Using Capacitance Sensors for the Continuous Measurement of the Water Content in the Litter Layer of Forest Soil

Figure 2

The relationship between the LWC method’s output voltage and the gravimetric water content (WC_weight) of the leaves attached to the sensors. Circles show the data collected with the LWC_5 method (𝑛=77, 𝑦=12.725𝑥−3.4211, 𝑅²=0.940), where five Quercus serrata leaves were attached to the sensor with rubber bands. Squares show the data collected with the LWC_10 method (𝑛=66, 𝑦=8.0696𝑥−2.2298, 𝑅²=0.942), which used ten Quercus serrata leaves.