Vegetated Geogrids

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AdvantagesJack fields have many advantages overother engineered shore protectionapproaches, among them are:• They have the capacity to trapsediment along the shore.• They can be used in conjunction withnatural vegetation.• Jacks can eventually becomeembedded into the stream bank.DisadvantagesJack fields have many disadvantagescompared to other engineered shoreprotection approaches, among them are:• Construction and installation iscomplex and the system needs to beproperly designed to be effective.• Jack fields can not be used on highvelocity streams.Similar TechniquesAlternatives include: rip-rap, revetments,coconut fiber rolls.DRAFT
Green (Bio) WallsApproachConstruction CostSoft Hard Low HighMaintenance CostAdaptabilityLow High Low HighDescriptionA green or bio wall is a somewhatgeneric term used to describe hard sheerstructures which are softened using avariety of techniques. Bulkheads,gabions, or keystone walls frequentlyserve as the base for a green wall. Themethods used to soften these hardstructures range from the incorporationof minimalistic vegetation, to variationsin the form of the structure itself.Examples include incorporating terracedor rough edges, using alternate materials,or introducing undulations along thelength of a structure. The purpose ofthese modifications is to improve boththe aesthetic and ecological value of thestructure, while providing the same highlevelof protection afforded by the basestructure. Green walls have been usedincreasingly in urban settings where ahigh level of protection is required andwhere space is limited.however due to the many uncertaintiesinvolved, scale physical models arefrequently more appropriate.Figure 18: Laboratory study of wave run-upalong a green wall.DRAFTDesign and ConstructionThe design of green walls is extremelysite specific. The base structure isdesigned using the methods applicable tothat structure. The impact of introducingundulations, terraces, rough surfaces,and even vegetation frequently must bemodeled due to the unique and oftennon-linear aspects of the structures. Thismodeling can be computational,Figure 19: Laboratory study of circulationadjacent to a green wall.AdaptabilityGreen walls have a very limited capacityto adapt to changing conditions,although they are typically designed tohandle a wide range of conditions. If thebase of the green wall is something likea gabion or keystone structure, adding
Page 1 and 2: Engineered Approaches for LimitingE
Page 3 and 4: MethodologyA systematic approach wa
Page 5 and 6: excellent strength characteristics
Page 7 and 8: • Bulkheads are very effective ag
Page 9 and 10: advantage makes gabions useful when
Page 11 and 12: • Ice and other debris can damage
Page 13 and 14: The filter layer is what supports t
Page 15 and 16: Rootwad RevetmentsApproachConstruct
Page 17 and 18: Tree RevetmentsApproachConstruction
Page 19 and 20: Rip-rapApproachConstruction CostSof
Page 21: Jack FieldsApproachConstruction Cos
Page 25 and 26: Live Crib WallApproachConstruction
Page 27 and 28: Similar TechniquesAlternatives incl
Page 29 and 30: AdaptabilityDue to their size and c
Page 31 and 32: It is possible to stack several tub
Page 33 and 34: to the one beneath it. The geogridv
Page 35 and 36: AdaptabilityJoint plantings can be
Page 37 and 38: protection of the toe and flanks, p
Page 39 and 40: Branch PackingApproachConstruction
Page 41 and 42: Live FascinesApproachConstruction C
Page 43 and 44: Similar TechniquesAlternatives incl
Page 45 and 46: AdvantagesCoconut fiber rolls have
Page 47 and 48: approach makes replacing entire sec
Page 49 and 50: above the normal waterline, with ha
Page 51 and 52: • Soil bioengineering projects ar
Page 53 and 54: (vegetation, oyster reefs, etc). Ho
Page 55 and 56: order of 1 - 2.5 times the length o
Page 57 and 58: with relative ease. In additionrein
Page 59 and 60: timber is most common. Construction
Page 61 and 62: AdaptabilityBreakwaters are typical
Page 63 and 64: AdaptabilityAs a floating structure
Page 65 and 66: AdaptabilityLiving breakwaters have
Page 67 and 68: AdvantagesSills have many advantage
Page 69 and 70: in trapping sediments, and may need
Page 71 and 72: Living ShorelinesGroinsStream Barbs
Page 73 and 74:
Gabions - Gabions are wire mesh con
Page 75 and 76:
ReferencesAllen, G., T. Cook, E. Ta
Page 77 and 78:
Goard, D., 2006. Riparian Forest Be
Page 79:
Stormwater Management Resource Cent
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