This book deals with the spatial estimation of storm, monthly and annual
precipitation in the Cetina River catchment. The river catchment is a
highland area of about 4140 km2, divided by Dinara Mountain into two
parts. The western part has area of about 1720 km2. It is "direct" or
topographic catchment, almost entirely situated in Croatia, while
climate is under strong influence of the Adriatic Sea (Mediterranean
climate). The eastern part of the catchment (about 2420 km2) is referred
to as the "indirect" catchment. It is mainly situated in Bosnia and
Herzegovina, with a continental climate. Therefore, precipitation regime
is very complex and variable over the catchment area. A few conventional
methods (arithmetic average, inverse square distance method, Thiessen
method, isohyetal method and hypsometric method) were used to calculate
average precipitation of each part of the catchment, while
geostatistical methods (ordinary kriging, universal kriging and kriging
with external drift) were used to calculate precipitation maps and
statistical accuracy.