Hessle Fleet Drain

Overview

Mason Clark Associates (MCA) were delighted to have been appointed to assist East Riding of Yorkshire Council (ERYC) with a study for a flood alleviation scheme for surface water runoff in Hessle.

Challenges and Solutions

Following numerous flooding events of varying degrees in the Hessle Area, but notably in 2007 when over 200 properties were affected, MCA were appointed by ERYC Infrastructure & Facilities to deliver a detailed Flood Risk Assessment on Hessle Fleet Drain.

Previous flood events in parts of this low-lying and relatively flat area near to Fleet Drain and the Humber Estuary were studied so that potential solutions can be developed. The source of flooding that is the focus of this scheme is the surface water runoff from areas to the north and west flowing to the south and west into the Fleet Drain.

MCA's Contribution

To achieve this detailed flood alleviation study MCA appointed subcontractors to carry out integrated hydraulic modelling and site surveys, to better understand and inform the study of the influences of the fluvial systems during a pluvial event.

This then enables an Integrated Catchment Model (ICM) to be developed which can simulate different intensities and durations of rainfall, taking into account overland flows and structures, as well as some below ground infrastructure, such as the public sewer network.

Investigations and assessment of the existing area were needed to make sure that any future solutions are appropriate.

Results

This and other similar commissions have led to the development of East Riding of Yorkshire Council Local Flood Risk Management Strategy. Ultimately resulting in flood defence project delivery, both small prevention schemes and such projects as the £11m National Award winning Hessle Foreshore Tidal Defence Scheme, designed and delivered by Mason Clark Associates.