近自然水路工法におけるトミヨの生息 Effect of an eco-friendly rehabilitation of a channel on Pungitius sinensis

この論文にアクセスする

この論文をさがす

著者

抄録

近年、自然環境に対する社会的関心が高まり、河川・水路の果すべき治水・利水等の機能の維持と自然環境を調和させた、生物のすみ易い近自然工法が注目されている。ところが、近自然工法が適用されても、施工後その効果の追跡調査が十分行われていないので、その工法が適正であったかどうかは数量的にはわからない場合が多い。本研究では、玄手川の水路底が水環境整備事業によって新しい工法で施工された後、従来のトミヨがどれだけ回復したかを明らかにした。

The Gente rier, 3km in length and with a 5.1m-wide botton, is a drainage channel for the farming area on wither side of it. For rehabilitaiton of tis weeds-rampant soil riverbed, an eco-friendly construction design wa adopted for the dual benefit of facilitating waterweeds control and minimizing damage to aquatic life. Specifically, in constructions sectionally implemented over several consecutive years, 80% of its soil bottom was lined alternately with flat blocks and cobble-filled blocks. This study was aimed at tracking how aquatic life fared after the rehabilitaiton of the channel. Firstly, we conducted a three-year survey of the inhabitant fish species pungitius sinensis, locally calle Tomiyo, with observation codrats installed alongside the right revetment for the 3-to 7-year-old target rehabilitated areas in an 800m-kong middle reach of the channel. The survey showed that the density of Tomiyo inhabitation of the waterweeds was 0.30 fish/m_2 in April and 1.16 fish/m_2 in September. Another survey revealed that in the five-year-old rehabilitated area the waterweeds community had virtually regained both its pre-rehabilitation climax with the Sparfanium japoicum, locally called Nagaemikuri, as the predominant plant species and its pre-rehabilitation composition ratios and coverage rates. From these results we might conclude that several years after the application of this new semi-natural technology to its bottom-lining the channel had regained a natural water environment that allowed the restoration of the aquatic plants and animals.

収録刊行物

  • 富山県立大学紀要

    富山県立大学紀要 15, 105-110, 2005-03-31

    富山県立大学

被引用文献:  1件中 1-1件 を表示

  • 玄手川の近自然工法の総合評価

    広瀬 慎一 , 瀧本 裕士

    水土の知 : 農業農村工学会誌 : journal of the Japanese Society of Irrigation, Drainage and Rural Engineering 76(8), 721-724, 2008-08-01

    参考文献10件 被引用文献2件

各種コード

  • NII論文ID(NAID)
    110004625819
  • NII書誌ID(NCID)
    AN10358595
  • 本文言語コード
    JPN
  • 資料種別
    雑誌論文
  • 雑誌種別
    大学紀要
  • ISSN
    09167633
  • NDL 記事登録ID
    7793962
  • NDL 雑誌分類
    ZV1(一般学術誌--一般学術誌・大学紀要)
  • NDL 請求記号
    Z22-1659
  • データ提供元
    CJP引用  NDL  NII-ELS 
ページトップへ