English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

These days, the conservation of ecosystem or biodiversity has become a social demand. It is therefore getting more important to predict how ecosystem will be influenced by civil engineering works. This is a report on an investigation of the influence of dam operation upon benthos community in the lower stream of dams.What can be observed by comparing the river bed between the lower stream of the dams and other rivers without dams is the difference in the composition of the bed materials. In the lower stream of the dams the base rock is exposed and large seized stones on the river bed are dominant. It may be considered that the exposure of the base rock is due to the prevention of stones by dams from flowing down dams and that the dominacy of the large sized stones is due to the stability of stream. The diffrence in the benthos community is also observed. The more the base rock is exposed, the less species of Ecdyonuridae live and the less the small and medium sized stones exist, the less the mass of Ephemerellidae is.One the basis of this investigation, problems about environmental impact assessment are also discussed.

THE INFLUENCE OF DAM OPERATION UPON THE RIVER BED AND THE BENTHOS COMMUNITY IN THE LOWER STREAM AND PROBLEMS ABOUT ENVIRONMENTAL IMPACT ASSESSMENT