Definition of rappel for English Language Learners : to move down a steep cliff, rock, etc., by pushing your feet against its surface and sliding down a rope RAPPEL Defined for Kids
How much water you need to drink to get the most benefits depends on your diet, exercise routine, health and weather. You can start by aiming for the basic recommended amount for adults, which is 8 to 12 cups a day, according to Clemson Cooperative Extension, and making adjustments as needed.
Excess water is removed from your body through sweating as well as urination. MedlinePlus recommends drinking six to eight 8-ounce glasses per day. While a gallon of water is double the recommended intake, the excess will simply be excreted by your body.