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1、1,Pervious Pavement,“We cant solve problems by using the same kind of thinking we used when we created them. Albert Einstein. Pervious Pavements are a different way of thinking about roads.,John Harrison, B.Sc. B.Ec. FCPA,2,What Is Pervious Pavement?,Pervious pavement is a permeable pavement surface
2、 with a stone reservoir underneath.The reservoir temporarily stores surface runoff before infiltrating it into the subsoil or sub-surface drainage and in the process improves the water quality.Permeable materials such as ancient lime mortars and pervious pavements are made using relatively mono grad
3、ed materials.Pervious pavements allow the earth to breathe, take in water and be healthy. The stone and soil under them acts as a reservoir and cleans the water just like the filter on a fish tank.Pervious pavements are safer to drive on as they do not develop puddles, have a good surface to gripSub
4、divisions made with pervious pavement that also have street trees can be several degrees cooler than surrounding suburbs without.,3,The Water Cycle,The water or hydrological cycle is powered by the sun and water changes state and is stored as it moves through it.,Human intervention is reducing the t
5、ime it takes for water to return to the oceans resulting in less moisture on land, salinity and aridity.,Source:Illustration by John M. Evans USGS, Colorado District (http:/ga.water.usgs.gov/edu/watercyclegraphichi.html),4,Australia Before Settlement,In years gone by grassland and forest covered the
6、 land,5,Our Legacy,In years gone by forests and grassland covered most of our planet.When it rained much of the water naturally percolated though soils that performed vital functions ofslowing down the rate of transport to rivers and streams,purifying the water andreplenishing natural aquifers.Our l
7、egacy has been to pave this natural bio filter, redirecting the water that fell as rain as quickly as possible to the sea.Given global water shortages, problems with salinity, pollution, volume and rate of flow of runoff we need to change our practices so as to mimic the way it was for so many milli
8、ons of years before we started making so many changes.The key to survival in the future will be learning from nature and mimicking her subtle processes. Road are the arteries, veins and lymphatic system to cities.This presentation focuses on where we have gone wrong with roads and the radical TecEco
9、 Permecocrete solution.,6,Australia with a Little Lateral Thinking & Effort,Less paper. Other Cl free processes - no salinity,Evolution away from using trees paperless office,Organic farming Carbon returned to soils.,Cows CSIO anti methane bred,Vehicles more efficient and using fuel cells,Pervious p
10、avements prevent immediate and polluted run-off. Carbon dioxide and other gases absorbed by TecEco Eco- Cements. Sewerage converted to fertilizer and returned to soils. Buildings generate own energy etc.,TecEco technology provides ways ofsequestering carbon dioxide and utilising wastes to create our
11、 techno - world,It is essential we learn to live with nature and change our ways,7,One Planet, Many People, Many Interconnected Problems,Global Sustainability Alliance Partners are in the BIGGEST Business on the Planet Economic Solutions to our Energy, Global Warming, Water and Waste Problems.,8,Glo
12、bal Fresh Water,A finite resourcePopulation risingPer capita use risingWater-stress1/3 worlds populationBy 2025, 2/3 due to global warming.1 person in 5 do not have access to safe drinking waterYet water is the most common substance on the planet.Water covers 70% of the surfaceOnly = 1% is potable,9
13、,Australias Water Problems,Australia is the driest inhabited continent in the world - only Antarctica gets less rain. Most of Australia has experienced drought under El Nino conditions for the past few years.Some major cities are seriously short of water.Yet giga litres of stormwater go into our coa
14、stal water ways every year carrying with it significant levels of pollution.,10,Stormwater = Rainwater + Pollution,Pollution comes from many different sources, however the two main sources are Point and Non-point sources.Stormwater is the major cause of reduction in water quality in rivers and the d
15、estruction of marine environments.Stormwater is NOT supposed to include sewerage!Pollution is why it is not a good idea to eat too many fish from many areas near cities,Why mix rainwater and pollution?,11,Point and Non-Point Source Pollution,Point Source PollutionPoint source pollution is when high
16、levels of pollution enter a water system such as a wetland or river from one source, such as a factory, mine, sewage plant or garbage dump. Point source pollution is easy to trace.Non-Point Source PollutionNon-point source pollution is when levels of pollution enter a water system at various points and from various sources. This type of pollution is the most difficult to monitor and manage. The most common non-point source of stormwater pollution comes from local residents throughout a catchment.,
