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De c a g on We bina r Sma rt F ie ld L ysime te rs, why a nd how do the y work?
Georg von Unold
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Soil Water & Interfaces
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De c a g on We bina r Sma rt F ie ld L ysime te rs, why a nd how - - PowerPoint PPT Presentation
De c a g on We bina r Sma rt F ie ld L ysime te rs, why a nd how - - PowerPoint PPT Presentation
De c a g on We bina r Sma rt F ie ld L ysime te rs, why a nd how do the y work? Georg von Unold 27.03.2013 Soil Water & Interfaces 27.03.2013 Fields of Applikation Water Ressources Management Plant Production Climate Change
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Soilscience Botany Climate Change Hydrology Water Ressources Management Irrigation Plant Production
Fluxes
- f
Water and Solutes in Soils
Agronomy Landscape Studies Meteorology
Fields of Applikation
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- Introduction
- Technique
- Example
- Data management
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Coshocton, Ohio 1937
Lysimeters
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But, how in soils?
„ Panta Rhei! “ „All is in a state of flux“ Heraklit, 550 – 480 a.D.
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Field setups, but …
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Fluxes F1
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Defined cross-section Defined length
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Atmospheric Interface: Any kind of precipitation Any kind of rain, hail, dew, Snow, hoar frost, …
F2
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Infiltration & Soil water flux
F3
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Groundwater recharge in wet seasons/snow melt, Positive water balance
F4
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For gravimetric lysimeters: Groundwater = Zero Potential
- Lysim. Bottom = Zero Potential
F5
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Capillar flux Dry seasons / Negative water balance Lysimeter getting to dry Due to missing connection to groundwater.
Fm 6
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Fm 7
Fluxes are potential driven. Field matrix potential needs to be lysimeter matrix potential. We need to measure field condition and need to transmitt it into lysimeters
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We need to control the lower boundary condition to reach true hydraulic field situations in lysimeters
F8
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- Introduction
- Technique
- Example
- Data management
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F9
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F10
Suction cup rake in big lysimeters
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F11
Suction cups In smart field lysimeters
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Field setup
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TERENO 1m² Lysimeter
- Best results
- Heavy machines
- Long planning
- Higher expense
Lysimeter Station
Field Lysimeter
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- Undisturbed samples
- Soil column 30 cm, 60 cm, 100 cm
- Lower boundary control
- Precise weighing system
- Monitoring of water fluxes
- Water sampling
- Easy maintanance
- Easy removable
SFL, design
Smart Field Lysimeter
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Smart Field Lysimeters twin, triple, quattro
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- Small setup
- Full function
- No machines
- Flexible to demand
- Easy installation
- Low expense
Smart Field Lysimeter
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- Introduction
- Technique
- Example
- Data management
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Soil column cutting with jack lift device Minimum impact
Installation in the alps
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Lysimeter suited Lysimeter site at Italian alps
Installation in the alps
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- Introduction
- Technique
- Example
- Data management
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Data download and backup Data Pre Processing
Data management
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Qua lity c he c k proc e dure s
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Quality check procedures
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Quality check procedures
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Quality check procedures
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Data processing
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Evaporation & Precipitation
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Mass balances
- Inj. = applied Bromid, V = vegetation loss, L = leachate, delta M (S) = Change of Mass, P = Precipitation, D = Drainage
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