This Is A Study Contract Awarded For The Carrying Out Of A Hydraulic Study On The Watersheds Of The Tributaries On The Right Bank Of The Liane In The Municipalities Of Isques And Hesdin-L'Abbé And In-Depth Diagnosis With Modeling. Of The Hydraulic Functioning Of The Briques Stream In The Commune Of Isques And The Brucquedal Stream In The Commune Of Hesdin-L'Abbé. Boulonnais Is A Territory Highly Exposed To Natural Risks Of Flooding By Overflowing Rivers And Runoff, Accentuated In Certain Cases By The Influence Of Water Tables, And Also By Marine Submersion And Coastal Erosion. In This Sense, Symsageb Carries A Flood Prevention And Action Program (Complete Papi) Which Was Labeled On July 4, 2018. In This Context, A Study Is Desired On The Municipalities Of Isques And Hesdin-L 'Abbot In Order To Have A Very Detailed Knowledge Of These Sectors. This Will Involve Taking Into Account All Hydraulic Operations Of All Kinds Whether On The Draining Sub-Watersheds Of The Tributaries Of The Liane On The Right Bank, Namely (From Upstream To Downstream) - Stream De Bruquedal - Ruisseau Dit Le Rieux - Ruisseau De Cour Colette - Ruisseau Blanchard - Ruisseau Dit "Des Sources" And Source Upstream Of The Subdivision Of The Sources - Ruisseau De "Saint-Etienne Au Mont" Corresponding To The Sub-Catchment Basin Of The Springs Coming From The Mont D'Herquelingue (Procedure For Classifying A Watercourse In Progress) - Other Intermittent Watercourses, Ditches Or Runoff Axes This Study Aims To Understand The Hydraulic Functioning In The Sectors Concerned, To Formulate Proposals Practical Arrangements To Be Taken Into Account To Reduce The Dysfunctions Observed And Move Towards The Good Ecological Status Of The Watercourses And To Model The Flood Dynamics According To Several Return Periods On Only Two Of The Six Sub-Watersheds, Namely Those Of The Pont-De-Briques And Brucquedal Streams.

Teklif Çağrısı