydrodynamic models with different input elevation data, the maximum depth and flow velocity of water were derived and compared with the results of the most accurate ALS data  ...  The module of MIKE FLOOD was used, which allowed for the combination of 1D and 2D hydraulic models with lateral connections.  ... 
doi:10.1515/acgeo-2016-0030 fatcat:rbgk27gud5ec5numwwjqbwputm

Modelling glacial lake outburst flood impacts in the Bolivian Andes

Ioannis Kougkoulos, Simon J. Cook, Laura A. Edwards, Leon J. Clarke, Elias Symeonakis, Jason M. Dortch, Kathleen Nesbitt
2018 Natural Hazards  
We generated 2-m resolution DEMs from stereo and tri-stereo SPOT 6/7 satellite images to drive a hydrodynamic model of GLOF flow (HEC-RAS 5.0.3).  ...  For sensitivity analysis, we ran the model for three scenarios (pessimistic, intermediate, optimistic), which give a range of ~ 1100 to ~ 2200 people affected by flooding; between ~ 800 and ~ 2100 people  ...  We thank the British Society for Geomorphology and the University of Manchester for fieldwork funding. We also thank the European Space Agency (Grant ID-32966) for the SPOT-6/7 imagery provided.  ... 
doi:10.1007/s11069-018-3486-6 fatcat:tm2zoyti35ecrmvgmce2vnviji

An improved method to represent DEM uncertainty in glacial lake outburst flood propagation using stochastic simulations

Cameron S. Watson, Jonathan Carrivick, Duncan Quincey
2015 Journal of Hydrology  
Here, a new stochastic first-pass assessment technique was evaluated 12 against an existing GIS-based model and an existing 1D hydrodynamic model, using three 13 DEMs with different spatial resolution.  ...  Incorporation of a stochastic 4 variable provides an illustration of uncertainty that is important when modelling and 5 communicating assessments of an inherently complex process. 6  ...  Retrospectively applying a DEM error 17 model to the output of a hydrodynamic model (e.g. Figure 8d) allows an assessment of 18 uncertainty within the modelled flood extent.  ... 
doi:10.1016/j.jhydrol.2015.08.046 fatcat:f6s2seeagbc7rh2wf75ezwthwm

LiDAR DEM Data for Flood Mapping and Assessment; Opportunities and Challenges: A Review

Gizachew Kabite Wedajo
2017 Journal of Remote Sensing & GIS  
The aim of this review is, therefore, to identify the opportunities and challenges of using LIDAR DEM data for flood mapping and assessment.  ...  LiDAR DEM data based flood modeling approach solves some of the limitations of Earth observation. On the other hand, flood modeling using LiDAR DEM data are challenging.  ...  [19] , Digital Surface Models (DSMs) derived from LiDAR system improved 1D and 2D hydraulic models, provide valuable data for 2D hydrodynamic models, enable grain-scale surface roughness (an essential  ... 
doi:10.4172/2469-4134.1000211 fatcat:eq3avuqvgjfirc6pci4ryjxoo4

One- and Two-Dimensional Hydrological Modelling and Their Uncertainties [chapter]

Mohd Talha Anees, Khiruddin Abdullah, Mohd Nawawi Mohd Nordin, Nik Norulaini Nik Ab Rahman, Muhammad Izzuddin Syakir, Mohd. Omar Abdul Kadir
2017 Flood Risk Management  
Flooding is also a part of the complex processes, which need to be assessed accurately to know the accurate spatial and temporal changes of flooding and their causes.  ...  Hydrological modelling has been used by several researchers in river and floodplain modelling for flood analysis.  ...  Acknowledgements We would also like to acknowledge Universiti Sains Malaysia for providing the financial support through grants 203/PJJAUH/6764002 and 1001/PTEKIND/8011021 to carry out this work.  ... 
doi:10.5772/intechopen.68924 fatcat:l435ruxmtfae3gg2kpdwcjocta

Analysis of Hydrological Sensitivity for Flood Risk Assessment

Sanjay Sharma, Young-Joo Kwak, Rakesh Kumar, Bibhash Sarma
2018 ISPRS International Journal of Geo-Information  
Tarekegn et al. [14] used a DEM generated from the ASTER image of a study area in Ethiopia.  ...  Paiva et al. [15] demonstrated the use of SRTM DEM in a large-scale hydrologic model with a full 1-D hydrodynamic module to calculate flow propagation on a complex river network.  ...  Sharma contributed to perform all the processes and in analysing the data to develop a flood inundation map using satellite data and the RRI model.  ... 
doi:10.3390/ijgi7020051 fatcat:qydtev6m3vecdhtkycvsvikosm

Overcoming data scarcity in flood hazard assessment using remote sensing and artificial neural network

