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Concepts and Science for Coastal Erosion Management
Guidelines for implementation of coastal erosion management at
national, regional and local levels
Jan Mulder
Saskia Hommes Deltares / University of Twente
(Netherlands)
Concepts and Science for Coastal Erosion Management
Guidelines for implementation of coastal erosion management at national, regional and local levels
Concepts and Science for Coastal Erosion Management
Guidelines for implementation of coastal erosion management at national, regional and local levels
Concepts and Science for Coastal Erosion Management
Guidelines for implementation of coastal erosion management at national, regional and local levels
Concepts and Science for Coastal Erosion Management
Guidelines for implementation of coastal erosion management at national, regional and local levels
Concepts and Science for Coastal Erosion Management
Guidelines for implementation of coastal erosion management at national, regional and local levels
large diversity,
both at physical - and at policy- and management levels
Concepts and Science for Coastal Erosion Management
Guidelines for implementation of coastal erosion management at national, regional and local levels
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
a systematic approach : Frame of Reference
Concepts and Science for Coastal Erosion Management
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Strate
gic
leve
l
Tac
tical
leve
lO
pera
tiona
l le
vel
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
WHAT is achieved ?
HOW can it be tackled ?
WHAT is the problem ?
a systematic approach : question loop
Concepts and Science for Coastal Erosion Management
a systematic approach : question loop
Make problems, choices and responsibilities explicit !
Lovely ocean,
I must say ..It is just the coast
line that worries me
….
Concepts and Science for Coastal Erosion Management
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
WHAT is achieved ?
HOW can it be tackled ?
WHAT is the problem ?
a systematic approach : question loop
Concepts and Science for Coastal Erosion Management
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
a systematic approach : question loop
What is the problem ?
WHY is it a problem?
• functions ?
• regulations ?
• policy goals ?
• physical causes ?
WHO is concerned ?
• interests ?
• power ?
• responsibility ?
• finances ?
WHAT should be achieved ?
• Set objectives
WHO is responsible ?
• Specify examples:
• preserve dune strength
• maintain beach configuration
• reduce coastal erosion
• prevent damage to infrastructure
Concepts and Science for Coastal Erosion Management
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
a systematic approach : question loop
How big is it ?
What is the problem ?
WHAT measurable indicator(s) describe the objectives?
• What time- and space scales are involved ?
•What data are available ?
• What monitoring is needed ?
• What modelling is applicable ?
WHO is responsible ?
• Decision making process
• barrier width• dune heigth• beach width• shore line position • shoreface volume
• coastal cell volume
etc.
Concepts and Science for Coastal Erosion Management
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
a systematic approach : question loop
How big is it ?
What is the problem ?
Action needed ;yes / no?
WHERE and WHEN do the indicator(s) reach a critical value ?
• Benchmarking !
• What data are available ?
• What monitoring is needed ?
• What modelling is applicable ?
WHO is responsible ?
• definition of desired state
favourable sediment status
Concepts and Science for Coastal Erosion Management
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
a systematic approach : question loop
How big is it ?
What is the problem ?
Action needed ;yes / no?
What intervention is applicable ?
HOW to restore or maintain the desired state of the indicator(s) ?
• Choice of intervention method
WHO is responsible ?
• organization of erosion management
• finances
strategic sediment reservoir
Concepts and Science for Coastal Erosion Management
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
a systematic approach : question loop
How big is it ?
Action needed ;yes / no?
Does it work out ?
What is the problem ?
What intervention is applicable ?
WHAT is achieved by the intervention method ?
• evaluation of effects
WHO is responsible ?
• decision making process
Concepts and Science for Coastal Erosion Management
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Strate
gic
leve
l
Tac
tical
leve
lO
pera
tiona
l le
vel
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
Strategic objective
Tactical objective
2. Benchmarking procedure
3. Intervention 4. Evaluation procedure1. Quantitative State
Concepts
Desired state
Current state
OK?
OK?
Str
ate
gic
le
vel
Tac
tica
l le
vel
Ope
ratio
nal
leve
l
WHY
WHAT
HOWWHEN
WHERE
WHO
How big is it ?
Action needed ;yes / no?
Does it work out ?
What is the problem ?
What intervention is applicable ?
Concepts and Science for Coastal Erosion Management
Home / Guidelines / HOW TO DO IT ? / decision loop
www.conscience-eu.netwww.conscience-eu.net
COASTAL EROSION
> what is it ?
> when is it a problem ?
WHAT CAN BE DONE ?
> key concepts
> framework for coastal erosion management
> turning data into information
> potential interventions
> set back lines
> use of models
> EU policies and directives
HOW TO DO IT ?
> systematic approach
> decision loop
LINKS
> relevant weblinks
Concepts and Science for Coastal Erosion Management
a systematic approach : question loop
Make problems, choices and responsibilities explicit !
Lovely ocean,
I must say ..It is just the coast
line that worries me
….
What the ****do you mean ?
Concepts and Science for Coastal Erosion Management
Thank you
www.conscience-eu.netwww.conscience-eu.net
Concepts and Science for Coastal Erosion Management
Concepts and Science for Coastal Erosion Management
