2012.4-2013.3 Yearbook of NILIM
Research Summary


Water Quality Control Department

Reference Number Y120201
Title Research on Application of Stock Management Approach to Sewers
Start-End Date 2010.4-2013.3
Division Wastewater System Division
Author Head, Toshihiro YOKOTA
Senior Researcher, Wataru FUKATANI
Researcher, Masaki SUEHISA
Guest Research Engineer, Masahiro NOZAWA
Summary Japan has invested heavily for the expansion of sewer network since the 1960fs. Aging problems are appearing for the early laid sewers. As a result, annual road cave-in caused by sewer reached to more than 4,000 cases in recent years. Our research developed the methodology for innovate stock management.