Abstract:
The wide expansion and accelerated development and grown of Dura city had led to change in the hydrological and geomorphological features and the drainage system had become more complex, hence, the amount of running water has increased, and Dura city has been lied now on more one catchments. At the same time, storm water drainage is not exit and in some streets the water is conveyed to wastewater collection network which unable to meat the present water excess.
The design engineer must conduct the preliminary investigations to develop a layout plan of the sewerage system. Site visits and contacts with the city and local planning agencies and state officials should be made to determine the land use plans, zoning regulations, and probable future changes that may affect both the developed and undeveloped land. Data must be developed on topography, geology, hydrology, climate, ecological elements, and social and economic conditions. Topographic maps with existing and proposed streets provide the most important information for preliminary flow routing
