15 april 2023

Inland shore concept:Water retention combined with water level fluctuation as a basis for a revenue model Roel Doef (Rijkswaterstaat), Remco van Ek (Deltares), André Oldenkamp (DeRuimte-Advies), Wouter de Zeeuw (FOM consultants), Rein Kruk (Province Noord-Holland),

Karel Bruin Baerts (HH Hollandsnoorderkwartier)

Water, Agri-aquaculture

September 9th 2014

15 april 2023

Content

1. Inland shore concept?

2. Wieringermeer

3. Building pilots

4. Concluding remarks

15 april 2023

1. Inland shore concept

Many challenges:

- Water safety

- Fresh water supply

- Water quality objectives

- Fish stock decline

- Nature (protection, development)

- Water recreation (€)

- Autonomous developments

Lake IJssel

April 15, 2023

1. Inland shore concept

• Inland water storage withsignificant water level fluctuation

• Room for water storage to prevent flooding and water scarcity

• “Water is an opportunity”

• New sustainable areas for work and living

• Innovative combinations: water storage, food, nature, recreation, living, working

• Dynamic landscapes, room fornatural processes, CO2 sink

• Opportunities for WFD, Natura2000, new habitats

• Opportunities for recreation

Flexible water storage with new functions

1. Inland shore conceptSource: Kwint van den Berg, www.bergrecordings.com

Pilot Koopmanspolder:Fish, Nature, Landscape

April 15, 2023

2. Wieringermeer

• 1st polder in Lake IJssel (200 km2)

• Constructed during 1927-1930

• Land surface ~ 4 m below Lake level

• Upward seepage, salt load

• After WW-II: food production

• Mono-functional: agriculture

Pilot Wieringermeer:Agriculture, Aquaculture, Recreation

2. Wieringermeer

Urgency for change?

Short term:1.Up-scaling: more efficiency, but low job creation2.Population aging: youth leaves area3.Regional economy not strong4.Loss in facilities, decrease in livability

Long term:1.Autonomous developments: water level rise, salt load2.Climate change: more extreme weather events3.Globally: water and food becomes more scare

3. Building pilots

Bottom upapproach

Food production is starting point

Open process, trust

A concept,not fixed ideas

Small scale experiments

Extend from there

Bottom upapproach

Food production is starting point

Open process, trust

A concept,not fixed ideas

Small scale experiments

Extend from there

3. Building pilots

Dike pioneers Dike pioneers Sun farming Sun farming

Aqua-test ribbon Aqua-test ribbon Agro-recreation Agro-recreation

3. Building pilots

Climate landscape Climate landscape

agriculture – living - economy

Water storage & new economic activities

Protected shoreline: econ. activities

Open water

April 15, 2023

3. Building pilots

Roel DoefRWS WVL

Andre HiemstraHiemstra BV

Marc van RijselbergenZilt proefbedrijf BV

Gerard ManshandenFishflowinnovation BV

Ton GarritsenRWS IJsselmeer

Karel BruinHHNK

Andre SeinenMeromar BV

Theo van de GazellePlv DG RWS

Remco van EkDeltares

Rein KrukProv Noord-Holland

2014

3. Building pilots

Innovation inThe Golden triangle

Knowledgeinstitutes

Private sector

Public authorities

AmbitionKnowledgeBudget

Shared vision,Linked objectivesDeltares

•Contributes to cases•Water system knowledge•Monitoring & evaluation•Funding activities

3. Building pilots4 different cases

Floating crop cultivation

Saline crop cultivation

Mitten crab cultivation

Recreational fish ponds

April 15, 2023

3. Building pilots

• 20 ha farmland (incl farm)• Significant budget • First case: ‘Mitten crab’

work in progress2014-2018

April 15, 2023

4. Concluding remarksFrom theory to practice

1. Link long term vision to short term objectives.

2. A good idea is nice, but you need strong partners for action.

3. Building a good consortium takes time.

4. Storyline must be simple and easy to understand.

5. Invest in PR and communication.

6. Think in opportunities, not in problems.