Abstract :
The purpose of this study is to generate a stream
ow map for the coastal
part of the Eastern Black Sea Region, which is located in the north-east of Turkey. The
topographic structure of the region is an obstacle in terms of the number of observation
gauges. In order to determine spatial variation of
ow and to estimate
ow on any ungauged
points in the region, interpolation between gauged and ungauged points is applicable. For
this purpose, any hydrological models, which depend on large meteorological datasets,
can be used. However, in this study, ordinary and universal kriging as geostatistical
interpolation methods are used to interpolate mean annual
ow depth over the study
area; thus,
ow values on ungauged points can be easily estimated. Kriging methods
are compared with simple regression based on the relationship between
ow data and
basin area. Calibration results of the observed and estimated
ow depths for ordinary and
universal kriging methods are satisfactory; the determination coecients are found to be
0.84 and 0.87, respectively. Besides, the validation results show that the performance of
kriging methods is superior to that of the regression model.
