1. Anticipating on amplifying water stress
Optimal crop production supported by
climate-adaptive water management
R.P. Bartholomeus,Vienna,April 14th 2015
Ruud P. Bartholomeus
Gé v.d. Eertwegh
Gijs Simons

2. The climate is changing
• Temperature ↑
• CO2 ↑
• Extreme precipitation ↑
• Dry periods ↑
Anticipate on increased crop
damage
INCREASED DROUGHTANDWATERLOGGING
Climate adaptive water management

3. Climate Adaptive Drainage
Anticipate using dynamic water management
- Local scale
- Online steering
- www.futurewater.nl/uk/projects/climate-adaptive-drainage/
CLIMATEADAPTIVE DRAINAGE -WWW.FUTUREWATER.NL
Climate adaptive water management

4. Climate Adaptive Drainage
Anticipate using dynamic water management
- Local scale
- Online steering
- www.futurewater.nl/uk/projects/climate-adaptive-drainage/
Climate adaptive water management
CLIMATEADAPTIVE DRAINAGE –WWW.FUTUREWATER.NL

5. Climate Adaptive Drainage
Anticipate using dynamic water management
- Local scale
- Online steering
Goal: Process-based steering algorithm for
CAD
Using:
• Soil-Water-Atmosphere-Plant model
(SWAP)
• Online groundwater level measurements
• Online soil moisture measurements
• 10-day weather forecasts
CLIMATEADAPTIVE DRAINAGE –WWW.FUTUREWATER.NL
Climate adaptive water management

6. soilplantatmosphere
processes that interact
between soil-plant-
atmosphere
Optimal soil moisture conditions for crop growth
Focus on processes
Climate adaptive water management

7. Soil moisture and crop growth
Drought and oxygen stress
- Drought stress: according to the ‘dry side’ of
Feddes et al. 1978
- Oxygen stress: according to Bartholomeus et
al. 2008 JOH
CALCULATION OF OXYGEN STRESS
Climate adaptive water management

8. Soil moisture and crop growth
Simulation - example
- Drought stress: according to the ‘dry side’ of
Feddes et al. 1978
- Oxygen stress: according to Bartholomeus et
al. 2008 JOH
Climate adaptive water management
SOIL MOISTUREAND OXYGEN CONDITIONSAND REDUCED
TRANSPIRATION

9. ‘Real-time’ predictions
Groundwater levels and soil moisture
Measurements used for:
- Model calibration
- Data assimilation
Climate adaptive water management
calibration
assimilation
VISSER ETAL. 2006, ADVANCES INWATER RESOURCES

10. Case study: Haaksbergen
Calibration/assimilation
Climate adaptive water management

11. Steering algorithm
(Extreme) example
- Based on 10-day weather forecasts
- Precipitation
- Temperature
- Global radiation
- Lower CAD-crest to prevent oxygen stress
- Raise CAD-crest to limit unnecessary drainage
Climate adaptive water management
Rain [mm/d]
Drainage and crest level [cm+s.s.]
Groundwater level [cm+s.s.]
Moisture content [-] -10 cm+s.s.
Drainage [cm/d]
Oxygen stress (waterlogging) [cm/d]
prediction
optimization
optimization
optimization
optimization
optimization
prediction
prediction
prediction
prediction

12. Steering algorithm
Example 1998
- Based on 10-day weather forecasts
- Precipitation
- Temperature
- Global radiation
- Lower CAD-crest to prevent oxygen stress
- Raise CAD-crest to limit unnecessary drainage
Climate adaptive water management

13. Steering algorithm
Example 1998: simulations
- No steering: relative crop yield ~90%
- With steering: relative crop yield ~97%
Climate adaptive water management

14. Anticipating on amplifying water stress
To conclude
- Increased drought and waterlogging foreseen: Anticipate using climate adaptive technologies
- Climate Adaptive Drainage + online steering algorithm provides such a technological sollution
Climate adaptive water management
ruud.bartholomeus@kwrwater.nl
nl.linkedin.com/in/ruudbartholomeus