Assets are increasingly being depleted due to siltation as a result of catchment's degradation.

In addition, siltation can distribute contaminants and smother organisms inhabiting the reefs.

1995 “Siltation Pattern in Kingston Harbour”, a technical study for the Port Authority of Jamaica.

Half of Africa's reservoir capacity, for instance, could be lost to siltation with dramatic impacts on water supply .

Changing rainfall patterns are likely to further intensify the siltation of rivers and the deterioration of watersheds.

In some developing countries, siltation of coastal areas is becoming severe as a result of inland deforestation, the construction of lumber roads and land-clearing.

These environments are suffering from pollution (siltation from soil erosion, marine-based and inland water pollution and the destruction of mangroves for shrimp ponds and aquaculture) and depletion of marine resources from, for example, over-fishing and destructive fishing methods.

Furthermore, nearly 5,000 indigenous households (about 26,000 individuals) are going to be affected by the sedimentation and flooding to be expected from the reservoir's eventual siltation, and more than 3,000 households will be affected by watershed management.

(c) Areas where accelerated agricultural development and land consolidation is causing loss of rural landscapes, biodiversity and wildlife habitats, reducing the quality of surface and ground water, and causing siltation and pollution in neighbouring wetlands, inland waters and coastal zones;

Mechanical disturbance by towed gear (trawls and dredges) often results in the alteration of critical habitats and siltation of the seabed and can make such ecosystems and habitats unsuitable for marine biodiversity.