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Alaria crassifolia

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Masafumi Saito – One of the best experts on this subject based on the ideXlab platform.

  • new type units for artificial reef development of eco friendly artificial reefs and the effectiveness thereof
    30th PIANC-AIPCN Congress 2002, 2002
    Co-Authors: Norikazu Hirose, Akira Watanuki, Masafumi Saito

    Abstract:

    New type units named Aquareef have been developed to act as an artificial reef. The new units when in place have not only excellent stability and good wave dissipation function but also include large complex spaces. These empty spaces act to allow solar light to penetrate through onto the gravel mound below to offer a good seaweed environment. We looked into the hydraulic properties of the unit type-artificial reef using varied hydraulic model tests. We also investigated the biological functions through investigation of biota. Hydraulic model tests as to transmitted wave height, the character of wave force and sliding of the artificial reef body were performed. Charts were produced to provide for the number of rows of units decided by transmitted waves and decisions on stability as part of a design method. The wave transmission coefficient was almost the same as in the hydraulic model tests. In the attached organisms investigation, Laminaria angustata and Alaria crassifolia dominated on units and seaweed were observed on the rubble. Standing crops of seaweed on units were 27 times that for normal foot protection blocks. This site is in a barren ground region of the Japan Sea in Hokkaido. 2 years after construction, Sargassum patens and Laminaria ochotensis were seem in abundance. 2 years after construction, a two layer zonation provided a habitat for such as Pachymeniopsis lanceolata on the upper zone and Ulva pertusa on the lower zone of the units dominating. Crassostrea nipponica attached to the whole unit and abalone attached from the rubble area under one unit to the lower zone of the unit. Ecklonia cava was observed on the rubble and inside the unit while Sargassum sp. was observed on the flat phase of the lower zone of the unit. Acamthopagrus schlegeli and Girella punctata were observed to shoal around the unit.

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  • new type units for artificial reef development of eco friendly artificial reefs and the effectiveness thereof
    30th PIANC-AIPCN Congress 2002, 2002
    Co-Authors: Norikazu Hirose, Akira Watanuki, Masafumi Saito

    Abstract:

    New type units named Aquareef have been developed to act as an artificial reef. The new units when in place have not only excellent stability and good wave dissipation function but also include large complex spaces. These empty spaces act to allow solar light to penetrate through onto the gravel mound below to offer a good seaweed environment. We looked into the hydraulic properties of the unit type-artificial reef using varied hydraulic model tests. We also investigated the biological functions through investigation of biota. Hydraulic model tests as to transmitted wave height, the character of wave force and sliding of the artificial reef body were performed. Charts were produced to provide for the number of rows of units decided by transmitted waves and decisions on stability as part of a design method. The wave transmission coefficient was almost the same as in the hydraulic model tests. In the attached organisms investigation, Laminaria angustata and Alaria crassifolia dominated on units and seaweed were observed on the rubble. Standing crops of seaweed on units were 27 times that for normal foot protection blocks. This site is in a barren ground region of the Japan Sea in Hokkaido. 2 years after construction, Sargassum patens and Laminaria ochotensis were seem in abundance. 2 years after construction, a two layer zonation provided a habitat for such as Pachymeniopsis lanceolata on the upper zone and Ulva pertusa on the lower zone of the units dominating. Crassostrea nipponica attached to the whole unit and abalone attached from the rubble area under one unit to the lower zone of the unit. Ecklonia cava was observed on the rubble and inside the unit while Sargassum sp. was observed on the flat phase of the lower zone of the unit. Acamthopagrus schlegeli and Girella punctata were observed to shoal around the unit.

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Norikazu Hirose – One of the best experts on this subject based on the ideXlab platform.

  • new type units for artificial reef development of eco friendly artificial reefs and the effectiveness thereof
    30th PIANC-AIPCN Congress 2002, 2002
    Co-Authors: Norikazu Hirose, Akira Watanuki, Masafumi Saito

    Abstract:

    New type units named Aquareef have been developed to act as an artificial reef. The new units when in place have not only excellent stability and good wave dissipation function but also include large complex spaces. These empty spaces act to allow solar light to penetrate through onto the gravel mound below to offer a good seaweed environment. We looked into the hydraulic properties of the unit type-artificial reef using varied hydraulic model tests. We also investigated the biological functions through investigation of biota. Hydraulic model tests as to transmitted wave height, the character of wave force and sliding of the artificial reef body were performed. Charts were produced to provide for the number of rows of units decided by transmitted waves and decisions on stability as part of a design method. The wave transmission coefficient was almost the same as in the hydraulic model tests. In the attached organisms investigation, Laminaria angustata and Alaria crassifolia dominated on units and seaweed were observed on the rubble. Standing crops of seaweed on units were 27 times that for normal foot protection blocks. This site is in a barren ground region of the Japan Sea in Hokkaido. 2 years after construction, Sargassum patens and Laminaria ochotensis were seem in abundance. 2 years after construction, a two layer zonation provided a habitat for such as Pachymeniopsis lanceolata on the upper zone and Ulva pertusa on the lower zone of the units dominating. Crassostrea nipponica attached to the whole unit and abalone attached from the rubble area under one unit to the lower zone of the unit. Ecklonia cava was observed on the rubble and inside the unit while Sargassum sp. was observed on the flat phase of the lower zone of the unit. Acamthopagrus schlegeli and Girella punctata were observed to shoal around the unit.

