Universal Journal of Geoscience Vol. 3(1), pp. 13 - 27
DOI: 10.13189/ujg.2015.030102
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Morphometric Characteristics and the Relation of Stream Orders to Hydraulic Parameters of River Goro: An Ephemeral River in Dire-dawa, Ethiopia


Girma Moges *, Vijaya Bhole
University College of Sciences, Department of Geography and Geo-informatics, Osmania University, India

ABSTRACT

Major morphometric parameters of Goro watershed were derived from Aster Global Digital Elevation Model (GDEM) using ArcGIS10.1 extension, Arc Hydro Tool 2.0 in order to characterize it quantitatively. The study also assessed the relation of stream orders to selected channel hydraulic parameters (width, depth, channel bed slope, velocity and discharge) at bankfull flow condition. Channel geometry data and grain size samples collected from 14 representative cross-sections used as input to compute hydraulic parameters using equations appropriate for ungauged streams. The analysis of morphometric parameters indicate that pattern of stream networks is less controlled by structural condition though the area is situated in the rim of the great east African rift valley; and its geomorphic development is at late youth stage. Though hydraulic components of the channel do have a positive relation with stream orders, only channel cross-section area and discharge well related to stream orders [each increased at the rate of 0.86 and 1 on average with R2 of 0.92 and 0.8 respectively with increasing in stream orders]. However, depth, velocity and bed slope of the channel are less explained by stream order, which may indicate us these hydraulic parameters are rather affected by other local channel factors.

KEYWORDS
Ephemeral Stream, River Goro, Morphometric Parameters, Hydraulic Parameters, GIS

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Girma Moges , Vijaya Bhole , "Morphometric Characteristics and the Relation of Stream Orders to Hydraulic Parameters of River Goro: An Ephemeral River in Dire-dawa, Ethiopia," Universal Journal of Geoscience, Vol. 3, No. 1, pp. 13 - 27, 2015. DOI: 10.13189/ujg.2015.030102.

(b). APA Format:
Girma Moges , Vijaya Bhole (2015). Morphometric Characteristics and the Relation of Stream Orders to Hydraulic Parameters of River Goro: An Ephemeral River in Dire-dawa, Ethiopia. Universal Journal of Geoscience, 3(1), 13 - 27. DOI: 10.13189/ujg.2015.030102.