Soil Characterization and Alternate Shoreline Erosion Control Measures for Constructed Lakes in Iowa

摘要

Field observations of eroded lake shoreline profiles and field and laboratory measurements of geotechnical properties of shoreline soils led to development of a shoreline erosion model. The model includes equations which can be used to estimate the potential maximum height of wave-cut cliff. Predictions obtained from the model were compared with measured values in the field, and were found to show reasonable agreement. This model may be the first stop for developing a design method whereby shorelines of artificial lakes can be graded to an equilibrium configuration, thereby eliminating/minimizing erosion by wave action. Soil characterizations included soil composition analysis (e.g., sand, clay, gravel, silt), dry weight, moisture, and shear strengths. Samples were taken from shorelines of two man-made lakes to compare/contrast shoreline erosion. The lakes examined were Big Creek Lake in Polk County and Prarie Rose Lake in Shelby County.