IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Extreme events, natural variability and climate change : Development and approval of an innovative permeable pavement with high design demands
Development and approval of an innovative permeable pavement with high design demands
many an area of approximately 90 football fields (around 75 hectares) is sealed due to urbanisation. The
environmental consequences of this are significant as the whole water balance can be disrupted because stormwater can
no longer naturally infiltrate into the ground. One of the major consequences of reduced natural infiltration is an increase in
local flooding. The increased volumes of stormwater from urban developments are often simply diverted into existing
stormwater and sewer systems and this frequently exceeds their capacities leading to local flooding. A lack of water for
evaporation can also result in a hotter, drier climate in urban areas. This is known as Urban Heat Island Effect. In addition,
pollutants from traffic and other anthropogenic activities in urban areas can compromise the quality of groundwater and
receiving waters.
This situation is expected to become even more problematic in future due to expected climate change. Research indicates
that the intensity of the summer rainfall in Germany will increase substantially. Sustainable solutions for handling
stormwater that more closely represent the natural water cycle are urgently required. Legislators have also recognized this
situation. While the capacity of existing sewers in Germany can generally manage runoff from rainfall events of up to
approximately 50 mm/h satisfactorily, permeable pavers can easily infiltrate more than 500 mm/h. However, permeable
pavements are not utilised as often as they could be. One potential reason for the low utilisation rate of permeable paving
systems is the stark industrial look that many of the traditional paving systems have. Traditional permeable paving
systems often do not meet the design demands of landscape architects. Many also have important disadvantages like
wide infiltration joints that can cause structural damage to the surface and are not practical for high heels or trolleys.
The paper describes the development of a new permeable interlocking concrete paving system that has a maximum joint
width of between 5 and 6 mm, which is in-line with German building regulations. The new pavers are very flexible and are
not limited by shape, colours or surface finish. An innovative joint filling material was developed which has very high
strength and pollutant removal capacity. The new system exceeds all stormwater treatment and infiltration requirements
for general German technical approval. In addition, the new system has been field tested over a period of three years at
three different sites in Germany and the Netherland. The cleaning process to renew the hydraulic permeability was also
tested and optimized in the field studies. The paper presents results from the laboratory and field tests performed as part
of the German approval process. It also gives recommendations for construction and maintenance of the new system.Form Required :
File Size : 1,188,575 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Extreme events, natural variability and climate change
Date Published : 28/08/2015
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