شبكة التخطيط العمراني بسم الله الرحمن الرحيم
للكاتب
Y. R. Fares
The British University in Egypt, Faculty of Engineering
Sherouk City, Cairo-Ismailia Road, Cairo, Egypt
Abstract
The assessment of the complex hydrological characteristics in the upper Citarum catchment,
West Java, is reported. The effects of population growth and land use changes on the state
water resources and its availability are also included. The validity of rainfall data of the
hydrological system has been statistically checked for trends, independency, and mean and
variance stability. The classic Thiessen Polygon method has been used in estimating the areal
rainfall intensities over the catchment, while storm events with arbitrary return periods have
been derived from the frequency analyses. The Pearson III distribution has been selected to
simulate the rainfall-surface runoff relationship, for giving the most reliable results. The flood
analysis software HEC-1 has been employed to carry out the numerical simulations for a
recorded flood event in 1994. The Cikapundung sub-catchment has been chosen, as a case
study, for calibrating the hydrological simulations. The Soil Conservation Service method has
been used in simulating and calibrating the runoff hydrograph, for various composite curve
number values. Due to the complex features of the catchment, and due to lack of adequate
land use data, extensive field measurement studies are needed for realising sound predictions.