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Samenvatting Bodemkunde | Water in de bodem | Hogeschool Gent | 2025/26

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Uitgebreide studiestof voor Hoofdstuk 4 Bodemkunde aan Hogeschool Gent, gericht op de Agro- en Biotechnologie opleiding Voedingstechnologie. De stof behandelt waterbalans, capillaire krachten, pF-curven, veldcapaciteit, verwelkingspunt en de praktische betekenis van bodemwater voor cultivatie en plantenwortels. Dit materiaal helpt je snel de kernconcepten onder de knie te krijgen en voorbereidt op examens met duidelijke uitleg van moeilijke begrippen zoals capillaire stijghoogte en bodemvochtkarakteristiek.

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Bodemkunde Water In De Bodem



Hoofdstuk 4: water in de bodem
Inhoud
1.1 Waterbalans........................................................................................2
1.2 pF-curven............................................................................................3
1.3 Bodemkenmerken door water.............................................................6
1.4 Draineringsklassen.............................................................................7




1

, Bodemkunde Water In De Bodem


1.1 Waterbalans
Planetaire waterbalans:

20% van onze zoetwatervoorraad zit in onze bodem

 Planetair is er slechts <3% zoet water
 Hiervan zit er ca.20% in de bodem, waarvan slechts de helft relevant
voor vegetatie/ cultivatie

Bodemwaterbalans= input-output

Osmose breng t water binnenin wortelcellen en dan
opwaarts

Krachten op water in de bodem

 Zuigkracht van de wortels
 Verdamping van bodemvocht
 Adhesie of zwelwater
 Hydratiatiemantel (water rond ionen)
 Zwaartekracht
 Capillaire kracht (beperkt in grote poriën

Water in het bodemprofiel

 Grondwaterzone: water in alle poriën => permanente
reductie
 Capillaire zone: waar capillaire krachten werken
 Hangwaterzone: poriën groter, waterbergingsporiën,
aan (KHC) klevingswater

Capillaire kracht en zone

 Capillaire kracht (exp.: adhesie + cohesie)
o Klei > leem > zand
 Capillaire stijghoogte en - snelheid
 Gesloten en open capillaire zone

Capillair water beweegt

 KLEIgrond: hoog + traag
 ZANDgrond: laag + snel
 LEEMgrond: meest bruikbaar




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July 21, 2026
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Written in
2025/2026
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