I found this intresting site about "bushwalking", but this page in particular was good.

http://www.bushwalking.org.au/FAQ/tarp/TarpShel.htm

I hope ya'all like it.

Ted

basic but interesting. tarps are best used to weatherproof brush shelters by securing them over your emergency shelter and covering them with dirt, leaves, branches, ect. this will give solid support to the tarp and rain and wind protection to your shelter.