Abstract:
The application of Geographical information system (GIS) and Remote sensing (RS) have
become essential and effective tools in development of drainage pattern of the study area. This
method can be used for the identification of hydrological features and properties of basin. The
topographic map of the study area was scanned and geo-referenced before it was exported into
ArcGIS 10.0 software. The digitized map was edited, and saved as line coverage in ArcGIS
Software. This paper aimed at applying GIS and RS for the development of drainage system for
LAUTECH, Ogbomoso in order to prevent or reduce the persistent occurrence of flood.
Geographical Information System (GIS) and Remote Sensing (RS) techniques were used to
analyse the hydrological drainage basins of the study area. Google Earth and LANDSAT 7
sensor of 2019 ETM+, path 191 and row 55 of VHS were used to acquire the satellite imageries
of the study area. Using high resolution imageries, a Digital Elevation Model (DEM) was
developed with Surfer 8 and ArcGIS 10.0. The drainage, watershed, flow direction, flow length
and flow accumulation maps of the study area were generated by using the Digital Elevation
Model. Result obtained indicated that studied basins exhibits high, medium and low spatial
variations in their hydrological properties. The results revealed that the used of remotely sensed
data and ArcGIS 10.0 software provide an effective approach to develop accurate drainage
pattern with a minimum amount of time, effort, and cost. This approach creates easily read and
accessible techniques that facilitate the identification and development of drainage pattern of the
study area. This study would help the people to utilize the resources for sustainable development
of the basin area. |
