ISSN 1058-3912
Electronic journal of the International Association
for Environmental Hydrology
On the World Wide Web at http://www.hydroweb.com
JEH Volume 6 (1998), Paper 6, June 1998
Posted June 19, 1998
THE PREDICTION OF DAILY OUTFLOW FOR AN UNGAGED MOUNTAINOUS BASIN
Alexander Fedorovski and A. Mezencev
Department of Hydrology, Far Eastern State University, Vladivostok,
Russia
ABSTRACT
To evaluate the daily outflow from a 212-km2 basin in a mountainous
part of the downstream Amur river, which has no rain gages, a modeling
approach is needed. The average basin rainfall during a rainfall period
(RP) and antecedent river discharge are used as model inputs. Estimating
average basin rainfall is described by Fedorovski (this issue) and involves
transfer of rainfall data from two permanent stations located more than
50 km away from the basin. The transformation of rainfall into streamflow
is based on the Generalized Flood Pattern Method (GFPM). During method
development, selected floods are averaged for rainfall durations of 1-6
days and ordinates of unit floods (UFs). It was established that eleven
types (patterns) of generalized UFs exist depending on the rainfall duration
and location of daily rain maximum in the RP. The flood hydrograph is calculated
by multiplying the ordinates of the selected UF by total flood volume,
which is derived from the empirical relationship between total rainfall
and flood volume. The daily outflow is the sum of the flood hydrograph,
flow from the previous flood, and base flow.
Reference: Fedorovski, A. and A. Mezencev; The Prediction
of Daily Outflow for an Ungaged Mountainous Basin, Journal of Environmental
Hydrology, Vol. 6, Paper 6, June 1998.
Alexander Fedorovski
Department of Hydrology
Far Eastern State University
27 Oktabrskaja
690600 Vladivostok
Russia
E-mail : fedor@geo.dvgu.ru