THE CHALLENGES SEWERAGE SYSTEM IN TOKYO. ・ 1884 Started sewer construction ・ 1995 Accomplished almost 100% coverage in Tokyo 23 wards area In this duration, The implementation of project had been “trial and correct”. THE CHANGE OF SEWERED POPULATION AND WATER QUALITY IN RIVER.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
・1884 Started sewer construction
・1995 Accomplished almost 100%
coverage in Tokyo 23 wards area
In this duration, The implementation of project had been “trial and correct”.
AND WATER QUALITY IN RIVER
・Crisis of epidemic
(caused by insufficient wastewater treatment)
・Deterioration of environment
(air/water pollution etc.)
・Rapid expanding of urban area
(caused by recession, disaster, war etc)
・Difficulties administrative coordination
・Ensure stable finance system
(establish tariff and implementation
collection, introduction of subsidization
from central/local government)
・Review of priority/ commitment of governor
・Ensure legislation/ administrative system
・Project considered cost-reduction
(Especially reconstruction of deteriorated sewer network area)
・The effort for new demand
(high level inundation control, combined sewer overflow control, advanced wastewater treatment etc.)