Application of Geospatial Technology in Watershed Delineation and Extraction of Hydrologic Characteristics in Opa Catchment,  Southwestern Nigeria

Maruf Orewole; Ayorinde Kappo; Ibrahim Isa; Samuel Fatile; Isiaka Lukman; Abayomi Alaga

doi:10.9734/JGEESI/2016/29267

Research Article Open access CC BY 4.0

Application of Geospatial Technology in Watershed Delineation and Extraction of Hydrologic Characteristics in Opa Catchment, Southwestern Nigeria

Maruf Orewole, Ayorinde Kappo, Ibrahim Isa, Samuel Fatile, Isiaka Lukman, Abayomi Alaga

Journal of Geography, Environment and Earth Science International · pp. 1–9 · Published 28 Oct 2016

10.9734/JGEESI/2016/29267

Abstract

This study explored the opportunity offered by geospatial technology to delineate the watershed draining surface water into Opa River, Southwest Nigeria and its tributaries using a selected outlet downstream of Opa reservoir and then carried out extraction of hydrologic characteristics of the watershed. The automated delineation procedure of ArcHydro extension of ArcGIS software was used. The watershed delineated has coverage of 197.21 km2 and 17 sub-watersheds. Hydrologic Engineering Centre-Geospatial Hydrologic Modelling Extension (HEC-GeoHMS) was used to extract the hydrologic characteristic of the sub-watershed such as area, basin slope, river slope, centroid elevation and longest flow length. The division of the catchment into sub-watersheds enables matching the characteristics of each unit with soil and and land use characteristics thereby making watershed management at micro scale easier.

Automated delineation land use hydrologic watershed

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Maruf Orewole, Ayorinde Kappo, Ibrahim Isa, Samuel Fatile, Isiaka Lukman, Abayomi Alaga (2016). Application of Geospatial Technology in Watershed Delineation and Extraction of Hydrologic Characteristics in Opa Catchment, Southwestern Nigeria. Journal of Geography, Environment and Earth Science International , 1–9. https://doi.org/10.9734/JGEESI/2016/29267

Affiliations

Maruf Orewole — National Center for Technology Management (NACETEM), Federal Ministry of Science and Technology, Obafemi Awolowo University, Ile-Ife, Nigeria
Ayorinde Kappo — Cooperative Information Network, National Space Research and Development Agency, Mathematics Building, Obafemi Awolowo University, Ile-Ife, Nigeria
Ibrahim Isa — Cooperative Information Network, National Space Research and Development Agency, Mathematics Building, Obafemi Awolowo University, Ile-Ife, Nigeria
Samuel Fatile — African Regional Centre for Space Science and Technology Education in English, Mathematics Building, Obafemi Awolowo University, Ile-Ife, Nigeria
Isiaka Lukman — African Regional Centre for Space Science and Technology Education in English, Mathematics Building, Obafemi Awolowo University, Ile-Ife, Nigeria
Abayomi Alaga — Cooperative Information Network, National Space Research and Development Agency, Mathematics Building, Obafemi Awolowo University, Ile-Ife, Nigeria

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