EJPAU 2006. Barszcz M. , Banasik K. , Tönsmann F. ESTIMATION OF LAG TIMES OF RAINFALL EVENTS FOR THREE SMALL RIVER BASINS

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2006
Volume 9
Issue 2

Topic:

Environmental Development

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Barszcz M. , Banasik K. , Tönsmann F. 2006. ESTIMATION OF LAG TIMES OF RAINFALL EVENTS FOR THREE SMALL RIVER BASINS, EJPAU 9(2), #30.
Available Online: http://www.ejpau.media.pl/volume9/issue2/abs-30.html

ESTIMATION OF LAG TIMES OF RAINFALL EVENTS FOR THREE SMALL RIVER BASINS

Mariusz Barszcz¹, Kazimierz Banasik¹, Frank Tönsmann²
¹ Department of Water Engineering and Environmental Recultivation, Warsaw Agricultural University, Poland
² Department of Hydraulic and Water-Resources Engineering, University of Kassel, Germany

ABSTRACT

Lag time of runoff – Lag is one of the characteristic values in rainfall-runoff modeling and lag time of sediment yield – Lag_S is an important characteristic in the procedure of predicting the suspended sediment rate (sedimentgraph). The relationship between the lag times (Lag_S/Lag) is used for estimating sediment routing coefficient – B, which is a key parameter of the instantaneous unit sedimentgraph (IUSG). The IUSG formula is needed to transform the sediment produced during rainfall into sedimentgraph.

The relationship Lag_S/Lag was examined for a three small basins (two of which are located in Poland, and one in Germany). The ratio Lag_S/Lag, estimated for events from the investigated basins, has been in the range from 0.49 to 1.11. A statistical significant correlation has been found between the value of Lag_S/Lag and rainfall depth in one of the basins.

Key words: small basin, lag time, instantaneous unit sedimentgraph.

Mariusz Barszcz
Department of Water Engineering and Environmental Recultivation,
Warsaw Agricultural University, Poland
Nowoursynowska 159, 02-776 Warsaw, Poland
phone: +22 5935284, +22 5935280
email: barszcz@alpha.sggw.waw.pl

Kazimierz Banasik
Department of Water Engineering and Environmental Recultivation,
Warsaw Agricultural University, Poland
Nowoursynowska 159, 02-776 Warsaw, Poland
phone: +22 5935284, +22 5935280
email: banasik@alpha.sggw.waw.pl

Frank Tönsmann
Department of Hydraulic and Water-Resources Engineering,
University of Kassel, Germany
Kurt Wolters-Strasse 3, 34-109 Kassel, Germany
email: ftoensm@gmx.net

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.