Seepage Characteristics of Agricultural Reservoir Embankment Based on Installation of Overtopping Prevention Structures

In this study, a structure that can effectively prevent overtopping caused by abnormal rainfall was installed in deteriorative agricultural reservoir, and seepage characteristics were compared analyzed through model experiments numerical analysis. The experimental conditions observed installing stepped gabion, vertical parapet combination with gabion retaining wall, geomembrane, core on the dam crest. Small horizontal displacements without defects found, such as overturning failure, to overtopping. A comparison of line pore water pressure results indicates drained smoothly toe drain filter from upstream slope. It perceived concentration upper part crest might cause leakage downstream slope affect stability prevention structures. distribution hydraulic gradient found be stable all cases could vulnerable leakage, so careful management is required when constructing geomembrane. Overall, among three structures applied, wall did not problems leakage. Therefore, it considered better than other types structure.