The erosion and it's effect on the environment, this is a serious issue but government ignore and it has washed away a lot homes just by starting like this.
Just take a look at this and imagine how many people have been made homeless just by this over flow of what that hasn't been channelled properly.
I was just going about and saw all this though deposit everything nature is so wonderful and fascinating I can imagine how water could dig the soil just like this and then it becomes something so hug and problematic for the human environment.