@article{MAKHILLOJES20126225423,
    title = {Digital Elevation Models as a Tool for Monitoring and Evaluating Gully Development 
  in a Humid Tropical Environment},
    journal = {Online Journal of Earth Sciences},
    volume = {6},
    number = {2},
    pages = {6-14},
    year = {2012},
    issn = {1991-7708},
    doi = {ojesci.2012.6.14},
    url = {https://makhillpublications.co/view-article.php?issn=1991-7708&doi=ojesci.2012.6.14},
    author = {Charles and},
    keywords = {DEMs,gully erosion,Iba Oku Basin,runoff and coastal plains sands,GIS,Nigeria},
    abstract = {Gully erosion is a serious geo-environmental issue causing land degradation in different parts of South Eastern Nigeria. In this study, DEMs were generated at different spatial scales viz; Order-3 Basin, Order-1 and Dominic Utuk Avenue gully sub-catchment in Uyo area of Akwa Ibom State, South Eastern Nigeria. The study was conducted to achieve the following objectives viz; generate the geospatial database applying the principles of Geographic Information System (GIS) and field measurements, conduct catchment analysis; specifically erosion estimation studies, employ GIS in mapping the entire catchment area vis-a-vis erosion prone areas and compute the maximum discharge in the sub-catchment area to aid in the design of erosion control structures. The results obtained, i.e., 78.9 m<SUP>3</SUP> sec<SUP>-1</SUP> pre-supposes that a rainfall event that lasts for an hour will generate a maximum discharge of 111.127 m<SUP>3</SUP> sec<SUP>-1</SUP> into the gully complex; while, a rainstorms of 3 h duration will generate a maximum discharge of 333.38 m<SUP>3</SUP> sec<SUP>-1</SUP> into the gully system. The results of the research has implications for gully erosion stabilization/control in the study area.}
    }