So, if you want to explain this dream, the most important thing is how your emotions and feelings change in the dream. Moreover, your age and gender are different, and the meaning of this dream will be different for you.
Going to grandpa's grave is a kind of respect for the deceased and can also be understood as a memory of the past. It seems that it's hard for you and your father to walk such a long way. It is not easy to walk, and I have encountered many difficulties. You mentioned yellow water twice. Generally speaking, I wonder if it is khaki? This represents a feeling of heavy depression, and suffocation is a feeling of being bound. Judging from my current understanding of dreams, some things you want to do at present may encounter some difficulties and need to be careful.