Title

Belet Weyne District Suitable Potential Higher Grounds for Evacuation During...

License

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Abstract

Datasets used for the analysis are :- Flood Extent, Elevation, Slope, Topographic Wetness Index (TWI),Drainage Density, Strategic Boreholes, Settlements, Land Cover and Roads
Based on a predefined criteria, each of these datasets were first clipped to areas outside the flood extent but within a maximum distance of 10 Km from the flood extent boundary. The outputs were then reclassified into two classes namely; Suitable and Not Suitable. Using an iterative approach, each of these datasets was used to assign a weight to the suitability of a site. These weights are indicated on table 2 below. Thereafter, a multi-criteria evaluation weighted overlay operation was undertaken to determine the potential areas for evacuation sites. An area was then computed for the potential sites and their distance from the flood extent established.
The output was then post – processed to remove invalid geometries and each site was ranked based on the distance from the flood prone area. Sites that are closer in distance were deemed to be most suitable hence a higher rank.
The final layer was then visually checked based on the density of the topographic Wetness Index (TWI) which is based on runoffs during floods. Areas with dense TWI were eliminated to remain with only continuous areas.

Publication Date

Sept. 21, 2023, 2:47 p.m.

Type

Vector Data

Keywords

beletweyne , elnino , evacuation , floods , grounds , higher , somalia

Regions

Somalia

Owner

admin

Group

Water Resources

More info

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Language

English

Supplemental Information

No information provided

Spatial Representation Type

vector data is used to represent geographic data

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