NL2030409B1 - Novel combined ecological seawall structure and manufacturing method thereof - Google Patents

Novel combined ecological seawall structure and manufacturing method thereof Download PDF

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NL2030409B1
NL2030409B1 NL2030409A NL2030409A NL2030409B1 NL 2030409 B1 NL2030409 B1 NL 2030409B1 NL 2030409 A NL2030409 A NL 2030409A NL 2030409 A NL2030409 A NL 2030409A NL 2030409 B1 NL2030409 B1 NL 2030409B1
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oyster
alloy
reefs
reef
alloy cage
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NL2030409A
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Dutch (nl)
Inventor
Tu Junhao
Zhong Huanyu
Liu Haolang
Wang Zhen
Tao Aifeng
Zhang Haiming
Xie Shuya
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Univ Hohai
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/046—Artificial reefs
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/70—Artificial fishing banks or reefs
    • A01K61/75—Artificial fishing banks or reefs floating
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Revetment (AREA)

Abstract

The combined ecological seawall structure comprises the oyster reef Bragg submerged breakwater wave—resisting structure at the offshore side and coastal wetland plants at the near—shore side; the coastal wetland. plants are located. in the intertidal zone 5 right behind the wave—resisting structure; the structure is composed. of a plurality of oyster reefs which are periodically arranged; in the transverse direction, the periodic extension direction of the oyster reefs is consistent with the direction of incident wave, the spacing distance between two adjacent reefs is 10 equal to the width of single reef, and the sum of the two is positive integer multiples of half of the wave length of the incident wave; in the longitudinal direction, the periodic extension direction of the reefs is perpendicular to the direction of the incident wave, and the spacing distance between two 15 adjacent reefs is not greater than half of the length of single oyster reef. (+ Fig. l)

Description

P885/NLpd
NOVEL COMBINED BCOLOGICAL SEAWALL STRUCTURE AND MANUFACTURING
METHOD THEREOF
TECHNICAL FIELD
The present disclosure relates to a novel combined ecological seawall structure and a manufacturing method thereof, and belongs to the technical field of ports and ocean engineering.
BACKGROUND ART
The coastal areas of China are densely populated and economi- cally developed, however, due to over-development and damage to the marine environment in the past, the offshore ecological envi- ronment is facing multiple pressures such as deterioration of wa- ter quality, hardening of coastal zone, and high-density popula- tion. Meanwhile, the coastal areas of China are facing severe coast erosion and a large amount of earth-rock loss, which severe- ly threatens the engineering facilities and ecological environment of the coastal area of China, and brings great influence on the production and life of people. Therefore, there is an urgent need to construct an ecological breakwater capable of preventing wave and protecting beach as well as protecting an ecological environ- ment. Submerged breakwater is an important engineering facility commonly used for preventing coast erosion, which can effectively weaken waves and reduce beach erosion. However, due to the fact that wave load borne by the top surface and the upper part of tra- ditional riprap submerged breakwater is large, a large protective surface structure needs Lo be adopted, special-shaped protective surface blocks are mostly used for wave blocking and wave dissipa- tion at present, but the special-shaped protective surface block is complex in construction process, unobvious in wave dissipation effect, prone to being damaged under extreme sea conditions such as typhoons or storm surges, and tedious in repair process. In ad- dition, the tradition riprap submerged breakwater is not conducive to exchange of water bodies at two sides of the submerged breakwa- ter due to high breakwater top, resulting in a certain impact on marine organism activity and the ecological environment. Coastal wetland plants play an important role of siltation promotion and beach fixation, soil and water conservation, wetlands ecosystem maintenance and protection and the like, and meanwhile, the coastal wetland plants also have the capacity of secondary wave dissipation and may be helpful to wave prevention and shore pro- tection. However, hydrodynamic environment of near-shore areas is not conducive to the growth and survival of seedlings of the coastal wetland plants. If no measures are taken to change the hy- drodynamic environment, it is difficult to use the way of planting the seedlings of the coastal wetland plants to provide ecological and wave prevention functions, while the transplanting of mature plants consumes a lot of resources and is uneconomical.
