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001-es BibID:	BIBFORM100572
035-os BibID:	(cikkazonosító)106595 (WoS)000795478200006 (Scopus)85125700589
Első szerző:	Pregun Csaba (ökológus)
Cím:	Dynamics of Self-Regulatory Processes in a Lowland River Due to Seasonal Changes in Certain Hydro-Ecological and Water Quality Factors / Pregun Csaba Zsolt
Dátum:	2022
ISSN:	0925-8574
Megjegyzések:	Abstract: This study establishes an evaluable system of relationships among the hydromorphological and water quality factors of a temperate, lowland, regulated watercourse. The aim is to investigate the effects of the environmental factors that cause temporal changes in planktonic algal communities. Measured, real-time and modelled water quality and hydrological data sets were compared during the analysis. It is observed that the same factor can have both positive and negative effects in different periods. Different physiological and morphological characteristics determine environmental tolerance. Chlorophytes, which utilize the red light living in the upper layer, closely correlate with water mirror width (top width). Diatoms need dissolved and suspended silicon and are therefore related to the factors that cause sediment mixing and increased salinity (EC). Cyanobacteria and dinophytes are also able to utilize organic matter (mixotrophy and heterotrophic photosynthesis, respectively). They multiply easily when the organic nutrients that are abundant. In the absence of inorganic nitrogen compounds, cyanobacteria are preferred because of their ability to directly or indirectly take up the N2 molecule. Hydraulic changes have a significant impact on water quality and life processes, including biodiversity.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk hydroecological relationship river geomorphology hydraulics Reynolds & Froude number water quality factors planktonic algae
Megjelenés:	Ecological Engineering. - 178 (2022), p. 1-20. -
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat Szerző által megadott URL DOI
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001-es BibID:	BIBFORM064990
Első szerző:	Pregun Csaba (ökológus)
Cím:	Ecohydrological and morphological relationships of a regulated lowland river; based on field studies and hydrological modeling / Pregun Csaba Zsolt
Dátum:	2016
ISSN:	0925-8574
Megjegyzések:	The planning of the correct channel reconstruction is a priority in the rehabilitation of regulated surfacestreams. The present study examines the most important morphological and ecohydrological factors ofa highly modified watercourse. A comparative analysis was performed among modelled and measuredmorphological, river geometrical, hydraulic, and vegetation status indicators. Reduction of data redun-dancy and examination of the relationships was done by factor analysis. This was found during the datareduction to six or seven attributes (component) and it was sufficient for imaging the original informa-tion content. There are mathematically derived hydrological background variables that are extremelysignificant in characterizing the watercourses, for example; the Reynolds number, Froude number, ratioof slope Froude-number, speed-to-depth ratio, depth-to-width ratio, etc. The partially regulated and arti-ficial river sections were numerically separated from each other in the analysis. The functional aquaticplant habitats and Manning's n Roughness have got a higher factor weight in the less regulated riversection, than in artificial stage. The weakest factor weights were those status indicators which weremost changed by the regulations. The results provide support for defining and monitoring the requiredenvironmental geometric riverbed interventions.
Tárgyszavak:	Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban River restoration River classification Fluvial geomorphological Hydraulical and hydroecological factors River modelling redundancy and data reduction Multivariate analysis
Megjelenés:	Ecological Engineering. - 94 (2016), p. 608-616. -
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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Saját polcon: