Our inability to change everything should not stop us from changing what we can.
a means for creating a [negative]
movement pressure, in the preferred form of a turbine, may be provided
on the output…
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.
Our inability to change everything should not stop us from changing what we can.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.
Mori no Niwa wrote:
Jeanna,
Thank you for sharing your experience. I'm starting to dig a small (6x8' roughly) dew pond and will be modeling it after the description of yours, except that I hope to use a piece of pond liner or pool liner rather than a poly tarp. Just to clarify, you put down the straw, then one layer of the plastic, and that was it? Or did you have a second plastic layer somehow? I was a bit confused by the "water dripping on the underside" bit. Also, what benefits do the rocks give, just making it more resilient and less prone to puncturing, or something to do with thermal mass? Just wondering if I need them or if it would still work without.
Thanks again!
PJ
www.thehappypermaculturalist.wordpress.com
Suzy Bean wrote:
Paul's presentation on Replacing Irrigation with Permaculture at the Inland Northwest Permaculture Convergence: http://www.richsoil.com/permaculture/508-podcast-087-replacing-irrigation-with-permaculture/
Paul talks about using dew ponds.
Off The Grid wrote:
So my question to the readers at Permies.com is, what are some guidelines to consider when modifying dew ponds so that they still will hold water. I'm sure if I dig down deep, I'lll pass through the hard pan clay and get to better clay beneath and I'm concerned that I might make the pond leaky like a swale. The end results would be more water getting back into the ground but also there'd be no frogs/toads.
If anyone has something useful for me to consider I'd appreciate if you shared it! Thanks!
Len Ovens wrote:My first thought is to fill the pond or at least part of it with big rocks. These act as shade as well as something cool(er) for any water is the air to condense on. It seems to me this is one of those things talked about in one of the podcastes/threads but I can't remember which one. Rocks are also great to encourage wildlife... like your frogs... and the animals that eat them. The less you can see of your water, the longer it should last. It is hard for me to test this as I live in a less than dry climate.
Off The Grid wrote:
Len Ovens wrote:My first thought is to fill the pond or at least part of it with big rocks. These act as shade as well as something cool(er) for any water is the air to condense on. It seems to me this is one of those things talked about in one of the podcastes/threads but I can't remember which one. Rocks are also great to encourage wildlife... like your frogs... and the animals that eat them. The less you can see of your water, the longer it should last. It is hard for me to test this as I live in a less than dry climate.
I have been considering your idea for a few days. It seems to me that the only way this could work is if there were several layers of rocks high because the sun on the Carrizo Plain is about the hottest sun I've ever felt. Honestly it's like hotter than other places for some reason the rays of the sun make it through the atmosphere more there (it's a fact actually). So I'm thinking if it were one layer of rocks then there'd be excessive evaporation during the days as soon as the first rock gets exposed to the air. My fear being it would evaporate more than it would condense. What do you think about that? Anyway, to bring rocks out there, that will cost me like probably a minimum of $1000 so I'll have to really consider this long and hard. I have maybe a week or two before they fill up. I was thinking next weekend, find the low spot in the large pond, and dig a trench in the center, going down 1 foot. If I do that the length of the pond I am thinking I will have enough water that frogs may reach maturity. That's a lot of digging bar muscles to make that work, but I'm thinking maybe 6 hours in the cooler weather... it'll be good exercise.
'Science is the father of knowledge, but opinion breeds ignorance.' - Hippocrates
Robert Ray wrote:From my metal roofs I collect a surprising amount of water from dew.
Solar chimney sounds as if it would work too.
I am going to try pumping my hot greenhouse air through tubes in a raised bed this year. Running through the tubes it is reported to dehumidify and heat the bed as the air cools in the pipe manifold buried in the bed. I'm curious as to just how much water will condense out as it runs through the tube.