The damming of the Nile river has reduced the flow of water downstream and reduced the amount of silt going downstream because it is trapped behind the dam - upstream.

With the increase of upstream siltation (B), the delta downstream is actually shrinking rather than growing (A). As well, with less water going downstream, the wetlands are drying out rather than increasing (C). Lastly, because nutrients in the silts are being trapped behind the dam this is negatively affecting the fishery downstream in the Mediterranean instead of helping it (D).