I am lost about what yang refers to in this sentence. Bagian terdangkal?
It refers to "bagian"
yang lain = other parts (of the pool)
The shallowest part of the pool is here, the rest of the pool is deeper (than here).
Would “ada” instead of “adalah” be preferable here?
Bagian terdangkal kolam ini ada di sini = The shallowest part of the pool is located here