Dong-Eon Kim, Philippe Gourbesville, Shie-Yui Liong
2019 Smart Water  
Flood map scenarios were generated using improved SRTM and design storms of 10-, 50-and 100-year re-turn periods were constructed using the MIKE 21 hydrodynamic model.  ...  This novel approach is innovative and cost-effective for flood hazard assessment using remote sensing and ANN to overcome lack of data.  ...  Availability of data and materials SRTM and Sentinel 2 are publicly accessible through the online.  ... 
doi:10.1186/s40713-018-0014-5 fatcat:f65euyks2nes3mkitaouaesj6y

A framework of numerical simulation on moraine-dammed glacial lake outburst floods

Xiujuan Zhang, Shiyin Liu
2015 Journal of Arid Land  
.: A framework of numerical simulation on moraine-dammed glacial lake outburst floods 729 the uncertainties and challenges in the GLOF model chain were discussed in detail.  ...  Here we presented a synthesis of GLOF-related studies including triggering mechanism(s), dam breach modeling, and flood routing simulation that have been employed to reconstruct or forecast GLOF hydrographs  ...  The ASTER-derived DEM is suggested for model application in remote and poorly documented high-mountain regions worldwide.  ... 
doi:10.1007/s40333-015-0133-x fatcat:6x2bvtt6nzbbrko3swqj2tiy44

Assessing the impact of hydrodynamics on large-scale flood wave propagation – a case study for the Amazon Basin

Jannis M. Hoch, Arjen V. Haag, Arthur van Dam, Hessel C. Winsemius, Ludovicus P. H. van Beek, Mark F. P. Bierkens
2016 Hydrology and Earth System Sciences Discussions  
Validating modelled discharge results shows that coupling PCR-GLOBWB to a hydrodynamic routing scheme generally increases model performance compared to using a hydrodynamic and hydrologic model only for  ...  As spatial resolution is an influential factor, future studies will also have to focus on the impact of re-fining spatial resolution of the hydrologic input and the flexible mesh used for hydrodynamic  ...  This study was financed by the EIT Climate-KIC programme under project title "Global high-resolution database 15 of current and future river flood hazard to support planning, adaption and re-insurance"  ... 
doi:10.5194/hess-2016-442 fatcat:5luth4cfuzgmdblbbpxn5nrltu

Influence of different sources of topographic data on flood mapping: urban area São Vendelino municipality, southern Brazil

Fernando Campo Zambrano, Masato Kobiyama, Marco Alésio Figueiredo Pereira, Gean Paulo Michel, Fernando Mainardi Fan
2020 Revista Brasileira de Recursos Hídricos  
Generally, the base for any flood mapping is the topography information whose resolution determines the map accuracy.  ...  Model (DEM) configurations, among which two were freely available, and the other was generated with field survey (topography and bathymetry).  ...  The first and the second author thank for the scholarship the Coordination for the Personnel Improvement of Higher Education (CAPES) and the Brazilian National Council for Scientific and Technological  ... 
doi:10.1590/2318-0331.252020190108 fatcat:dkesr7ckeffsrduf6eqae5t66a

A Review of Coupled Hydrologic-Hydraulic Models for Floodplain Assessments in Africa: Opportunities and Challenges for Floodplain Wetland Management

Innocent C. Chomba, Kawawa E. Banda, Hessel C. Winsemius, Machaya J. Chomba, Mulema Mataa, Victoria Ngwenya, Henry M. Sichingabula, Imasiku A. Nyambe, Bruce Ellender
2021 Hydrology  
In this paper, we propose a synthesis of the state of art concerning coupled hydrologic and hydraulic models for floodplains assessments in Africa.  ...  large basin for floodplain assessments through the use of available open access models, coupling frameworks and remotely sensed datasets.  ...  Thanks are also due to the anonymous reviewers for their comprehensive review of the paper and for their many helpful suggestions.  ... 
doi:10.3390/hydrology8010044 fatcat:ofr5tvustbhh5pebfcyu37hzfm

Flood Hazard Assessment for the Tori Levee Breach of the Indus River Basin, Pakistan

Babar Naeem, Muhammad Azmat, Hui Tao, Shakil Ahmad, Muhammad Umar Khattak, Sajjad Haider, Sajjad Ahmad, Zarif Khero, Christopher R. Goodell
2021 Water  
In this study, 2D unsteady flow modeling performed for Tori Levee breach computed residual flood inundation by coupling a HEC-RAS (Hydrological Engineering Centre—River Analysis System) 2D hydraulic model  ...  stage), 84% match for the maximum flood inundation area, and 73.2% for the measure of fit.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/w13050604 fatcat:fkkjvrqxdzbf5pxfcdh3odg4z4
« Previous Showing results 1 — 15 out of 131 results