Temporal and spatial scales of lake processes. Part 1: Physical and ecological scales, non-dimensional parameters and flow regimes

Papadimitrakis, I

dc.contributor.author	Papadimitrakis, I	en
dc.date.accessioned	2014-03-01T02:04:11Z
dc.date.available	2014-03-01T02:04:11Z
dc.date.issued	2011	en
dc.identifier.issn	11084006	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29403
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-84858598412&partnerID=40&md5=b05a99abc958e5e4074bc08b39ea2e6c	en
dc.subject	Dimensionless numbers	en
dc.subject	Dynamical regimes	en
dc.subject	Hierarchy of scales	en
dc.subject	Lake processes	en
dc.subject	Length scales	en
dc.subject	Mixing	en
dc.subject	Time scales	en
dc.subject	Transport	en
dc.title	Temporal and spatial scales of lake processes. Part 1: Physical and ecological scales, non-dimensional parameters and flow regimes	en
heal.type	journalArticle	en
heal.publicationDate	2011	en
heal.abstract	Scaling concepts, related to basic physical transport and mixing processes and other ecological aspects in lakes, are reviewed in an ecohydrodynamic perspective; the length and time scales as well as the non-dimensional parameters governing the various flow regimes and relevant to these processes are also presented, emphasizing the influence they have on lake ecosystems. The hierarchy of length scales is very important in determining both the turbulence structure, and in affecting the ecological processes occurring in lakes. Most of these scales are defined in terms of several basic parameters which, when combined properly, yield important dimensionless numbers, as: Rf, Ri, Pr, T, Ret, Frt, Grt, and Prt, the flux and gradient Richardson numbers, the Prandtl number, a dimensionless time, and the turbulent Reynolds, Froude, Grasshof and Prandtl numbers, respectively. A few more dimensionless numbers (as the Lake and Wedderburn numbers, LN, W, etc.) are also useful in characterizing the general dynamic behavior of lakes. Ratios of length or time scales may also provide similar useful parameters. © 2011 Global NEST Printed in Greece. All rights reserved.	en
heal.journalName	Global Nest Journal	en
dc.identifier.volume	13	en
dc.identifier.issue	4	en
dc.identifier.spage	339	en
dc.identifier.epage	353	en