<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The prioritisation of catchments, particularly in the context of catchment plans and management programmes, is part of water resources development. In fact, morphometric analysis assisted by geospatial technology is carried out by prioritising sub-catchments according to their natural resource availability characteristics. Information on the geomorphology and erosion factors of the study area is used in the area in the preparation of local models of ungauged sub-catchments, which otherwise lack an adequate hydrological database. The objective of this paper is to use geographic information systems (GISs) in morphometric analysis to prioritise sub-catchments of the Soungrougrou (a tributary of the Casamance River). In this respect, the integrated methodology involving morphometric aspects from geospatial technology is used. To carry out the geospatial research, basic mathematical equations used in a GIS environment were used to measure a series of aspects of hydrology such as flow length, flow length ratio, bifurcation ratio, drainage density, drainage texture, flow frequency, elongation rate, circularity ratio, form factor, relief and relief ratio. The results divided the whole catchment into three priority areas, namely high, medium and low. The results are relevant for establishing soil and water conservation plans in the Soungrougrou basin, as well as adequate groundwater production and management. The high category (sub-basins 6, 8, 14, 17 and 18) is subject to maximum soil erosion, which requires immediate intervention to avoid possible natural hazards.</p>
</abstract>

The prioritisation of catchments, particularly in the context of catchment plans and management programmes, is part of water resources development. In fact, morphometric analysis assisted by geospatial technology is carried out by prioritising sub-catchments according to their natural resource availability characteristics. Information on the geomorphology and erosion factors of the study area is used in the area in the preparation of local models of ungauged sub-catchments, which otherwise lack an adequate hydrological database. The objective of this paper is to use geographic information systems (GISs) in morphometric analysis to prioritise sub-catchments of the Soungrougrou (a tributary of the Casamance River). In this respect, the integrated methodology involving morphometric aspects from geospatial technology is used. To carry out the geospatial research, basic mathematical equations used in a GIS environment were used to measure a series of aspects of hydrology such as flow length, flow length ratio, bifurcation ratio, drainage density, drainage texture, flow frequency, elongation rate, circularity ratio, form factor, relief and relief ratio. The results divided the whole catchment into three priority areas, namely high, medium and low. The results are relevant for establishing soil and water conservation plans in the Soungrougrou basin, as well as adequate groundwater production and management. The high category (sub-basins 6, 8, 14, 17 and 18) is subject to maximum soil erosion, which requires immediate intervention to avoid possible natural hazards.

Use of Geospatial Tools in Morphometric Analysis and Prioritisation of Sub-catchments of the Soungrougrou (Casamance Basin)

Department of Geography, U.F.R. Sciences and Technologies

Centre de formation continue, Faculté des Sciences et Techniques

Quaestiones Geographicae

This work is licensed under the Creative Commons Attribution 4.0 International License.

The prioritisation of catchments, particularly in the context of catchment plans and management programmes, is part of water resources development. In fact,...

Use of Geospatial Tools in Morphometric Analysis and Prioritisation of Sub-catchments of the Soungrougrou (Casamance Basin)

Publié en ligne: 30 sept. 2021

Pages: 65 - 84

Reçu: 22 mai 2021

DOI: https://doi.org/10.2478/quageo-2021-0024

Mots clés
DEM, morphometric aspects, prioritisation, erosion, Soungrougrou basin

© 2021 Cheikh Faye et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Use of Geospatial Tools in Morphometric Analysis and Prioritisation of Sub-catchments of the Soungrougrou (Casamance Basin)

Publié en ligne: 30 sept. 2021

Pages: 65 - 84

Reçu: 22 mai 2021

DOI: https://doi.org/10.2478/quageo-2021-0024

Mots clésDEM, morphometric aspects, prioritisation, erosion, Soungrougrou basin

© 2021 Cheikh Faye et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Mots clés
DEM, morphometric aspects, prioritisation, erosion, Soungrougrou basin