<sod >The report included a submission from the Association of Drainage Authorities, which warned: âWe are deeply concerned at the decisions to reduce maintenance of flood defencesâ¦ It is essential that adequate revenue funding is provided to enable the Environment Agency to conduct the necessary dredging.< eod>< sod > The report included a submission from the Association of Drainage Authorities, which warned: "We are deeply concerned at the decisions to reduce maintenance of flood defences...It is essential that adequate revenue funding is provided to enable the Environment Agency to conduct the necessary dredging." "The Rivers Tone and Parrett are considered to be between a third and two-thirds of their capacity, exacerbating the extent and duration of flooding," the evidence continued.< eod>