Study on sampling method of rainfall, Throughfall, and stemflow to monitor the effect Of acid deposition on forest ecosystem

摘要

The use of samplers for rainfall, throughfall, and stemflow was studied in Chamaecyparis obtusa forest in Kobe to develop a suitable simplified collection method For long-term monitoring of the effect of acid deposition on the forest ecosystem. A Filtrating bulk sampler, widely used in Japan due to its convenience, was modified for Rainfall-and throughfall-sampling. The pH value, NH~+ _4-and NO~- _3-concns. did not Change within a two-week sampling period, and the collection efficiency of the modified Type relative to the wet/dry sampler was 97 /100 (mean).