| Summary: | This study describes the physical characteristics of hydroclimate in
Silengkong and Lowereng subwatersheds of Kedung Bulus watershed in the areas
of, Kebumen Regency, Central Java Province. The study aims at understanding
the physical characteristics and hydroclimate for sub watersheds using time series
analysis.
Data were analyzed by applying a statistical method. The primary data
were those on time series of daily rains and discharges. The physical
characteristics of watershed included morphometry, i.e. the area of watershed, the
network of rivers, and elevation. The daily rainfall of watershed were calculated
using an arithmetic mean and a general statistical method. Classification of the
existing climates were analyzed using the Schmidt-Ferguson�s classification
method and the dryness vulnerability value by a dry month. The general statistic
values include maximum value, minimum value, mean, median, mode, standard
deviation (SD), coefficient of variation, and skewness, as well as the parameter of
River Regime Coefficient.
Results of the study show that in view of land covering, climatology, and
hydrology, Silengkong subwatershed of 1.17 km
2
and Lowereng subwatershed of
8.5 km
2
have almost the same climate classification with the different land
covering resulting in the different discharge. The characteristics of discharge over
the year can be variable, depending on rainfall and change in land covering or the
activities taking place in each of the subwatersheds. The results indicate that there
was difference in the physical characteristics of hydroclimates between both subwatersheds
despite in the virtually same rain areas. The results become the early
information in performing the management of watershed.
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