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A study on biodiversity conservation in sea coastal areas using porous concrete



Title: A study on biodiversity conservation in sea coastal areas using porous concrete
Author(s): M. Yoshida
Paper category : conference
Book title: RILEM International Symposium on Environment-Conscious Materials and Systems for Sustainable Development
Editor(s): N. Kashino and Y. Ohama
Print-ISBN: 2-912143-55-1
e-ISBN: 2912143640
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 313 - 320
Total Pages: 8
Nb references: 3
Language: English


Abstract: This paper presents proposals for seaweed bed creation using porous concrete mixed with granular fertilizer. Granular fertilizer is composed of dissolved nutrients, which are useful for the growth of algae in the long term. Test plates were installed in an experimental sea area in order to evaluate the effectiveness of porous concrete mixed with granular fertilizer. Three kinds of material were used, namely porous concrete, porous concrete mixed with fertilizer, and ordinary concrete. The experimental term was two years from September 1999 to October 2001, and adherence of algae on the test plates was observed. The result of the experiment was that most adhesion of seaweed occurred in porous concrete mixed with granular fertilizer. New type blocks made of porous concrete mixed with granular fertilizer were applied in two sea areas. In an investigation after 1 year, it was confirmed that the blocks were inhabited by many organisms. Finally, chlorophyll-a distribution of the sea surface in KUSHIRO bay was estimated using observation data from an artificial satellite. The information was evaluated and its application to management of seaweed bed creation is described.


Online publication: 2004-11-24
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143640.037