SUMMARY
A technical problem to be solved by the present disclosure is to overcome the defects in the prior art and to provide a novel combined ecological seawall structure and a manufacturing method of the novel combined ecological seawall structure. While the structure not only can improve wave dissipation capacity and ef- fectively protect the coast, but also can repair and protect near- shore ecological environment and maintain a near-shore ecological system.
To solve the technical problems, the technical solution pro- vided by the present disclosure is as follows: a novel combined ecological seawall structure comprises an oyster reef Bragg submerged breakwater wave-resisting structure at the offshore side and coastal wetland plants at the near-shore side; the coastal wetland plants are located in the intertidal zone right behind the oyster reef Bragg submerged breakwater wave- resisting structure; the oyster reef Bragg submerged breakwater structure is composed of a plurality of alloy cage oyster reefs which are periodically arranged; in the transverse direction, the periodic extension direction of the alloy cage oyster reefs is consistent with the direction of incident wave, and the alloy cage oyster reefs are discontinuousiy arranged perpendicular to the shoreline; in the longitudinal direction, the periodic extension direction of the alloy cage oyster reefs is perpendicular to the direction of the incident wave, and the alloy cage oyster reefs are discontinuously arranged along the shoreline.
Preferably, the spacing distance between two adjacent alloy cage oyster reefs in the transverse direction is equal to the width of single alloy cage oyster reef, and the sum of the two is positive integer multiples of half of the wavelength of the inci- dent wave.
Preferably, the spacing distance between two adjacent alloy cage oyster reefs in the longitudinal direction is not greater than half of the length of single alloy cage oyster reef.
Preferably, the alloy cage oyster reef comprises an alloy cage, the upper layer of the alloy cage is filled with oyster shells, and the lower layer is filled with natural block stones.
Preferably, local mangrove or salt marsh plants are selected for the coastal wetland plants according to local conditions, and the seedlings are big seedlings.
Preferably, the ratio of the height of the alloy cage oyster reef to water depth is greater than 0.1.
A manufacturing method of the novel combined ecological sea- wall structure, comprising the following steps: 501, acquiring data of incident wavelength L, wave height H and period T of wave and water depth h in the Larget sea area; 502, determining the size and the number of alloy cage oyster reef based on hydrological data acquired in $01, wherein the length and the number of the alloy cage oyster reef are determined according to the length of the target coast, the spacing distance between two adjacent alloy cage oyster reefs in the transverse di- rection is equal to the width of single alloy cage oyster reef, and the sum of the two is positive integer multiples of half of the wavelength of the incident wave, the spacing distance between two adjacent alloy cage oyster reefs in the longitudinal direction is not greater than half of the length of single alloy cage oyster reef, and the ratio of the height of the alloy cage oyster reef D to water depth h is greater than 0.1;
S03, filling natural block stones in the lower layer of an alloy cage, and filling oyster shells in the upper layer to manu-
facture an alloy cage oyster reef;
S04, periodically arranging the alloy cage oyster reefs manu- factured in the S03 in the target sea area. In the transverse di- rection, the extension direction of the alloy cage oyster reefs periodically arranged is consistent with the direction of incident wave, and the alloy cage oyster reefs are discontinuousiy arranged perpendicular to a shoreline; in the longitudinal direction, the extension direction of the alloy cage oyster reefs periodically arranged is perpendicular to the direction of incident wave, and the alloy cage oyster reefs are discontinuously arranged along the shoreline; 505, transplanting seedlings of coastal wetland plants in the intertidal zone behind the oyster reef Bragg submerged breakwater structure arranged in S04.
