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.
Answer: Weight of 1 US Gallon of water = approx. 8.35 lb Weight of 1 imperial gallon (eg UK measure) of water weighs 10 pounds by definition, at a specified tempe â¦ rature and pressure. Note: There are comments associated with this question.