Catchment delineation
Delineated and standardized 20 strategic catchments using DEM-based watershed analysis.
National catchment planning · Nigeria
Development of 20 Strategic Catchment Management Plans for Northern Nigeria
A national-scale programme combining watershed delineation, baseline spatial analysis, field engagement and stakeholder evidence to support integrated management of Northern Nigeria's land and water resources.
Project objective
One consistent planning framework for a vast and varied region.
The assignment delineated 20 strategic catchments, completed integrated baseline studies within each catchment and produced 20 Strategic Catchment Management Plans. The work required consistent national spatial standards while reflecting distinctive environmental, hydrological and socio-economic conditions.
20Strategic catchments
19 + FCTNorthern states and capital territory
20Comprehensive management plans
1Integrated public WebGIS
My contribution
Building the spatial foundation for national-level planning.
My GIS work covered the chain from catchment delineation and baseline evidence to stakeholder-data integration, cartography and final plan production.
Baseline spatial studies
Integrated environmental, hydrological, land-use and socio-spatial datasets for every catchment.
Thematic analysis
Produced maps of topography, drainage, land cover, erosion risk, flood-prone areas and ecological features.
Stakeholder evidence
Analysed consultation data and translated community and institutional priorities into GIS layers.
Plan production
Developed cartographic outputs and spatial datasets used throughout the 20 management plans.
Quality and consistency
Maintained common data structures, spatial standards and cartographic conventions across all catchments.
Spatial workflow
From terrain to a management plan.
- 01Delineate
Use elevation and drainage behaviour to establish strategic catchment boundaries.
- 02Characterise
Assemble evidence on terrain, hydrology, land cover, erosion, flooding, ecology and communities.
- 03Engage
Collect local and institutional knowledge through field visits and consultations.
- 04Integrate
Convert stakeholder inputs and technical findings into spatial priorities and interventions.
- 05Communicate
Produce standardized maps, datasets, plans and an interactive WebGIS.
Project gallery
Spatial evidence strengthened by people and place.
Outputs and value
Twenty plans, one national evidence base.
The programme delivered comprehensive plans supported by standardized geospatial datasets, thematic maps and spatially targeted intervention evidence.
- Twenty strategic catchment boundaries and associated geodatabases
- Baseline and thematic maps for all catchments
- Spatially referenced stakeholder priorities and proposed interventions
- Consistent cartographic products for national reporting
- Interactive WebGIS providing access to catchment maps and planning information
Project attribution: Commissioned by the ACReSAL Federal Project Management Unit and executed by MECON Services Ltd. This case study describes Samuel Bahago Gabriel's contribution within a multidisciplinary team.
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