Study on Sampling Method of Rainfall, Throughfall, and Stemflow to Monitor the Effect of Acid Deposition on Forest Ecosystem |
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Authors: | Motonori Tamaki Takatoshi Hiraki Yoshihiro Nakagawa Tomiki Kobayashi Masahide Aikawa Mitsuru Shoga |
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Institution: | 1. The Hyogo Prefectural Institute of Environmental Science, Yukihira-cho, Suma-ku, Kobe; Hyogo, 654-0037, Japan 2. Toyooka Health Center, Saiwai-cho, Toyooka, Hyogo, 668-0025, Japan
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Abstract: | 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, NH4 +- and NO3 ?- 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% (mean). The three samplers (shampoo-hat, vinyl chloride tube, and gauze type) were used for stemflow sampling. Collection efficiency of the samplers was in the order of shampoo-hat> vinyl chloride tube> gauze and that of the gauze type varied significantly with rainfall condition. |
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