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 Irrigation Hydrology Fluxes of Water and Solutes Agronomy Soilscience in Soils Botany Meteorology Landscape Studies 27.03.2013
• Introduction • Technique • Example • Data management 27.03.2013
Lysimeters Coshocton, Ohio 1937 27.03.2013
But, how in soils? „ Panta Rhei! “ „ All is in a state of flux “ Heraklit, 550 – 480 a.D. 27.03.2013
Field setups, but … 27.03.2013 20 Ja hre Wa g na 7
Fluxes F1 Defined cross-section Defined length 27.03.2013 20 Ja hre Wa g na 8
F2 Atmospheric Interface: Any kind of precipitation Any kind of rain, hail, dew, Snow, hoar frost, … 27.03.2013 20 Ja hre Wa g na 9
F3 Infiltration & Soil water flux 10
F4 Groundwater recharge in wet seasons/snow melt, Positive water balance 11
F5 For gravimetric lysimeters: Groundwater = Zero Potential Lysim. Bottom = Zero Potential 12
Fm 6 Capillar flux Dry seasons / Negative water balance Lysimeter getting to dry Due to missing connection to groundwater. 13
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 14
F8 We need to control the lower boundary condition to reach true hydraulic field situations in lysimeters 15
• Introduction • Technique • Example • Data management 27.03.2013
F9 27.03.2013
F10 Suction cup rake in big lysimeters 27.03.2013
F11 Suction cups In smart field lysimeters 27.03.2013
Field setup 27.03.2013
Field Lysimeter • Best results • Heavy machines • Long planning • Higher expense Lysimeter Station TERENO 1m² Lysimeter 27.03.2013
Smart Field Lysimeter • 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 27.03.2013
Smart Field Lysimeters twin, triple, quattro 27.03.2013
Smart Field Lysimeter • Small setup Full function • • No machines • Flexible to demand • Easy installation • Low expense 27.03.2013
• Introduction • Technique • Example • Data management 27.03.2013
Installation in the alps Soil column cutting with jack lift device Minimum impact 27.03.2013
Installation in the alps Lysimeter site at Italian alps Lysimeter suited 27.03.2013
• Introduction • Technique • Example • Data management 27.03.2013
Data management Data download and backup Data Pre Processing 27.03.2013
Qua lity c he c k proc e dure s 27.03.2013 No . 30
Quality check procedures 27.03.2013 No . 31
Quality check procedures 27.03.2013 No . 32
Quality check procedures 27.03.2013 No . 33
Data processing 27.03.2013
Evaporation & Precipitation 27.03.2013
Mass balances Inj. = applied Bromid, V = vegetation loss, L = leachate, delta M (S) = Change of Mass, P = Precipitation, D = Drainage 27.03.2013
Thank you! 27.03.2013
Recommend
More recommend