From Longman Dictionary of Contemporary Englishwater jumpˈwater jump noun [countable] DSHan area of water that you have to jump over during a competition, race etc Her horse fell at the water jump.
Examples from the Corpus
water jump• The course may have a water jump.• But he recovered his balance in a stride and made off for the water jump.• I had inspected the water jump with great suspicion before the race.• As I rounded the final bend I came face to face with the water jump.• The water jump was always going to provide the major point of interest. 