Statistical analysis of river characteristics (in Greece): Basic hydraulic parameters [Analyse statistique de caractéristiques de rivières (en Grèce): Paramètres hydrauliques de base]

Papadimitrakis, IA; Orphanos, I

dc.contributor.author	Papadimitrakis, IA	en
dc.contributor.author	Orphanos, I	en
dc.date.accessioned	2014-03-01T01:58:49Z
dc.date.available	2014-03-01T01:58:49Z
dc.date.issued	2009	en
dc.identifier.issn	02626667	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28741
dc.subject	Entropy parameter	en
dc.subject	Manning coefficient	en
dc.subject	Patial velocity deviation intensity	en
dc.subject	Velocity profiles	en
dc.subject.other	Bottom roughness	en
dc.subject.other	Flow kinematics	en
dc.subject.other	Horizontal velocity	en
dc.subject.other	Hydraulic parameters	en
dc.subject.other	Local roughness	en
dc.subject.other	Longitudinal velocity	en
dc.subject.other	Manning coefficient	en
dc.subject.other	Natural streams	en
dc.subject.other	River flow	en
dc.subject.other	Statistical analysis	en
dc.subject.other	Transverse profile	en
dc.subject.other	Velocity deviation	en
dc.subject.other	Velocity profiles	en
dc.subject.other	Vertical profile	en
dc.subject.other	Wetted perimeters	en
dc.subject.other	Aspect ratio	en
dc.subject.other	Boundary layer flow	en
dc.subject.other	Entropy	en
dc.subject.other	Hydraulics	en
dc.subject.other	Open channel flow	en
dc.subject.other	Rivers	en
dc.subject.other	Stream flow	en
dc.subject.other	Velocity	en
dc.subject.other	entropy	en
dc.subject.other	hydraulic structure	en
dc.subject.other	river flow	en
dc.subject.other	statistical analysis	en
dc.subject.other	stream	en
dc.subject.other	velocity profile	en
dc.subject.other	Greece	en
dc.title	Statistical analysis of river characteristics (in Greece): Basic hydraulic parameters [Analyse statistique de caractéristiques de rivières (en Grèce): Paramètres hydrauliques de base]	en
heal.type	journalArticle	en
heal.identifier.primary	10.1623/hysj.54.6.1035	en
heal.identifier.secondary	http://dx.doi.org/10.1623/hysj.54.6.1035	en
heal.publicationDate	2009	en
heal.abstract	A detailed investigation of the behaviour of various hydraulic parameters, using data from rivers in Greece, was conducted in order to explore the universality of features that many natural streams are believed to have in common. Analysis of vertical profiles of temporal mean of horizontal velocities (u) in the longitudinal (river flow) direction and of transverse profiles of depth-mean longitudinal velocities (U) estimated from these vertical profiles, measured at 232 cross-sections of several rivers in Greece, provided valuable information: on the distribution of local roughness coefficients (ni) along the wetted perimeter of the cross-sections examined; on the shape of u profiles; on the ratio of maximum to mean cross-sectional velocity, Vmax/Vm, and its relation to a dimensionless entropy parameter, M; on the shape of U profiles; and on the normalized intensity, r, of the spatial departure of u velocities from Vm. The similarities among the quantities (u, U, n, Vmax/Vm, M, r) analysed in this study and in pertinent literature reveal that the rivers examined exhibit many of the basic features, of rather universal character, shown by other rivers (all over the world) having different geometric and/or other characteristics (aspect ratios, bottom roughness, flow kinematics, etc.). Corresponding differences are also described and explained. Copyright © 2009 IAHS Press.	en
heal.journalName	Hydrological Sciences Journal	en
dc.identifier.doi	10.1623/hysj.54.6.1035	en
dc.identifier.volume	54	en
dc.identifier.issue	6	en
dc.identifier.spage	1035	en
dc.identifier.epage	1052	en