IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Flood risk management and adaptation : Deterministic hydrological modeling and grid size sensitivity analysis for flood risk assessment of ...
Deterministic hydrological modeling and grid size sensitivity analysis for flood risk assessment of mexico city
Mexico City is facing problems of flooding in some areas at certain times of the year, causing important losses and
damages on properties and residents including some casualties. Therefore, it is important to carry out a flood risk
assessment in the catchment of Mexico City and estimate damages of probable flood events. However, limited data of
observed discharges and water depths in the main rivers of the city are available. The premise of this study is that with
the limited data and resources available, the catchment can be represented with an acceptable degree by the
construction of a deterministic hydrological model of the Mexico City basin using the MIKE SHE software; and the
resulting discharges in the rivers can be used to carry out a flood hazard assessment. The discharges in 7 rivers, and
the water level downstream, were input in MIKE 21 as boundaries for the model. Furthermore, these results were used in
the MIKE 21 model for assessing the extent of the areas of flood risk and the flood depth in Mexico City. In addition, the
effect of changing the resolution of topographic data was studied to determine the impact of DEM accuracy and case
studies on the effect of resolution of topographic data are discussed in Section 2.3. DEMs with larger grid sizes have
less detailed information as they have one elevation value for a larger area. DEMs with high resolution or smaller grid
sizes represent elevations of smaller areas and can better represent the smaller topographic details., and a grid size
sensitivity analysis was carried out for the topography in MIKE 21. Grid sizes of 50 m, 30 m and 20 m were used in
MIKE 21 to create flood maps and analyze the differences in the results of flood extents and depths
File Size : 998,045 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Flood risk management and adaptation
Date Published : 28/08/2015
Download Now