John C Daley

So you may have about 78,000L of rainfall per year.
That is a great resource, and may be more than enough without taking water from te stream.
If you plan to capture 20,000 L in one tank I can help you plan it.
That tank would be about 4 M diameter.

The terminolgy may be incorrect, I live in Australia where we have never heard of this phenominon, its when the ice builds up for any reason in the gutter
causing all sorts of issues, one of which is destruction of that same gutter.

Have any of you seen the technique used on solid surfaces https://hotedge.com/ice-melt-system-asphalt-roof/

 have learned from another Permie the issue of ice damming  and the destruction it causes.
I was discussing a gutter system to catch rainwater and Catie explained the ice damming issue can wreck everything .
It was a shock to me.
But I found this comany that creates a hot edge and wondered if anybody knew about it?
hot edge
They have treatments for different types of roofing.

Interesting project.
I deal with water. Look at my signature.
Some questions first;
- what size roof do you plan to have?
- what rainfall do you have annually?
- what crops and water consumption are you hoping for?
- Is the road at the bottom o fthe photo?
- Will any sun land in your garden?
- Where is north in the photo?
- Is there local power or do you make your own?

Even though its more money, I would go a metal roof and then its immeadiately.

Great explanation of changes in building methods.
And how they are not always better!

Firstly, you are building an earthship, space should not be an issue.
When you think about we are talking about 4 or 6 inches across the building, its negligable!
As Christabel mentions, we need more information about the land, the climate location to give opinions about the rear wall.

Another informative video making adobe bricks in a yard