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Passive Pan Sampler for Vadose Zone Leachate Collection

^a Dep. of Soil Science, College of Agriculture, Shahid Chamran University, Ahwaz, Iran
^b Ins. of Genetics and Development Biology, Chinese Academy of Sciences, Shijiazhuang, China

View larger version (51K): [in a new window]   Fig. 1. Schematic representation of the soil columns with installed instruments.

View larger version (31K): [in a new window]   Fig. 2. Changes in matric potential measured by tensiometers and applied vacuum at low (LSWP) and high (HSWP) soil water potentials. T = tensiometer, and denotes stand for the tensiometer number.

View larger version (31K): [in a new window]   Fig. 3. The cumulative leachate collection (CLC) of the passive pan sampler, suction cup lysimeter, and the free drainage measured at low initial soil water potential (LSWP). Bars indicate the standard deviation of means.

View larger version (31K): [in a new window]   Fig. 4. The cumulative leachate collection (CLC) of the passive pan sampler, suction cup lysimeter, and the free drainage measured at high initial soil water potential (HSWP). Bars indicate the standard deviation of means.