Title page for ETD etd-06112009-063741

Type of Document

Master's Thesis

Author

Agbenowosi, Newland Komia

URN

etd-06112009-063741

Title

GIS based optimal design of sewer networks and pump stations

Degree

Master of Science

Department

Civil Engineering

Advisory Committee

Advisor Name	Title
Loganathan, G. V.	Committee Chair
Greene, Richard G.	Committee Co-Chair
Kibler, David F.	Committee Member

Keywords

water flow
least cost path

Date of Defense

1995-11-08

Availability

restricted

Abstract

In the planning and design of sewer networks, most of the decisions are spatially dependent because of the right of way considerations and the desire to have flow by gravity. This research addresses the application of combined optimization-geographic information system (GIS) technology in the design process. The program developed for the design uses selected manhole locations to generate the candidate potential sewer networks. The design area is delineated into subwatersheds for determining the locations for lift stations when gravity flow is not possible. Flows from upstream subwatersheds are transported to the downstream subwatersheds via a force main. The path and destination of each force main in the system is determined by applying the Dijkstra's shortest path algorithm to select the least cost path from a set of potential paths. This method seeks to minimize the total dynamic head. A modified length is used to represent the length of each link or force main segment. The modified length is the physical length of the link (representing the friction loss) plus an equivalent length (representing the static head). The least cost path for the force main is the path with the least total modified length. The design approach is applied to two areas in the town of Blacksburg, Virginia. The resulting network and the force main paths are discussed.

Files

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