QUantification of Erosion/Sedimentation patterns to Trace the ...

choppedspleenMécanique

21 févr. 2014 (il y a 3 années et 3 mois)

51 vue(s)

Ghent University, Renard Centre of Marine Geology

Management Unit of the Mathematical Models of the North Sea

Catholic University Leuven, Hydraulics Laboratory


Catholic University Leuven, Regional Geology

Flanders Hydraulics
i.c.w. Maritime Services, Flemish Government

Ghent University, Marine Biology Section


RBINS, Dept. Invertebrates


Flanders Marine Institute

QU
antification of

E
rosion/
S
edimentation patterns to

T
race the natural from the
anthropogenically
-
induced

sediment dynamics

BelSPO
-
SSD

Strategic Research Network

2007
-
2009
-
2010

SSD
Priority Research Topics

Quest4D is an
oriented
-
basic research
project offering a
basis for decision
-
making and contributing to
(inter)national research efforts related to:



Process studies


Impacts of anthropic and natural pressures


Evaluating and developing integrated policy and
management measures

Why ?


Up
-
to
-
date impact studies remain inconclusive,
regardless of the extensive field work and modelling
exercises; mostly NO baseline studies; still


Marine Strategy Directive:


Aiming at a ‘good’ ecological status of the marine
waters in the near future; need for


Setting realistic environmental targets;


Well
-
balanced monitoring programmes;


Assessing natural vs anthropic pressure and variability


Ecosystem goods and services


Please elaborate on how the project can benefit the implementation of the Marine Stratege Framework
for the Belgium policy makers.

Will be project become more policy relevant when an ecosystem approach is used as an overall
framework and focus the outcome of the project along ecosystem functions and services

CHALLENGES


Conservation of
biological diversity


Conservation of
biological resources


Conservation of
living and recreational
space

Three major trends


Changes in hydrodynamics and sediment dynamics (e.g. sea level rise, coastal
protection)


Changes in biogeochemical cycles (eutrophication, new substances, restoration)


Biological change (species changes, foodweb, mariculture)


Changing Coastal Seas

DRIVERS


Climate change


Intensification of use


Societal change

Analysis, monitoring and prediction


Efficient and economical monitoring systems


Regional system models


Linking observation and models


Enabling a Science
-
based management of coastal waters

sensu

Colijn, 2009

Process studies

Measurements

Morphology

Sedimentology

Biology

Hydrodynamic and
sediment transport


Instrumentation

Multibeam bathymetry

Side
-
scan sonar

Boxcoring

Grab sampling

Seismics

Free fall
penetrometer


Multi
-
sensor tripod


Active Cooperation

UG
-
RCMG

UG
-
Marbio

MUMM

WL

Historic samples

Characterisation of erosion/deposition areas

Process Modelling


Development

of integrated models (hydrodynamic
-
sand/mud
transport


wave) incl. the offshore, nearshore, foreshore
-
beach and Scheldt estuary


Sediment transport: sand
-
mud interaction:
NEW
bed model


Wetting
-
drying schemes


Dynamic coupling of currents
-
waves


MUMM (coordinator)

KUL



Coherens

model



Sediment transport (sand/mud)



Flocculation model



Telemac

model, WAM



Dynamic coupling currents
-
waves



Sediment transport (sand)

WL



Delft 3D



Sediment transport (mud)



Idealized
modelling

to address impact studies

Model
intercomparison

Model
intercomparison

Model
intercomparison

a.o
. Exchange of boundary conditions

Minimising

differences between observations and model output
! Bottom
vs

surface processes

Fine
-
tuning of parameters

< process studies

Data management

http://www.mumm.ac.be/datacentre/Databases/QUEST4D/index.php

Selection criteria

Today’ purpose


To discuss new measurements, observations and findings of the
last 2yr. Issues:


Influences on sediment transport;


Larger scale sediment fluxes (sand/mud)


Discussing ways how to upgrade the data into tangible
environmental
targets and indicators

of use for a sustainable
management of our seas (goal next 2yr). Issues:


Significance of anthropogenically
-
induced changes vs natural variability;


Views on sustainable exploitation

(dredging, extraction, coastal protection);


Monitoring of cause and effect: practical approaches?

A common goal for

the future ?