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| Author | : United States. Army. Corps of Engineers |
| Publisher | : |
| Total Pages | : 222 |
| Release | : 1966 |
| Genre | : Charleston Harbor (S.C.) |
| ISBN | : |
| Author | : CORPS OF ENGINEERS CHARLESTON SC CHARLESTON DISTRICT. |
| Publisher | : |
| Total Pages | : 135 |
| Release | : 1966 |
| Genre | : |
| ISBN | : |
The purpose of this study was to delineate the sources of the material responsible for the large increase in shoaling in Charleston Harbor following the admission of Santee River waters in 1942. In a real sense, there are both sources and causes, and the causes seem to be more significant than the sources. For example, a certain volume of sediment was available for shoaling prior to 1942, but the same original volume of sediment was, according to hydraulic model studies, responsible for about 80 percent more shoaling after 1942 than it caused before then. The cause: increased fresh water inflow alone. Again, a large fraction of the total dredging consists of material that has to be rehandles; that is, runback from previous dredging. The causes: a change in the character of the material requiring removal from sand to fluid mud; the time lag required to ascertain the ineffectiveness of spoiling methods, and to institute changes; but the relevant cause was the occurrence of this fluid mud which could be handled only with this degree of effectiveness. And the more remote cause was a change in the salinity regime of the harbor induced, again, by large fresh water inflows.
| Author | : CORPS OF ENGINEERS CHARLESTON SC CHARLESTON DISTRICT. |
| Publisher | : |
| Total Pages | : 122 |
| Release | : 1966 |
| Genre | : |
| ISBN | : |
The purpose of the study was to investigate the effects of the proposed Cooper River rediversion on the water quality in Charleston Harbor. The scope of the study was to determine the existing water quality as measured by various bacteriological, biological, chemical and physical parameters; an investigation of the effects of interactions of these parameters on environmental changes; and a prediction of the response of the water quality tothe proposed reduction of fresh water inflow. The area of study included the lower reaches of the Ashley, Cooper, and Wando Rivers, the harbor area between these tributaries, and the harbor entrance.
| Author | : CORPS OF ENGINEERS CHARLESTON SC CHARLESTON DISTRICT. |
| Publisher | : |
| Total Pages | : 139 |
| Release | : 1966 |
| Genre | : |
| ISBN | : |
Given are the views of affected state and Federal agencies to the two plans for rediverting part of the Cooper River outflow from Lake Moultrie. Rediversion is necessary to reduce the maintenance dredging load in Charleston harbor caused by the increased sedimentation from diverted Santee River water.
| Author | : CORPS OF ENGINEERS CHARLESTON SC CHARLESTON DISTRICT. |
| Publisher | : |
| Total Pages | : 111 |
| Release | : 1966 |
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Primary emphasis is upon determination of the most practicable solution to the current dredge spoil disposal problem, and that which would exist both with and without the construction of corrective works for the alleviation of shoaling. The period 1965-2024 is chosen pursuant to above-stated authority and includes a 50-year period beyond the estimated completion date of proposed corrective works. Discussions are included on the following matters: (1) Location of shoals and estimated annual quantities by shoal reaches. (2) Attitude of Navy and shipping interests towards conditions of channels. (3) Present and potential disposal areas. (4) year-by-year plan for dredging and disposal of spoil materials for the next 60 years, including estimated costs. (5) Types of maintenance operations considered with estimated costs and reasons for selecting recommended types. (6) Arrangements made with local sponsors to furnish disposal areas needed and prospects that the areas will be furnished when needed, including adequacy of arrangements in view of National Defense uses of the harbor.
| Author | : CORPS OF ENGINEERS CHARLESTON SC CHARLESTON DISTRICT. |
| Publisher | : |
| Total Pages | : 166 |
| Release | : 1966 |
| Genre | : |
| ISBN | : |
The existing comprehensive fixed-bed model of the Charleston Harbor system was used to conduct several special-purpose studies. These studies involved a proposed silt trap in Wando River, salinity investigations, a proposed spoil area dike, a scheme to redivert powerhouse discharge from Cooper River into Wando River, intermittent powerhouse operation to meet peak demands, and a proposed extension of the existing navigation channel in Cooper River. In general, model tests were conducted to determine the effects of the several proposals on tides, currents, and salinities throughout the estuary, and test results consist primarily of measurements of tide heights, current velocities, salinities, time-exposure photographs of surface current patterns, graphic illustrations of dye dispersion, and analyses to determine flow predominance.
| Author | : CORPS OF ENGINEERS CHARLESTON SC CHARLESTON DISTRICT. |
| Publisher | : |
| Total Pages | : 73 |
| Release | : 1966 |
| Genre | : |
| ISBN | : |
Field and Laboratory Operations; Shoal Sampling; River Bed and Bank Sampling; Erosion Studies; Shoal Studies; Shoal Surveys; Daily Tailrace Canal Sampling; Suspended Sediment and Salinity Sampling; Gaging Program; Observation of Dredging Methods; Salinity Test; Total Sediment Test; Removal of Dissolved Salts; Density (Unit Weight); Mechanical Analysis; Atterberg Limits; Specific Gravity; Flocculation Studies; Chemical Tests.
| Author | : CORPS OF ENGINEERS CHARLESTON SC CHARLESTON DISTRICT. |
| Publisher | : |
| Total Pages | : 102 |
| Release | : 1966 |
| Genre | : |
| ISBN | : |
The ten plans of improvement considered all seek to reduce the cost of maintaining authoritzed depths in the navigable channels. of Charleston Harbor. The various plans take two basic approaches: (1) they eliminate or restrict release of water at Pinopolis or, (2) they permit unrestricted release of water at Pinopolis. Those plans falling into the first category include the provision of steam generation capacity to replace the present hydro power capacity (with the surplus water to be spilled into the Santee River), or the provision of an alternate hydro power installation inthe vicinity of St. Stephen, S.C., which would dispose of these waters by discharge in to the Santee River. