Look across the morass. Look North and the district you see at the base of the hills is called "Silver Spring"....... that's where Discovery Falls is. Look a little bit south and you're looking at Springfield. Go up to Mt. Airy and look South of Springfield and you'll see Spring Garden. That range of hills and the bigger ones behind them are what created the morass. The districts are all called "spring" because we have a lot of springs.
After a strong rain those hills drain down to the morass along with the normal flow of fresh water from the springs. Sooner or later that brown water mix hits Long Bay and then becomes "brackish" (salt and fresh mixed) which turns it even darker.
That's what you're seeing. Thank Jah for the rain...
The brown soon gone....