Surface irrigation system involves catching rainwater and pumping it through riser pipe to roof ridge, and collected rainwater is sprayed by means of nozzles

摘要

The surface irrigation system involves catching rainwater and pumping it through a riser pipe to the roof ridge. The collected rainwater is sprayed by the means of nozzles. The riser pipe is run beneath the roof covering towards the hip tile with new constructions, and the hip tile is equipped with nozzles.