Shoreline Plant Establishment and Use of a Wave-Stilling Device




Webb JW; Dodd JD

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The establishment and development of smooth cordgrass transplants on a 2-percent slope behind a wave-stilling device constructed of two tiers of tires strung on a cable were monitored along the north shore of East Bay in Texas. Two previous plantings on the sloped area, the first without wave protection and the second behind one tier of tires, were unsuccessful. After a second tier of tires was placed on top of the original tier, enough protection was provided from waves to allow successful planting. A 0.15-meter buildup of sediment occurred directly behind the barrier. Smooth cordgrass survival was approximately 50 percent and over 100 stems per meter squared were counted in some areas 1 year after planting. Density and height of smooth cordgrass increased with increasing hours of inudation. Rabbits apparently caused enough damage to plants outside a rabbit-proof fence that significant differences in density between fenced and unfenced areas occurred. With adequate wave protection, smooth cordgrass can be established below MHW in estuarine areas. Gulf cordgrass, marshhay cordgrass, and saltgrass can be used above MHW for shoreline protection




50B Civil Engineering: Civil Engineering;50D Civil Engineering: Soil & Rock Mechanics;Barriers;Bays;Beach erosion;Damage;Density;East Bay Texas;Estuaries;Galveston bay;Grasses;Ocean waves;Plant growth;Planting;Plants;Protection;Sea water;Sedimentation;Shore protection;Soil stabilization;Survival;Texas;Tires;United States;Vegetation;