Back
 GEP  Vol.5 No.10 , October 2017
Vulnerability Studies of Sensitive Watershed Areas of Owerri South East Nigeria Using Digital Elevation Models
Abstract: The impact of human activities on sensitive watershed terrains is a critical consideration in the management of urban ecosystems. Degradation of sensitive ecosystem features such as watershed land areas is often irreversible due to the extent and intensity. The vulnerability of 150 m watershed management zone of Otamiri river Owerri Imo State, Nigeria was studied by topographic analysis using 1977 digital elevation model (DEM), 1977 aerial photos, Shuttle Radar Topographic Mission DEM of 2000, 2012 satellite imagery and the 2016 Master Plan of the study area. The impact of human activities in elevation change was observed in the parts of substantial human activities while topographical stability was recorded for areas of very low human activities.
Cite this paper: AC-Chukwuocha, N. , Ngah, S. and Chukwuocha, A. (2017) Vulnerability Studies of Sensitive Watershed Areas of Owerri South East Nigeria Using Digital Elevation Models. Journal of Geoscience and Environment Protection, 5, 1-10. doi: 10.4236/gep.2017.510001.
References

[1]   Revenga, C., Murray, S., Abramovitz, J., and Hammond, A., (1998) Watersheds of the World: Ecological Value and Vulnerability. World Resource Institute, Washington DC.

[2]   Lambin, E.F. and Geist, H.J. (2010) Land Use and Land Cover Change: Local Processes and Global Impacts. IGBP Global Change, The IGBP Series, International Geosphere-Biosphere Program, Human Dimensions Global Environment Change Program. Berlin Heidelberg, Springer.

[3]   Jing, S., Hongwei, L., Yang, Z. and Li, H. (2016) Vulnerability Assessment of Urban Ecosystems Driven by Water Resources, Human Health and Atmospheric Environment. Journal of Hydrology, 536, 456-470.

[4]   Federal Republic of Nigeria (2009) Federal Republic of Nigeria Official Gazette: Supplement to the Gazette, Government Notice No.2. FGP 16122009/10,000(0L020) Federal Government Printer, Abuja, 96.

[5]   Chukwuocha, A.C. and Igbokwe, J.I. (2014) Delineation and Characterization of Sub-Catchments of Owerri, South East Nigeria, Using GIS. American Journal of Geographic Information System, 3, 1-9.

[6]   AC-Chukwuocha, N.B. (2015) Analysis of Structural Changes in Land Use and Land Cover of Otamiri Watershed in Owerri, South East Nigeria. Journal of Environment and Earth Science, 5, 51-59.

[7]   Egboka, B.C., and Uma, K.O. (1985) Water Resources of Owerri and Its Environs, Imo State. Nigeria Journal of Mineral Geology, 22, 57-64.

[8]   Fingerhuth and Partners (1977) Imo State Capital Owerri, Master Plan Report Phase II. Felderggstrasse, Zurich.

 
 
Top