A strong diurnal regime in water levels (maximum range 10 cm) was discovered by pressure transducers programmed to measure water levels at high frequency. The wetland site is a restored wet grassland floodplain in a clay basin. These water table fluctuations are used to estimate evaporative loss from the soil profile assuming constant head recovery, and compared to actual evaporation measurements derived from eddy correlation-energy budget methods. The former performed well on dry days with a strong diurnal regime, and information gained from high temporal resolution monitoring improved hydrological understanding of the wetland considerably.
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