Magical Current / Magical Current

It is a conceptual design of kitchen tap. The design is able to conserve water effectively with simple components.
In our daily life we usually forget to turn off the tap and make the basin unwatched.So the overflowed water will flow away through the outlet,which results in the waste of water resources.
So the challenge is how to avoid such care and make the taps more "intelligent".If we solve the problem successfully,we can not only save much water,but also srouse the public awareness of environmental protection.