Abstract
This technical note presents the development of a computer-aided design (CAD) and drafting package (DRAINAGE) for medium-sized municipal storm-water drainage systems. The numerical model, which is designed for use on IBM/PC or compatible microcomputers, is written in PASCAL language. The computer package for flow prediction and drainage design applies the Colebrook equation and the rational method to route pipe flows through tree-type drainage networks, automatically adjusting drainage pipe diameters to fulfill flow requirements and backwater effects. The program outputs are written as DXF files, which can be read and displayed readily as drawings of drainage layout plans and longitudinal profiles in an AUTOCAD environment. DRAINAGE replaces the time-consuming conventional method for designing storm-water drainage networks.
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