Legend:

- Water level is derived from the pressure (relative to the air pressure) of the water column above the sensor

- T water is the temperature of water measured by the bottom water level sensor

- T Air is the air temperature measured inside the hut

- Air pressure is barometric pressure measured inside the hut

- Gas pressure is pressure of the gas in the wellhead measured by differential sensor relatively to the air pressure

- Flow is measured by the Ritter gas counter

- Bubbles corresponds to volumetric portion of gas bubbles in water derived from difference in water pressures No. 2 and 3

Legend

a: Station reconstruction

b: Local flood

c: Replacement of the water level sensor

d: Sensor malfunction