Hydro-Lysimeter

The cylindrical stainless steel monolithic lysimeter has a surface of 1 square meter and a monolith depth of 1 meter.
Due to the high resolution weighing system the input water fractions are measured with a resolution of
0.01 mm, including dew, rime and small rates of evapotranspiration.
To receive the congruent field drainage the lysimeter’s suction cup rake at 90 cm is evacuated according to the field water tension which is measured in 90 cm depth with an external tensiometer. If the field soil is recharged by groundwater the lysimeter will be recharged as well.
The drainage water measurement by a second load cell system enables high resolution and a one month stand alone operation by siphon technique.

Typical Applications

• Measurement of ET and ETo, precipitation and leachate for determination of groundwater recharge capacities.

Advantages

• Determination of the soil water parameters and their interfaces to atmosphere and aquifer
• Input: Rain as true amount of water reaching the soil surface, as well as dew, rime and the water equivalent
  of snowfall
• Output: Evapotranspiration, ETo at locations with wet grassland, leachate rates

Limitations

• Not suitable for slopes or in forests
• Snow needs to be cut along the gap before icing to maintain the weighing capability
• Not for agri-cultivation applications

Technical Information

Included in Delivery

• Complete lysimeter as described in the text
• with Sensors and leachate components
• Service well with enclosed data logger DT80
• Model for ET, ETo and groundwater recharge