I. Direct Rainwater Harvesting
Rainwater harvesting techniques collect the rainfall before it enters the soil, i.e. as surface runoff.
The collection and concentration of rainfall and its use for the irrigation of crops, pastures, trees, for livestock consumption and household purposes is called rainwater harvesting.
Roof & Courtyard Rain Water Harvesting

Water is collected from the rooftop of a house (and some times a courtyard). It is then transported though a pipe to be filtered and stored for domestic use. In Greece this technique is called Impluvium.
