Calling it a water park maybe a stretch. It would be better to call it a "water complex". The section you are referring to is called Uwanja Camp. There will be different water features; i.e. water pop fountains, giant water buckets, water cannons. According to the description these water features will appeal to various age groups.
Thanks for the length of the slide (sounds comparable to the length of BC) I think there is also some type of “waterfall” into the main pool also (out of something that looks like a rain barrel from the artwork).