Investigation Of Underseepage And Its Control Lower Mississippi River Levees Appendix E Analysis Of 1961 Piezometric Data PDF Download

The studies and data presented in this report are the result of the combined efforts of the Memphis, Vicksburg, and New Orleans Districts and the Waterways Experiment Station, under the general direction of the Mississippi River Commission. These studies have included a review and compilation of all underseepage reports made during and since the 1937 high water; exploration and geological studies of numerous sites where underseepage was a serious problem in 1937; installation of piezometers at selected sites to measure substratum pressures beneath and landward of levees; field pumping tests to determine the permeability of the sand aquifer at certain sites; theoretical, electrical- analogy, sand model, and prototype studies of relief wells, partial cutoffs, and landside berms for the control of underseepage; and observation and measurement of natural seepage at certain locations during the 1950 high water.