What could be used to contain large amounts of water other than concrete walls?
353044
Define large, then define the application. Is it for potable water?\n\nWithout knowing more, here are some ideas:\n1. Steel, fiberglass, or metal alloy tank.\n2. Dirt (Pond, dam, reservoir)\n3. Plastic or plastic composites\n\nWithout knowing the application, restrictions, size, and other data, it is hard to pin down what is feasible.
362687
I found several sites using- tons of gravel per 100 sq ft - as the search term\nA couple sites are listed below.
129035
Liquid water, by and large, with some dissolved materials.
180104
How about a oaken bucket.  It is made from a natural products.  It won't dissolve in water.  It will certainly hold 50 pounds.  Place it on its side and it rolls across the floor.
589094
U Replace shower heads and faucet aerators with water efficient models.\nU Use a water-filled milk jug or plastic bottle in your toilet tank to displace water; this allows your toilet\nto operate using less water.\nU Choose nonphosphate or low phosphate detergents. High phosphate levels in lakes and streams\ncan kill fish and other wildlife.\nU Use a broom instead of water to clean your driveway or garage . Do not sweep debris into the\nstreet or storm sewer.\nU Put a spray nozzle on the end of your hose for car washing and plant watering to prevent the hose\nfrom continually releasing water and to control the amount of water used.\nU Use native plants in your garden that require less water.\nU Use cat litter or sand instead of salt on icy walks. Salt pollutes water and kills plants.\n\nU Do not let the water run while brushing your teeth or washing your face (you can save up to 5\ngallons).\nU Do not leave the water running if you wash dishes by hand.\nU Rinse all your dishes at once by using a dishrack placed in the sink.\nU Only run your dishwasher and washing machine when they are full.\n\nU Do not open fire hydrants on hot summer days because water needed to fight a fire will not be\navailable in an emergency. Also, opening fire hydrants is illegal.\nU Do not throw in the trash, pour down the drain, or dump on the ground paint, antifreeze, motor oil,\nand other household hazardous wastes, because they can migrate to your water source.\nU Dispose of tissues, dead insects, and other waste in a trash can rather than a toilet.\nU Plant native plants instead of traditional lawn grass to avoid the use of herbicides, pesticides,\nfertilizers.\nU Do not dump used motor oil on the ground or into sewers; throwing motor oil in the trash is illegal.\nRecycling centers and many service stations accept used motor oil for recycling.\nImproving Your Housekeeping\nU Fix leaks by replacing faucet washers and toilet flappers as needed. A slow drip or leak can easily\nwaste more than 100 gallons of water a week, which leads to an unnecessarily high water bill.\nU Put all litter in trash cans so it does not get washed into the storm sewers.\nU Clean up waste products while walking your pets.\nEducating Yourself and Others\nU Educate your community about the effects of dumping waste, such as pesticides, down drains and\ninto waterways.\nU Encourage your neighbors, family, and friends to install low flow water fixtures and to practice\nwater conservation.\n\n\nMaybe you can not stop but it is easy to help decrease pollution.
550838
Well, i was involved with some folks who were catching the rain off their rooftop in barrels, then using it to water gardens etc.  They had to modify the downspouts to go into the barrels.  Any way to catch, direct and store the water will work.
60733
simply use a hydrometer.
70843
i. Channel rainwater from your roof and maximise the storage of rainwater.\n2. Re-use grey-water (from showers, washing clothes) through a natural plant filter for use in irrrigation, washing, flushing toilets. \n3. Check your water system for any leaks\n4. Use a dry toilet (natural composting system)\n4. For more ideas, check out any Permaculture websites
604741
add water, keep in a moist environment, under a shade away from the sun
567177
Their are various ways.  One way where i live is by putting large nets to cover the area.  This holds the rocks in place.
141140
Get rid of debris that retains moisture.
57621
Anything that has a higher density than water.
142989
I am having a hard time picturing the gaps you are trying to fill, so I'm not sure if my ideas will be helpful.  Perhaps you could try ceramic as an insulator.  It also depends on how long the surface will be exposed to the high temperatures.  If its not too long, perhaps you could use wood that has been soaked overnight in water.\nThe aluminum isn't a bad idea, but perhaps you need thicker aluminum.  Like maybe cut open a few soda cans and flaten the result into a crude sheet of aluminum.  Maybe two or three layers worth would do the trick.\nMaybe some gravel or stones?\nWell, those are just some ideas.  Not sure if any of them will work, but maybe that gives you some things to explore.
437917
I would recommend a fire hydrant,the water is free.
346689
assuming you are going to fill it to about 4" from the rim, you will use approx. 5455 gallons of water
8036
Some of the water in the tube will adhere to the walls. If there is enough surface tension, the weight of the water will not be sufficient to allow the water to drain from the tube and the tube will not drain at all.
905607
make a little "boat" that you can add weights to and float it in the different liquids.  Gradually add weight to the boat in each liquid to see how much it can hold before it sinks.  The more weight the boat can hold, the greater the density of the liquid!\n\nThis is basically a poor-man's hydrometer.