Of course, the main influence on streamflow is precipitation runoff in the watershed. Rainfall causes rivers to rise, and a river can even rise if it only rains very far up in the watershed-remember that water that falls in a watershed will eventually drain by the outflow point.
One US gallon of water weighs 133.526464 ounces. The calculations for that answer are below: 1 gallon = 8.345404 pounds 1 pound = 16 ounces 8.345404 X 16 = 133.526464.
Therefore, the question of how many fluid ounces are in a pound is meaningless until the measured liquid is known. The same volume of one liquid will weigh more than the same volume as another because it is more dense. In the example of water and oil, water is denser than oil. Therefore, 16 fluid ounces of water weighs 1.04 while 16 ounces of oil only weighs 0.95 pounds. The same volume of mercury weighs more than 14 pounds.