The present disclosure has the beneficial effects that a nov- el combined seawall structure and a manufacturing method thereof provided is high in practicability, good in wave dissipation ef- fect and ecological significance; the oyster reef Bragg submerged breakwater structure is composed of a plurality of alloy cage oys- ter reefs periodically arranged, the periodic extension direction of the alloy cage oyster reefs in the transverse direction is con- sistent with the direction of incident wave, and the alloy cage oyster reefs in the transverse direction are discontinuously ar- ranged perpendicular to the shoreline; the periodic extension di- rection of the alloy cage oyster reefs in the longitudinal direc- tion is perpendicular to the direction of incident wave, and the alloy cage oyster reefs in the longitudinal direction are discon- tinuously arranged along the shoreline; the spacing distance be- tween the two adjacent alloy cage oyster reefs in the Lransverse direction is equal to the width of single alloy cage oyster reef, the sum of the two is positive integer multiples of half of the wave length of the incident wave, and the spacing distance between the two adjacent alloy cage oyster reefs in the longitudinal di- rection is not greater than half of the length of single alloy cage oyster reef. The oyster reef Bragg breakwater is arranged based on the Bragg resonance principle, a large amount of wave coming from the open sea can be reflected to the sea through Bragg resonance, the wave height behind the breakwater can be effective- ly reduced to achieve the effect of wave prevention and beach pro- tection. Meanwhile, after wave dissipation, a stable growth envi- ronment is provided for the coastal wetland plants in the inter- 5 tidal zone, the seedling survival rate of the coastal wetland plants is increased, and the effect of the ecological seawall is improved. In addition, due to low height of the oyster reef Bragg submerged breakwater, free exchange of water bodies and marine or- ganism activities cannot be damaged while the marine disaster pro- tection requirements are satisfied, the oyster reef can reduce the impact of artificial materials on the ecological environment, pro- tect the original ecology, and can also provide an attachment sur- face for the oysters at the bottom of the water, which is helpful to the restoration of an oyster reef ecosystem and provide ecolog- ical functions and services such as water purification, habitat provision, shoreline erosion prevention, and the like.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram of a side-view structure of the novel combined ecological seawall of the present disclosure;
FIG. 2 is a schematic diagram of a top-view structure of the novel combined ecological seawall of the present disclosure.
Reference numerals in the drawings are as follows: l-oyster reef Bragg submerged breakwater wave-resisting structure; 2-alloy cage; 3-oyster shell; 4-natural block stone; b-coastal wetland plant.
DETAILED DESCRIPTION OF THE EMBODIMENTS
The present disclosure is further descried below with refer- ence to the accompanying drawings, the following embodiments are only used for illustrating the technical solutions of the present disclosure more clearly rather than limiting the scope of protec- tion of the present disclosure.
As shown in FIG. 1 and FIG. 2, the present disclosure dis- closes a novel combined ecological seawall structure, comprising an oyster reef Bragg submerged breakwater wave-resisting structure 1 at the offshore side and coastal wetland plants 5 at the near-
shore side; the coastal wetland plants 5 are located in the inter- tidal zone right behind the oyster reef Bragg submerged breakwater wave-resisting structure 1; the oyster reef Bragg submerged break- water structure 1 is composed of a plurality of alloy cage oyster reefs periodically arranged. In the embodiment, it is preferred that the alloy cage oyster reefs are arranged in a 3x3 periodic arrangement in the transverse direction and the longitudinal di- rection, forming a total of nine submerged breakwaters.
In the transverse direction, the periodic extension direction of the alloy cage oyster reefs is consistent with the direction of incident wave, the alloy cage oyster reefs are discontinuously ar- ranged perpendicular to the shoreline, the spacing distance be- tween the two adjacent alloy cage oyster reefs is equal to the width of single alloy cage oyster reef, and the sum of the two is positive integer multiples of half of the wavelength of the inci- dent wave. In the longitudinal direction, the periodic extension direction of the alloy cage oyster reefs is perpendicular to the direction of the incident wave, the alloy cage oyster reefs are discontinuously arranged along the shoreline, and the spacing dis- tance between the two adjacent alloy cage oyster reefs is not greater than half of the length of single alloy cage oyster reef.
