書誌事項
- タイトル別名
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- Verification of Convergency of the Specific Discharges of Materials Measured at a Small Experimental Forested-Watershed
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説明
In the previous paper, the loading rates of TN and TP were measured in Aburahi-S Experimental Forested Watershed (AsEFW; 3.34 ha), and the specific loads (Lss) were evaluated to be 9.95 and 0.168 kg·ha-1·y-1, respectively. The Ls values should be verified to converge within AsEFW in order to be appreciable as parameters characterizing AsEFW. However, it is difficult to install a sufficient number of weirs in such a small watershed to prove directly such convergence. In this paper, water samples of the baseflow were taken up monthly at twelve sites (R0-R7 and L1-L4) located upstream of the weir (R0) of AsEFW for one year. The average concentrations of the nutrients at R0 did not significantly differ (p<0.01) from those at R1-R4 within a distance of 130 m. During two rainfall events (58.5 and 151 mm), the concentrations were observed at R0, R1 and R3. The concentration levels and changing patterns were similar between R0 and these upstream sites. It was concluded, from these results, that the Ls values converge within AsEFW. Since springs may affect significantly Ls values, especially in small watersheds, their existence and effect should be checked. A small spring (L5) was found in AsEFW, and its influence on the Ls values of the nutrients was confirmed to be negligible.
収録刊行物
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- 水環境学会誌
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水環境学会誌 33 (10), 167-174, 2010
公益社団法人 日本水環境学会
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詳細情報 詳細情報について
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- CRID
- 1390001205080172800
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- NII論文ID
- 130000435496
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- ISSN
- 18813690
- 09168958
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
