Hydrogeologische maatregelen zelfvoorzienendheid in de Zuidwestelijke Delta, NL: GO-FRESH Gualbert Oude Essink Deltares/UU, The Netherlands More information: www.go-fresh.info
Gezette stappen sinds 2004 1. Analyseren zoetwaterproblematiek Zeeland 2. Identificeren kennishiaten 3. Onderzoek: watersysteem analyse, monitoring en modellering 4. Pilots ondergrondse zoetwaterberging GO-FRESH 5. Kartering zoet-zout verdeling in het grondwater (FRESHEM) 6. Opschalingskansen in de regio en daarbuiten 7. Showcases delen, regionaal, (inter)nationaal
Zoetwaterlandbouw in de zilte Zeeuwse Delta Hoogte maaiveld [m] Kreekrugsystemen Regenwaterlens drijvend op zout water
Onderzoek: watersysteem analyse, monitoring, modelleren Proefschriften: De Louw 2013 Pauw 2015
Modellen berekenen effecten droger klimaat en zeespiegelstijging op zoet-zout verdeling ondergrond, en indirect op gewasschade green is too salty to grow fresh crops
GO-FRESH: Local measures to increase fresh water supply Goal: Increasing fresh groundwater reservoirs in saline coastal areas Method: 3 Field tests: infiltration of freshwater in times of water surplus Present Future Dry Wet The Freshmaker Injection fresh water and extraction saline groundwater Drains2Buffer Smart deep drainage protects thin freshwater lens Creek Ridge Infiltration Test Elevation ground water level by infiltration surface water controlled level drainage
2012/2013: Starting up the three pilots: tubes, drains, pumps
The Principle of the FRESHMAKER (Zuurbier et al., 2014)
Drains2Buffer Increase rainwater lens volume to reduce root zone salinity Present Future
Increase of freshwater lens by active infiltration fresh surface water (Pauw et al., 2015) Before controlled artificial recharge and drainage system After natural recharge freshwater lens sea saline groundwater Pauw, P.S., van Baaren, E.S., Visser, M., de Louw, P.G.B., Oude Essink, G.H.P. (2015). Increasing a freshwater lens below a creek ridge using a controlled artificial recharge and drainage system: a case study in the Netherlands. Hydrogeology Journal. doi:10.1007/s10040-015-1264-z
Concept of CARD and pilot layout
Deepening freshwater lens due to higher groundwater level precipitation groundwater level freshwater lens fr. brackish saline
FRESHEM: zoet-zout kartering grondwater Zeeland Voorlopige resultaten FRESHEM onderzoeksprogramma (2014-2017)
Kartering zoet-brak-zout verdeling grondwater (FRESHEM)
Upscaling: potential and vulnerability maps at different scales Local scale 1342 ha 12% of agricultural land
Up-scaling: potential and vulnerability maps at different scales Very hopeful Hopeful Possible hopeful Not hopeful Out of salinity zone No information unfit fit highly potential not applicable Freshmaker Creek Ridge Infiltration DRAINS2BUFFER
Start opschalen showcases internationaal
Gezette stappen sinds 2004 1. Analyseren zoetwaterproblematiek Zeeland 2. Identificeren kennishiaten 3. Onderzoek: watersysteem analyse, monitoring en modellering 4. Pilots ondergrondse zoetwaterberging GO-FRESH 5. Kartering zoet-zout verdeling in het grondwater (FRESHEM) 6. Opschalingskansen in de regio en daarbuiten 7. Showcases delen, regionaal, (inter)nationaal
Met dank aan: Pier Vellinga Vincent Klap Lein Kaland
Vragen? Gualbert Oude Essink Deltares/UU, The Netherlands info: www.go-fresh.info More information: www.go-fresh.info Oude Essink, G.H.P., van Baaren, E.S., Zuurbier, K.G., Velstra, J., Veraart, J., Brouwer, W., Faneca Sànchez, M., Pauw, P.S., de Louw, P.G.B., Vreke, J., Schoevers, M. 2014. GO-FRESH: Valorisatie kansrijke oplossingen voor een robuuste zoetwatervoorziening, KvK 151/2014, ISBN EAN 978-94-92100-12-2, 84 p. Pauw, P.S., van Baaren, E.S., Visser, M., de Louw, P.G.B., Oude Essink, G.H.P. (2015). Increasing a freshwater lens below a creek ridge using a controlled artificial recharge and drainage system: a case study in the Netherlands. Hydrogeology Journal. doi:10.1007/s10040-015-1264-z