According to the Bragg resonance principle, the incident wave and the submerged breakwater are subjected to resonance reflec- tion, a large amount of incident wave energy is reflected to the sea, the height of the wave behind the breakwater is greatly re- duced, thus providing a stable growth environment for the coastal wetland plants in the intertidal zone; the survival rate of seed- lings of the coastal wetland plants is increased, the construction effect of the ecological seawall is improved, the height of the oyster reef submerged breakwater is small enough, free exchange of water bodies and marine organism activities cannot be damaged while marine disaster protection requirements are satisfied, the oyster reef can also provide an attachment surface for oysters at the bottom of the water, which is helpful to the restoration of an oyster reef ecological system, and provide ecological functions and services such as water purification, habitat provision, shore- line erosion prevention, and the like.
Preferably, the spacing distance between two adjacent alloy cage oyster reefs in the longitudinal direction is not greater than half of the length of single alloy cage oyster reef. In the embodiment, the spacing distance is 0.25 oyster reef length.
Preferably, local mangrove or salt marsh plants are selected for the coastal wetland plants 5 according to local conditions, and the seedlings are big seedlings.
Preferably, the ratio of the height of the alloy cage oyster reef to water depth is greater than 0.1.
The present disclosure further discloses a manufacturing method of a novel combined ecological seawall structure, compris- ing the following steps: step one, acquiring data of incident wavelength L, wave height H and period T of wave and water depth h in the target sea area; step two, determining the size and number of alloy cage oys- ter reef based on hydrological data acquired in the step one, wherein the length 1 and number of the alloy cage oyster reef are determined according to the length of the target coast, the spac- ing distance b2 between two adjacent alloy cage oyster reefs in the transverse direction is equal to the width bl of single alloy cage oyster reef, and the sum of the two is positive integer mul- tiples of half of the wavelength L of the incident wave, the spac- ing distance d between two adjacent alloy cage oyster reefs in the longitudinal direction is not greater than half of the length 1 of the alloy cage oyster reef, and the ratio of the height of the al- loy cage oyster reef D to water depth h is greater than 0.1; step three, filling natural block stones 4 in the lower layer of the alloy cage 2, and filling oyster shells 3 in the upper lay- er to manufacture an alloy cage oyster reef; step four, periodically arranging the alloy cage oyster reefs manufactured in the step three in the target sea area. In the transverse direction, the extension direction of the alloy cage oyster reefs periodicaliy arranged is consistent with the direc- tion of incident wave, and the alloy cage oyster reefs are discon- tinuously arranged perpendicular to the shoreline; in the longitu- dinal direction, the extension direction of the alloy cage oyster reefs periodically arranged is perpendicular to the direction of the incident wave, and the alloy cage oyster reefs are discontinu- ously arranged along the shoreline; and step five, transplanting seedlings of coastal wetland plants 5 in the intertidal zone behind the oyster reef Bragg sub- merged breakwater structure 1 arranged in the step four.
The manufacturing method and construction process of the oys- ter reef Bragg submerged breakwater structure provided by the pre- sent disclosure are simple, the application range is wide, and the practical value and the ecological benefit are both achieved.
The foregoing is merely preferred embodiments of the present disclosure, and it should be noted that several improvements and modifications may also be made to those of ordinary skill in the art without departing from the principles of the present disclo- sure, and these improvements and modifications should also be con- sidered to be within the scope of protection of the present dis- closure.

