多年来 ,密西西比河沿岸的土地拥有者一直靠建造大型土堤来阻挡洪水。但是堤下的渗漏是一个严重的问题。通常的解决办法是在堤的基础处建造土戗道 ,但这需要大量的填土。美国陆军工程兵团已发现了一种保护堤防的较好方法 ,这种方法不需要大量的土料。于是 ,工程兵团开始沿路易 Over the years, landowners along the Mississippi River have been stopping floods by building large earth embankments. However, leakage under the embankment is a serious problem. The usual solution is to build earthworks at the foundation of the dike, but this requires a lot of filling. The United States Army Corps of Engineers has found a better way to protect the dike, which does not require large amounts of soil. So, Corps began along Louis