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  • new type units for artificial reef development of eco friendly artificial reefs and the effectiveness thereof
    30th PIANC-AIPCN Congress 2002, 2002
    Co-Authors: Norikazu Hirose, Akira Watanuki, Masafumi Saito

    Abstract:

    New type units named Aquareef have been developed to act as an artificial reef. The new units when in place have not only excellent stability and good wave dissipation function but also include large complex spaces. These empty spaces act to allow solar light to penetrate through onto the gravel mound below to offer a good seaweed environment. We looked into the hydraulic properties of the unit type-artificial reef using varied hydraulic model tests. We also investigated the biological functions through investigation of biota. Hydraulic model tests as to transmitted wave height, the character of wave force and sliding of the artificial reef body were performed. Charts were produced to provide for the number of rows of units decided by transmitted waves and decisions on stability as part of a design method. The wave transmission coefficient was almost the same as in the hydraulic model tests. In the attached organisms investigation, Laminaria angustata and Alaria crassifolia dominated on units and seaweed were observed on the rubble. Standing crops of seaweed on units were 27 times that for normal foot protection blocks. This site is in a barren ground region of the Japan Sea in Hokkaido. 2 years after construction, Sargassum patens and Laminaria ochotensis were seem in abundance. 2 years after construction, a two layer zonation provided a habitat for such as Pachymeniopsis lanceolata on the upper zone and Ulva pertusa on the lower zone of the units dominating. Crassostrea nipponica attached to the whole unit and abalone attached from the rubble area under one unit to the lower zone of the unit. Ecklonia cava was observed on the rubble and inside the unit while Sargassum sp. was observed on the flat phase of the lower zone of the unit. Acamthopagrus schlegeli and Girella punctata were observed to shoal around the unit.

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Akira Watanuki – One of the best experts on this subject based on the ideXlab platform.

  • new type units for artificial reef development of eco friendly artificial reefs and the effectiveness thereof
    30th PIANC-AIPCN Congress 2002, 2002
    Co-Authors: Norikazu Hirose, Akira Watanuki, Masafumi Saito

    Abstract:

    New type units named Aquareef have been developed to act as an artificial reef. The new units when in place have not only excellent stability and good wave dissipation function but also include large complex spaces. These empty spaces act to allow solar light to penetrate through onto the gravel mound below to offer a good seaweed environment. We looked into the hydraulic properties of the unit type-artificial reef using varied hydraulic model tests. We also investigated the biological functions through investigation of biota. Hydraulic model tests as to transmitted wave height, the character of wave force and sliding of the artificial reef body were performed. Charts were produced to provide for the number of rows of units decided by transmitted waves and decisions on stability as part of a design method. The wave transmission coefficient was almost the same as in the hydraulic model tests. In the attached organisms investigation, Laminaria angustata and Alaria crassifolia dominated on units and seaweed were observed on the rubble. Standing crops of seaweed on units were 27 times that for normal foot protection blocks. This site is in a barren ground region of the Japan Sea in Hokkaido. 2 years after construction, Sargassum patens and Laminaria ochotensis were seem in abundance. 2 years after construction, a two layer zonation provided a habitat for such as Pachymeniopsis lanceolata on the upper zone and Ulva pertusa on the lower zone of the units dominating. Crassostrea nipponica attached to the whole unit and abalone attached from the rubble area under one unit to the lower zone of the unit. Ecklonia cava was observed on the rubble and inside the unit while Sargassum sp. was observed on the flat phase of the lower zone of the unit. Acamthopagrus schlegeli and Girella punctata were observed to shoal around the unit.

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  • new type units for artificial reef development of eco friendly artificial reefs and the effectiveness thereof
    30th PIANC-AIPCN Congress 2002, 2002
    Co-Authors: Norikazu Hirose, Akira Watanuki, Masafumi Saito

    Abstract:

    New type units named Aquareef have been developed to act as an artificial reef. The new units when in place have not only excellent stability and good wave dissipation function but also include large complex spaces. These empty spaces act to allow solar light to penetrate through onto the gravel mound below to offer a good seaweed environment. We looked into the hydraulic properties of the unit type-artificial reef using varied hydraulic model tests. We also investigated the biological functions through investigation of biota. Hydraulic model tests as to transmitted wave height, the character of wave force and sliding of the artificial reef body were performed. Charts were produced to provide for the number of rows of units decided by transmitted waves and decisions on stability as part of a design method. The wave transmission coefficient was almost the same as in the hydraulic model tests. In the attached organisms investigation, Laminaria angustata and Alaria crassifolia dominated on units and seaweed were observed on the rubble. Standing crops of seaweed on units were 27 times that for normal foot protection blocks. This site is in a barren ground region of the Japan Sea in Hokkaido. 2 years after construction, Sargassum patens and Laminaria ochotensis were seem in abundance. 2 years after construction, a two layer zonation provided a habitat for such as Pachymeniopsis lanceolata on the upper zone and Ulva pertusa on the lower zone of the units dominating. Crassostrea nipponica attached to the whole unit and abalone attached from the rubble area under one unit to the lower zone of the unit. Ecklonia cava was observed on the rubble and inside the unit while Sargassum sp. was observed on the flat phase of the lower zone of the unit. Acamthopagrus schlegeli and Girella punctata were observed to shoal around the unit.

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