Effect Analysis of Plant Ecological Technology on Bank Protection -A Case Study in the Lower Reach of Zhang River
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Abstract:
In this paper, the bank protection mechanism and effects of plant technology were introduced. A mathematical model was developed to analyze the soil reinforcement by the plant root system and the reductions of flow drag force and scouring around spur dike by the above-ground parts of plant based on a flood control construction (spur dike) located in the downstream reach of Zhang River at Chengcun. The results showed that although the effective flow drag force near the soil of spur dike increases with the increasing of flow rate after the planting, the increment decreases, which indicated that the reduction function of the plants increases with the increasing of flow rate. Moreover, the study concluded that the scour depth of the flood control construction (spur dike) reduced by 40 to 126 cm in the range of studied flow rates.
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