DBPapers
DOI: 10.5593/sgem2011/s13.117

IDENTIFICATION OF HOMOGENEOUS REGIONS FOR RUNOFF ESTIMATION IN UNGAUGED BASINS

AUTHOR/S: B. BLAGOJEVIC, J. PLAVSIC, V. RISTIC-VAKANJAC
Monday 1 August 2011 by Libadmin2011

11th International Multidisciplinary Scientific GeoConference SGEM2011, www.sgem.org, SGEM2011 Conference Proceedings/ ISSN 1314-2704, June 20-25, 2011, Vol. 2, 887-894 pp

ABSTRACT

This paper addresses the problem of defining appropriate characteristic which leads to
homogeneous regions identification, required for application of multiple nonlinear
regression methodology for interpolation of hydrologic data from gauged to ungauged
basins.

The underlying methodology of multiple nonlinear regression is based on theory of
standardization and normalization of correlation. In order to obtain synthetic runoff
series at ungauged basins, one of the key steps is estimation of spatial correlation
function. There are theoretical and empirical correlation functions. While empirical
correlation function is estimated according to correlation coefficients of runoff series at
gauged basins and their mutual distance, its pair - theoretical correlation function is
merely a shift of empirical correlation function. This shift is made to achieve correlation
coefficient of one for zero distance. However, this shift is acceptable only if performed
in homogeneous region comprising of basins which behave in a hydrologically similar
way.

A basin characteristic that describes hydrological behavior similarity is
examined
among morphologic characteristic, basin proximity, and runoff time series statistics.
There are two criteria for homogeneity control. They refer to empirical and theoretical
spatial correlation function, and eventually identify donor catchments for ungauged
basin.

Study area for research is the territory of Republic of Serbia without provinces of
Vojvodina and Kosovo. Basins up to area of 1000 km2 are taken into consideration.
Within the period 1961-2005, three sub-periods of 15 years each are examined for mean
monthly runoff time series simulation potential at ungauged basins.

Keywords: ungauged basins, regionalization, mean monthly runoff

PAPER 2011/s13.117: IDENTIFICATION OF HOMOGENEOUS REGIONS FOR RUNOFF ESTIMATION IN UNGAUGED BASINS

30 EURO ADD TO CART


Your cart ( items)

Subtotal:
Tax cost ():
Shipping cost:
Total:
Checkout Empty