Claims (7)

CONCLUSIESCONCLUSIONS 1. Gecombineerde ecologische zeeweringstructuur, omvattende een oesterrif op een op basis van Bragg reflectie werkende ondergedom- pelde golfbreker constructie (1) aan de offshore-zijde en kustwet- landplanten (5) aan de kust-zijde; waarbij de kustwetlandplanten (5) zich bevinden in de intergetijdenzone direct achter het oes- terrif op een op basis van Bragg reflectie werkende ondergedompel- de golfbreker constructie (1); waarbij het oesterrif op een op ba- sis van Bragg reflectie werkende ondergedompelde golfbreker con- structie (1) is samengesteld uit een veelvoud aan oesterriffen van gelegeerde kooien die periodiek zijn gerangschikt; waarbij in de transversale richting de periodieke verlengingsrichting van de oesterriffen van de legeringkooien consistent is met de richting van de invallende golf, en de oesterriffen van de legeringskooien op onderbroken wijze loodrecht op de kustlijn zijn gerangschikt; waarbij in de lengterichting de periodieke uitstrekkingsrichting van de oesterriffen van de legeringskooien loodrecht op de rich- ting van de invallende golf staat, en de oesterriffen van de lege- ringskooien discontinu zijn gerangschikt langs de kustlijn.Combined ecological seawall structure, comprising an oyster reef on a submerged breakwater structure (1) operating on the offshore side based on Bragg reflection and coastal wetland plants (5) on the coastal side; wherein the coastal wetland plants (5) are located in the intertidal zone immediately behind the oyster reef on a Bragg reflection submerged breakwater structure (1); wherein the oyster reef on a Bragg reflection submerged breakwater structure (1) is composed of a plurality of oyster reefs of alloy cages arranged periodically; in the transverse direction, the periodic extension direction of the oyster reefs of the alloy cages is consistent with the direction of the incident wave, and the oyster reefs of the alloy cages are arranged perpendicular to the shoreline in a discontinuous manner; wherein in the longitudinal direction, the periodic direction of extension of the oyster reefs of the alloy cages is perpendicular to the direction of the incident wave, and the oyster reefs of the alloy cages are discontinuously arranged along the shoreline. 2. Gecombineerde ecologische zeeweringconstructie volgens conclu- sie 1, waarbij de afstand tussen twee aangrenzende oesterriffen van gelegeerde kooien in de transversale richting gelijk is aan de breedte van een enkel oesterrif van een legeringskooi, en de som van de twee positieve gehele veelvouden van de helft van de golf- lengte van de invallende golf is.A combined ecological seawall structure according to claim 1, wherein the distance between two adjacent alloy cage oyster reefs in the transverse direction is equal to the width of a single alloy cage oyster reef, and the sum of the two positive integer multiples of half of the wavelength of the incident wave. 3. Gecombineerde ecologische zeeweringconstructie volgens conclu- sie 1, met het kenmerk, dat de afstand tussen de twee aangrenzende oesterriffen van legeringskooien in de lengterichting niet groter is dan de helft van de lengte van een enkel oesterrif van een le- geringskooi.A combined ecological seawall structure according to claim 1, characterized in that the distance between the two adjacent oyster reefs of alloy cages in the longitudinal direction is not greater than half the length of a single oyster reef of an alloy cage. 4. Gecombineerde ecologische zeeweringstructuur volgens conclusie 1, waarbij het oesterrif van een legeringskooi een legeringskooiThe combined ecological seawall structure of claim 1, wherein the oyster reef of an alloy cage is an alloy cage (2) omvat, waarbij de bovenste laag in de legeringskooi (2) is ge- vuld met oesterschelpen (3) en de onderste laag is gevuld met na- tuurlijke blokstenen (4).(2) in which the top layer in the alloy cage (2) is filled with oyster shells (3) and the bottom layer is filled with natural boulders (4). 5. Gecombineerde ecologische zeeweringconstructie volgens conclu- sie 1, waarbij lokale mangrove- of kwelderplanten worden geselec- teerd voor de kustwetlandplanten (5) in overeenstemming met lokale omstandigheden, en de zaailingen grote zaailingen zijn.The combined ecological seawall construction according to claim 1, wherein local mangrove or salt marsh plants are selected for the coastal wetland plants (5) according to local conditions, and the seedlings are large seedlings. 