<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Influence of the pattern of effective rainfall on modeled hydrograph was investigated in the study. The modelling was performed with the U.S. Army Corps of Engineers hydrograph package HEC-HMS 3.2 and calibrated and validated on measured hydrographs of Glinscica watershed. Six different models of rainfall loss were applied and their effect on modeled hydrograph was evaluated. Peak discharge, time of peak discharge and runoff volume were compared. The best results with the lowest RMSE in the study was obtained with the SCS curve number loss method. Also synthetic hyetographs of different probability and duration were used. Three positions of the maximum rainfall intensity at 25, 50 and 75 % of the rainfall duration were applied. The results showed essential differences in simulated time to peak and also differences in peak discharge. The differences in time to peak increases considerably with the increasing of the rainfall duration. Finally, the results of constant intensity distribution of rainfall of different durations were compared with those obtained with typical rainfall distribution with the position of the maximum intensity at 50 %. Results showed considerable differences in peak discharge and time to peak by longer durations of the rainfall.</p></abstract>

Influence of the pattern of effective rainfall on modeled hydrograph was investigated in the study. The modelling was performed with the U.S. Army Corps of Engineers hydrograph package HEC-HMS 3.2 and calibrated and validated on measured hydrographs of Glinscica watershed. Six different models of rainfall loss were applied and their effect on modeled hydrograph was evaluated. Peak discharge, time of peak discharge and runoff volume were compared. The best results with the lowest RMSE in the study was obtained with the SCS curve number loss method. Also synthetic hyetographs of different probability and duration were used. Three positions of the maximum rainfall intensity at 25, 50 and 75 % of the rainfall duration were applied. The results showed essential differences in simulated time to peak and also differences in peak discharge. The differences in time to peak increases considerably with the increasing of the rainfall duration. Finally, the results of constant intensity distribution of rainfall of different durations were compared with those obtained with typical rainfall distribution with the position of the maximum intensity at 50 %. Results showed considerable differences in peak discharge and time to peak by longer durations of the rainfall.

The influence of effective rainfall on modeled runoff hydrograph

Faculty of Civil and Geodetic Engineering, University of Ljubljana, Ljubljana, Slovenia

Journal of Hydrology and Hydromechanics

{"article-title":"The influence of effective rainfall on modeled runoff hydrograph"}

Influence of the pattern of effective rainfall on modeled hydrograph was investigated in the study. The modelling was performed with the U.S. Army Corps of...

The influence of effective rainfall on modeled runoff hydrograph

Pubblicato online: 16 giu 2010

Pagine: 3 - 14

DOI: https://doi.org/10.2478/v10098-010-0001-5

Parole chiave
model odtoku, časová závislosť rozdelenia intenzít zrážok, čas maximálnej intenzity zrážky, závislosť zrážka-odtok, syntetický hyetograf, HEC-HMS

This content is open access.

The influence of effective rainfall on modeled runoff hydrograph

Pubblicato online: 16 giu 2010

Pagine: 3 - 14

DOI: https://doi.org/10.2478/v10098-010-0001-5

Parole chiavemodel odtoku, časová závislosť rozdelenia intenzít zrážok, čas maximálnej intenzity zrážky, závislosť zrážka-odtok, syntetický hyetograf, HEC-HMS

This content is open access.

Parole chiave
model odtoku, časová závislosť rozdelenia intenzít zrážok, čas maximálnej intenzity zrážky, závislosť zrážka-odtok, syntetický hyetograf, HEC-HMS