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Reports: 16. Geology and Ground-Water Resources of the Coastal Area in Mississippi, Bulletin 60. (1944). Mississippi State Geological Survey. University, Mississippi: Morse, William Clifford. This is a county by county description of the geology, sediment deposition patterns, and groundwater resources in Mississippi. It gives very site-specific data, as opposed to generalizations about the region. It gives, for example, tables of water analysis of individual wells in Pearl River County. There are many gaps in data collection. The report details other rivers, such as the Pearl and Pascagoula that have similar changing delta patterns as the Mississippi river, except on a much smaller scale. It mentions a proposed subdelta, the Metairie-Gentilly, exposed along the southeast shores of Lake Ponchartrain. Sediment cross-sections of off-shore islands show delta/river deposition origins. The maps included are important because they are drawn before the Old River complex was put in and the levee system was reinforced and more uniformly constructed. 17. US Army Corps of Engineers. (1944). West Atchfalaya Floodway. Washington DC: US Government Printing Office. There is a map here of the four major flood control works in the lower basin: the West Atchafalaya floodway, Morganza floodway, Bonnet Carre spillway, and Wax lake outlet. The West Atchafalaya floodway is bounded by levees on each side. It is used to divert some of the Mississippi, Atchafalaya, or Red river only during times of big floods. The channel later merges with the Atchafalaya to be carried out to the Gulf. As part of this project, the Corps built more and strengthened existing levees along with the western bank of the Atchafalaya. The new levees they constructed included ring levees to protect property that was in the way of the floodway area. To allow passage, control gates were installed, along with drainage channels, pits and streams to allow for uninterrupted drainage despite the presence of the levee. An allowance was made for one highway and railroad across the floodway. This control plan was designed to prevent another flood like the one of 1927 from happening again. The levee plans of the Corps are also included. |