EXPERIMENTAL DETERMINATION OF MANNING’S ROUGHNESS COEFFICIENT FOR A CRUSHED-STONE-FILLED GEOMAT

N.V. KHANOV, A. BRAKENI, T.Y. ZHUKOVA

Abstract


Water erosion poses a serious threat to hydraulic structures, gradually destroying them. Therefore, the development and application of effective protective coatings for watercourses and bank slopes is particularly relevant today. The aim of this study is to determine the roughness coefficient of a protective coating for a watercourse and bank slope, consisting of geotextiles with crushed stone as a filler. This article examines the features of a model setup for determining the hydraulic characteristics of an anti-erosion coating and describes the methodology for their determination. The calculation formulas used to empirically obtain roughness coefficient values are analyzed. The results of experimental studies aimed at determining the roughness coefficient of a protective coating for various flow rates and channel bottom slopes are presented. The obtained results are analyzed, and the average roughness coefficient value is derived. Laboratory studies evaluating the roughness coefficient of an anti-erosion protective coating made from geotextiles with added crushed stone demonstrated the practical potential of this innovative fastening material. Recommendations for the use of this protective anti-erosion coating are provided.


Keywords


Erosion, Channel, Bank protection, Anti-erosion coating, Geomat, Crushed stone.

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References


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