Statistical analysis of river characteristics (in Greece): basic hydraulic parameters

Papadimitrakis, IA; Orphanos, I

dc.contributor.author	Papadimitrakis, IA	en
dc.contributor.author	Orphanos, I	en
dc.date.accessioned	2014-03-01T01:58:58Z
dc.date.available	2014-03-01T01:58:58Z
dc.date.issued	2009	en
dc.identifier.issn	0262-6667	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28802
dc.subject	Manning coefficient	en
dc.subject	velocity profiles	en
dc.subject	entropy parameter	en
dc.subject	spatial velocity deviation intensity	en
dc.subject.classification	Water Resources	en
dc.subject.other	OPEN-CHANNEL FLOW	en
dc.subject.other	LONGITUDINAL DISPERSION COEFFICIENT	en
dc.subject.other	VELOCITY DISTRIBUTION	en
dc.subject.other	UNCERTAINTY	en
dc.subject.other	ROUGHNESS	en
dc.subject.other	PROFILES	en
dc.subject.other	MAXIMUM	en
dc.subject.other	ENTROPY	en
dc.title	Statistical analysis of river characteristics (in Greece): basic hydraulic parameters	en
heal.type	journalArticle	en
heal.language	English	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 (n(i)) 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, V-max/V-m, 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 V-m. The similarities among the quantities (u, U, n, V-max/V-m, 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.	en
heal.publisher	IAHS PRESS, INST HYDROLOGY	en
heal.journalName	HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES	en
dc.identifier.isi	ISI:000272747500004	en
dc.identifier.volume	54	en
dc.identifier.issue	6	en
dc.identifier.spage	1035	en
dc.identifier.epage	1052	en