With a liquid measuring cup
You will want to make sure you measure properly so look into tape measure, wood and nails. You may want to add a window as well, and siding for it to make it water proof.
One must measure the coefficient of disparity in a demand supply curve properly.
You can't measure a plant with water.
No, you measure water in cups or ounces.
So you can make recipes properly.
Improper water chemistry - stay out of the pool until they learn how to properly maintain a swimming pool. Last measure would be to test the water yourself for proper chemistry.
I don't think you can measure water. Sorry xD
Salinity is a measure of the saltiness of water.
to for example measure the pressure under water
Take a platic measuring band,like used for clothing to measure and measure that way
only the height of it. for example water in a container then, you can measure the depth
Submerge it in water and measure how much the water rises.