THE ZURICH STREAM DAY-LIGHTING PROGRAM

摘要

In the concept of separating clear extraneous water from the sewer system, the Zurich day-lighting program plays an important role. The objective of avoiding diversion of stream water into the sewers led to the idea of reopening and revitalising brooks and streams and using them as a part of the separate clean water system. This concept provides a solution to the problem faced by many communities, as the traditional way of coping with stream water and wastewater was to amalgamate them into the sewer system. As towns grow, the disposal of wastewater becomes a larger problem and the treatment of sewage requires economic considerations. When all the extraneous water like stream water, infiltration water from house drains, water from fountains and cooling devices is fed into the sewage system, there will be problems. The obvious solution is to separate the clean water at the source, so that the sewage treatment plants have to process only sewage. Thus, reopening (day-lighting) streams as a part of the separate system for clean water is an ideal solution from the economic, ecological and aesthetic points of view. The Zurich stream day-lighting concept also encompasses the streams, which have been drained into sewer pipes. Historically, this was the way to deal with small streams in urban areas. The day-lighting of brooks and streams is also an attractive alternative enhancing the urban landscape.