Newsletter and Technical Publications
Freshwater Management Series No. 10
Managing Urban Sewage
An Introductory Guide for Decision-makers
VI. Information Systems
Information systems and other knowledge management tools can help improve the efficiency
and reliability of urban sewage infrastructure. Some examples are described below.
A. Rainfall Information Systems
Some cities have established rainfall information systems to protect residents from floods.
These systems are based upon the electric waves emitted from radar and reflected by raindrops
and identify areas of rainfall and intensity. This information is then sent to pumping stations,
sewage system maintenance offices and treatment plants to allow adequate time for staff to
prepare and to ensure immediate pump operation. Data can also be collected and processed
at a central information processing facility.
B. Sewage Mapping and Data Management Systems
It is also important to obtain accurate information on sewage facilities in order to maintain
and manage them effectively. In Tokyo, a sewage mapping and information system, SEMIS,
was installed in April 1986. SEMIS has allowed Tokyo to systematize its sewage facility
information and create a database for operational purposes.