The Densu river is seriously under threat from various land-use activities within the basin. These are agricultural, indiscriminate waste disposal, as well as building and construction.
These activities pose a great threat to the sustainability of the Weija Dam and water quality of the river in general, these developments if not checked will have grave consequences on water supply to the western part of Accra metropolis.
These activities according to experts have reduced the vegetative cover, making soils more vulnerable to erosion into the river, which has serious implications on channel morphology and sedimentation of the Weija Reservoir because the Densu feeds into the Weija Dam.
A visit to the Densu River at Tetegu, a community in the Ga South District of the Greater Accra Region, showed that the 35 m buffer restricted zone demarcated under the Executive regulation of the river has been seriously encroached upon.
It could be recalled that the Greater Accra Regional Office of the Ghana Highway Authority (GHA) on Thursday, June 25 2020, stopped a developer from constructing a washing bay near the catchment area of the Densu River at Tetegu.
The reason was that he is building on a Waterway which blocks the flow of rain water and gets the area get flooded whenever it rains.
Few months after, a visit to the same site over the weekend showed that another encroacher(developer)is busily leveling and filling the site, with about 200 trips of sand within the same catchment area where another developer was stopped from putting up a washing bay.
In an interview on Thursday, June 25 2020, in the Daily Graphic, the Ghana Highway Authority Director, Mr Lawrence L. L. Lamptey made it clear that wetlands were to be protected for the sustenance of biodiversity and environment protection, therefore, there was no way a permit could be granted for the construction of any structure.
Mr Lawrence L. Lamptey, described the annual mud sliding at Weija in Accra near the Kasoa tollbooth as a disaster waiting to happen if these illegal structures are allowed to go on.