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.
Doctors say it is beneficial to drink at least 8 glasses of water per day. If you are not used to drinking a lot of water, start out by drinking 3-4 glasses of alkaline water per day (approx. 1 litre) and gradually increase your water intake to 8-12 glasses per day (2 to 3 litres).