Linked from
The 6 pages that link to Delta subsidence, each with the reason it gives.
Nile DeltaRelated: Subsidence lowers parts of the Nile Delta relative to the sea.
River deltaRelated: Subsidence lowers delta surfaces and increases their exposure to flooding.
Mekong DeltaRelated: Subsidence lowers land already exposed to flooding and rising seas.
DistributaryRelated: Subsidence can increase flood exposure in areas crossed by distributaries.
Krishna RiverRelated: Dams trap sediment upstream, reducing material delivered to the Krishna Delta.