Flood Exposure Maps for Buzi-Pungwe-Save (BuPuSa) Transboundary River Basins

OpenLISEM is an open-source hydrological model suited for the simulation of floods, flash floods and erosion events. The following sections provide an overview of the results from the OpenLISEM model used in the exposure mapping A 30x30m flood map (maximum flood height) for the BuPuSa region was developed for several points on the intensity-frequency-duration curve. This curve represents the extreme value analysis (EVA) for the rainfall across the BuPuSa area. Based on 50 years of historic rainfall data from TAMSAT the EVA is developed for a 1000 year period. From this different rainfall intensities area taken which are referred to at the return period. The statistical possibility of a certain rainfall intensity to happen once in X many years. Flood maps were developed for the following return periods: 1/2, 1/10, 1/50, 1/100 and 1/1000. In addition to 5 different return periods, two different scenarios were modeled. A short high intensity rainfall event that typically causes flash floods, and a longer term lower intensity rainfall event that typically causes fluvial (river) floods. These events were represented by respectively a 6h rainfall event and a 14 day rainfall event. As a result 10 different flood maps were developed.

Data and Resources

  • XML Colourmap.xml

    Colourmap

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  • PNG Legend.png

    Legend

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  • tif Max_water_level_meter_30_BuPuSa_Tamsat_daily_tp_genextreme_rt1000_windowH6

    rt1000 window H6

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  • tif Max_water_level_meter_30_BuPuSa_Tamsat_daily_tp_genextreme_rt100_window14

    rt100 window 14

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  • tif Max_water_level_meter_30_BuPuSa_Tamsat_daily_tp_genextreme_rt100_windowH6

    rt100 window H6

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  • tif Max_water_level_meter_30_BuPuSa_Tamsat_daily_tp_genextreme_rt50_windowH6

    rt50 window H6

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  • TIF BUPUSA Flood Hazard Map (Return Period 50 Years, 14 Day Event)

    This file contains the flood maps generated for the BuPuSa Basin. It shows the flood extent and depth for a 14 day event with a return period of 50 years.

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  • TIF BUPUSA Flood Hazard Map (Return Period 10 Years, 6 Hour Event)

    This file contains the flood maps generated for the BuPuSa Basin. It shows the flood extent and depth for a 6 hour event with a return period of 2 years.

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  • TIF BUPUSA Flood Hazard Map (Return Period 10 Years, 14 Day Event)

    This file contains the flood maps generated for the BuPuSa Basin. It shows the flood extent and depth for a 14 day event with a return period of 10 years.

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  • TIF BUPUSA Flood Hazard Map (Return Period 2 year, 6 Hour Event)

    This file contains the flood maps generated for the BuPuSa Basin. It shows the flood extent and depth for a 6 hour event with a return period of 2 years.

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  • TIF BUPUSA Flood Hazard Map (Return Period 2 year, 14 Day Event)

    This file contains the flood maps generated for the BuPuSa Basin. It shows the flood extent and depth for a 14 day event with a return period of two years.

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  • geotiff BuPuSa - Flood Exposure Map (Rt 2 year, 6 hours)
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  • SLD BuPuSa Flood Maps Style

    This file contains the style file for the flood maps, the same file is used for all maps to compare flood areass

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Cite this as

DOI:
10.63253/d1i0ax1n
IHP-WINS (2024). Flood Exposure Maps for Buzi-Pungwe-Save (BuPuSa) Transboundary River Basins [Data set]. UNESCO. https://doi.org/10.63253/d1i0ax1n
Published: 2025-08-20 | Publisher: UNESCO

Metadata
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DCAT-AP
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Basic information
DOI https://doi.org/10.63253/d1i0ax1n
Resource type Spatial data set
Date of creation 2025-04-15
Date of last revision 2025-08-20
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Metadata identifier Flood-Exposure-Maps-for-Buzi-Pungwe-Save-(BuPuSa)-Transboundary-River-Basins
Metadata language English
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High-value dataset category
ISO 19115 topic category environment
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Spatial information
INSPIRE identifier
INSPIRE Themes
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Bounding Box
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Temporal extent (Start)
Temporal extent (End)
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Name of the dataset creator (Legacy) IHP-WINS
Name of the dataset maintainer Jorgen Van Der Biest
Identifier of the dataset creator (Legacy)
Email of the dataset creator (Legacy) projas@cazalac.org
Identifier of the dataset maintainer
Email of the dataset maintainer j.van-der-biest@unesco.org
Website of the dataset maintainer