Text this: Effect of fluctuation of water level on stability of dike

 __   _     ______    _____     ______    _____   
| || | ||  /_   _//  / ____||  /_   _//  /  ___|| 
| '--' ||   -| ||-  / //---`'   -| ||-  | // __   
| .--. ||   _| ||_  \ \\___     _| ||_  | \\_\ || 
|_|| |_||  /_____//  \_____||  /_____//  \____//  
`-`  `-`   `-----`    `----`   `-----`    `---`