Design Of Storm water Drainage system For Beit JalaCity

Abstract

The disposal of storm water in streets and roads creates major traffic and

environmental problems .

Sewage facilities in many Palestinian cities do not exist , The storm water has been

seeping into the streets and roads through the overflows causing serious problems .

Beit Jala is such as Bethlehem district cities , do not contains storm water drainage

system . The accelerated development and grow of Beit Jala city has led to change in

the hydrological and geomorphological features . all of the areas of Beit Jala city do

have not a natural drainage outlet . Heavy rainfall causes storm water to collect in

low areas and flood streets and walk way . Rapid growth has decreased the open area

available for percolation and rain water has greatly increased the runoff to low

laying areas .

In view of this prevailing condition , Drainage system in Beit Jala city would have a new characteristic and development of storm water drainage system is very necessary to drain excess water from streets .

In this project a trial was made to design a storm water drainage system for Beit Jala city, and we find that the drainage system must contain four main and six submain lines as main trunks that make drainage for water in the rain fall events . These main trunks cover a large percentage area of Beit Jala . And they ara efficient in minimizing traffic problems .