de ceuvel: phase I 5 water supply quality levels. A 2 m3 for potable water. Filtered (but not upgraded water) will be stored in a 1 m3 used for garden irrigation. holding tank will be used tank and can be The type of material used for surface collection should be free of chemical additives to avoid contamination. Rainwater quality on the site will first need to be tested to ensure that ambient pollutant levels are low. If this is not the case, then reverse osmosis will need to be added as a purification step in addition to UV filtration. COST & LABOR ESTIMATES Rainwater harvest potential on the de Ceuvel site is around 800 milimeters per square meter per year. We intend to use the roof of each houseboat as a rainwater collection system. This rainwater will be put through a sand filter prior to storage in water tanks. An upgrading system including UV filtration, water soſtening, mineralizers and stabilizers will purify the water to potable quality. The collection system will consist of pipes of 5 - 10 centimeters in diameter connecting to the filtration and treatment system. Water storage tanks will hold water of different A DIY rainwater collection system will cost an estimated 800 € if all materials need to be purchased new. However, most boats will already have some form of guttering which can be reused for this purpose amounting to a significant cut in costs. The installation of the system will require an estimated 20 hours. Upgrading the water to drinking-level quality will cost approximately 1.500 € and 25 hours of labor. We recommend that this step be leſt for phase two. If the water collection system proves too expensive during the pilot boat construction, we will default to a standard municipal water connection. 6 sensors COST & LABOR ESTIMATES A Raspberry Pi microcomputer retails at 35 €. An arduino costs around 100 €. We estimate that the sensor system for each boat will cost an estimated 500 € and cost 10 hours to install. This installtion time does not include the design and programming of the system. Sensors for temperature, pH, and resource flow monitoring should be installed during the construction process whenever feasible. Placing them at this stage while many technologies are exposed will facilitate the monitoring and display system that will be installed for the community in phase two. Recent advances in sensor technology, and the development of small plug-and-play modules such as Arduino chips makes this cost-feasible. Inexpensive microcomputers like Raspberry Pi can also be used to monitor and control distributed sensor systems. Pagina 44

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