Since 2014 we develop the colorgarden – jardi d’colors / laboratori d’artistas – and bringing water to the plot was ever a challenge and still it is. In the beginning we had only one barril of 200 liters and a little peugeot car and some buckets. Water in the garden was ever a valuable treasure.
By expending the infrastructure with more than 30 raised beds in the vegetable garden and a educative aquaponics project we added step by step ibc tanks to be able to store more water.
Also we started to use a trailer to be able to transport 1000 liter at once. To give the ibc tanks a stable support we used second hand wood pallets.
To support the heavy installation and to prevent the pallet wood from termites we used cement stones as a foundation. This keep the wood dry after rain. We also divided the infrastructure in different segments to reduce water loss by accidents and leaks in the water pipes.
Also we segmented the infrastructure for different usage: art camp, tree watering, open kitchen, vegetable garden.
The ibc tanks are refurbished and primary used in the food industry, mostly for lemon juice transport.
Some visitors are criticizing that the usage of ibc tanks and the transport of water by car and trailer in such little quantities of 1000 liter is not sustainable and not helpful at all. They suggest to harvest rain water or water from our asequia would be much more efficiant. They are right in general but to create a bigger central deposite we need an investment of more than 5000 Euros.
We need actually between 50.000 and 100.000 liter of water per year for watering, service (kitchen, shower and sinks) and construction. To compare this: a four-person household requires on average about 164 cubic meters (164.000 liter) of drinking water per year.
We welcome between 50 and 200 visitors per year in our community and we have sometimes lunch and dinner for groups up to 60 person in the garden and we are watering the plants as little as possible.
The main decision is still, to start with what we have and what we can support. Instead of waiting for subventions or funds we start and we keep our installation – as much as possible – independent from public water supply and we start with planting fruit trees – which will take years to get a certain amount of fruits. These growing trees willl spread some shadow in the vegetable garden and this will reduce watering, als well as the deep roots of trees will lift huminity in the upper region of the soil.
Re-using local materials, re-use water from sinks, showers and open kitchen and restrained watering of plants will lead us to the best possible solution, which is for sure not the best solution.
As a side effect our restricted water handling is a good sensibilisation for our guests. The 50 kids of a german high school used less than 1000 liter in one week for shower and sink. The installation of 3 dry toilets was supporting this.