POLLUTED condition is one of the factors,VERNON on occasion when i walk pass LANCE BDG.and look over d edge sometimes i wonder if thats the same RIVER i use to dive in d BUSHERY MOUTH,boy there is nothing there any more (LOL) just a stream especially in the dry season, Could be climate change taking its toll(may Be) and i understand its not much bigger in d rainy season, (NO wonder that so Many houses is taking up Residency in d River Course (LOL) How times has change,