Posts Tagged ‘water’
Dam Nation: Dispatches from the Water Underground
Product Description
Edited by the coauthors of the notorious zine The Guerrilla Graywater Girls Guide to Water, this collection of original essays, drawings, and photographs is part radical history of water and part DIY guide to disengaging one’s home, school, or workplace from the wasteful water grid. The pieces are arranged in three sections: “Water Wars” focuses on the history and politics of dams and water infrastructure; “The Water Grid” chronicles the rise of energy-intensive, po… More >>
Dam Nation: Dispatches from the Water Underground
A certain dam is holding back fresh water 181 m deep. What is the water pressure at the base of the dam?
A certain dam is holding back fresh water 181 m deep. What is the water pressure at the base of the dam?
Not sure what to do here. P = F / A ?
I want to plant water lilies in my dam, but need to protect from yabbies. How can I do this?
Yabbies are like a kind of small crayfish that are native to Australia. They can apparently be very destructive & dig up plants, eat leaves/flowers, etc of water lilies. There are lots in our dam & eradication isn’t an option. So I need to come up with some kind of protection. The only idea we’ve had so far was to buy some thin wire or mesh, with holes small enough to let water through but not yabbies. Then to make that like a kind of giant bowl and put it into the dam… and plant the water lilies in big buckets (with small holes drilled to let water through) inside the wire bowl. The wire would need to protrude above the water level at least a bit, so as to stop the yabbies just swimming over it. Does anyone have any other suggestions?