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Contribution of GIS to Hydromorphometric Characterization of the nkoup Watershed(nun Plain-Cameroon)

Advances in Geological and Geotechnical Engineering Research 2023年第3期5卷 1-15页

作者： Paul Bertrand Tsopkeng Josiane Feugue Kenfack David Guimolaire nkouathio Charles Antoine Basseka leonel Koudjou Tsague Postgraduate School for Pure and Applied Sciences The University of DoualaP.O.Box 2701DoualaCameroon Department of Geography Faculty of Letters and Human SciencesP.O.Box 49The University of DschangCameroon Department of Earth Sciences Faculty of SciencesP.O.Box 67The University of DschangDschangCameroon Department of Hydraulics and Water Management National Advanced School of Engineering of MarouaThe University of MarouaP.O.Box 46MarouaCameroon

The nkoup watershed(10°35’-10°47’E and 5°27’-5°42’n)is a volcanic zone situated in nun Plain West Came*** high fertility of the soils makes it a strategic agropastoral area where water resources are heavily exploited and used for several *** to human activities,soils and water resources are deteriorating,giving birth to water pollution and hydromorphological *** work aims to determine the hydromorphometric parameters of the nkoup watershed so that the data obtained help in the sustainable management of water resources and conservation of *** achieve this aim,various data were collected from DEM dataset derived from SRTM and processed in specialized software(QGIS and ArGIS).The simplified hydrological balance was calculated using the upstream *** nkoup watershed has:Axial length L_(ax)=25.8 km,Axial Width W_(ax)=11.1 km,Perimeter P=132.6 km,Area A=173.7 km^(2),Average Altitude Ha=1726.3 m,Compactness Index Icomp=2.8,Relief ratio Rr=3.9 m/km,Circularity ratio Rc=0.1,Elongation ratio R=0.1,Drainage texture ratio Rt=0.6,Drainage density Dd=0.5 km/km^(2).Stream Frequency Fs=0.4,Channel Sinuosity Index CSI=0.8,Stream gradient Sg=0.6 and global slope Index Ig=6.8 m/*** specific height Difference Ds=89.4 m shows moderate *** precipitation and evapotranspiration are unevenly *** P=187.7 mm/an,ETP=953.4 mm/an,Q=4.2 m3/s,R=762.5 mm/an,ETR=832.3 mm/an and I=282.9 mm/*** nkoup,36.9 km long,has a sinuous aspect due to the low slope and the high *** piezometric levels vary according to the seasons and the groundwater flow follows the n-S direction as surface flow.

关键词： nkoup watershed Water resources Hydromorphometric parameters Hydrological balance Groundwater flows direction

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