6. Gecombineerde ecologische zeeweringconstructie volgens conclu- sie 1, waarbij de verhouding van de hoogte van het oesterrif van de legeringskooi tot de waterdiepte groter is dan 0,1.The combined ecological seawall construction of claim 1, wherein the ratio of the height of the oyster reef from the alloy cage to the water depth is greater than 0.1. 7. Werkwijze voor het vervaardigen van de nieuwe gecombineerde ecologische zeeweringconstructie, omvattende de volgende stappen: 501, het verkrijgen van gegevens van invallende golflengte L, golfhoogte H en periode T van golf en waterdiepte h in het beoogde zeegebied; S502, het bepalen van de grootte en het aantal van het oesterrif van een legeringskooi op basis van hydrologische gegevens verkre- gen in S01, waarbij de lengte en het aantal van de oesterriffen van de legeringskooien worden bepaald in overeenstemming met de lengte van de doelkust, waarbij de afstand tussen twee aangrenzen- de oesterriffen van legeringskooien in de dwarsrichting gelijk is aan de breedte van enkel oesterrif van een legeringskooi, en waar- bij de som van de twee positieve gehele veelvouden van de helft van de golflengte van de invallende golf is, de onderlinge afstand tussen de twee aangrenzende oesterriffen van legeringskooien in de lengterichting niet groter is dan de helft van de lengte van het een enkel oesterrif van een legeringskooi, en de verhouding tussen de hoogte van het oesterrif van de legeringskooi D en de water- diepte h groter is dan 0,1; 503, het vullen van natuurlijke blokstenen (4) in de onderste laag van de legeringskooi (2), en het vullen van oesterschelpen (3) in de bovenste laag om het oesterrif van de legeringskooi te vervaar- digen; 504, het periodiek plaatsen van de oesterriffen van legeringskooi-A method of manufacturing the new combined ecological seawall structure, comprising the steps of: 501, obtaining data of incident wavelength L, wave height H and period T of wave and water depth h in the target sea area; S502, determining the size and number of the oyster reef of an alloy cage based on hydrological data obtained in S01, determining the length and number of the oyster reefs of the alloy cages in accordance with the length of the target coast, where the distance between two adjacent alloy cage oyster reefs in the lateral direction is equal to the width of a single alloy cage oyster reef, and where the sum of the two positive integer multiples of half the wavelength of the incident wave is, the distance between the two adjacent oyster reefs of alloy cages in the longitudinal direction does not exceed half the length of a single oyster reef of an alloy cage, and the ratio between the height of the oyster reef of the alloy cage D and the water depth h is greater than 0.1; 503, filling natural boulders (4) into the bottom layer of the alloy cage (2), and filling oyster shells (3) into the top layer to make the oyster reef of the alloy cage; 504, the periodic placement of alloy cage oyster reefs en vervaardigd in stap S03 in het beoogde zeegebied, in de trans- versale richting, waarbij de uitstrekkingsrichting van de oester- riffen van de legeringskooiì die periodiek zijn gerangschikt con- sistent is met de richting van de invallende golf, en de oester- riffen van de legeringskooi op onderbroken wijze loodrecht op een kustlijn zijn gerangschikt; waarbij in de lengterichting de uit- strekkingsrichting van de periodiek aangebrachte oesterriffen van de legeringskooi loodrecht staat op de richting van de invallende golf, en de oesterriffen van de legeringskooi discontinu zijn ge- rangschikt langs de kustlijn; S05, het verplanten van zaailingen van kustwetlandplanten (5) in de intergetijdenzone direct achter het oesterrif op een op basis van Bragg reflectie werkende ondergedompelde golfbreker construc- tie (1) geplaatst in S04.and manufactured in step S03 in the target sea area, in the transverse direction, where the extension direction of the oyster reefs of the alloy cage that are periodically arranged is consistent with the direction of the incident wave, and the oyster reefs of the alloy cage are arranged perpendicular to a coastline in a discontinuous manner; wherein in the longitudinal direction the direction of extension of the periodically arranged oyster reefs of the alloy cage is perpendicular to the direction of the incident wave, and the oyster reefs of the alloy cage are discontinuously arranged along the shoreline; S05, the transplantation of coastal wetland plant seedlings (5) in the intertidal zone immediately behind the oyster reef on a Bragg reflection submerged breakwater structure (1) placed in S04.
NL2030409A 2022-01-03 2022-01-03 Novel combined ecological seawall structure and manufacturing method thereof NL2030409B1 (en)

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