Run-of-river hydropower schemes are often installed on existing weir structures. The Environment Agency has evaluated how such installations can affect the weir pool habitats found immediately downstream of weirs.
A literature review found no specific studies on weir pools as ecosystems. Consequently, a modelling study to predict how the characteristics of these locations may change was undertaken. A framework was also produced for evaluating the potential value of weir pools to help assess the impact of proposed hydropower developments on weir pool habitats.