Dear John,
Thank you very much for your detailed explanation and I agree to your decision.
I am a bit surprised, though, to learn that sedimentation is not WWF's concern. The once inter-tidal Gei Wais are now relying on dredged inlet channels to maintain their function, as a result of the fact that the once inter-tidal zone at the Gei Wai location has moved far away toward the river, due to sedimentation. I would have thought that the mangrove forest has played a part in slowing down the water current and causing siltation around the mangrove forest and raising the mudflat level.
Best regards,
SY Chan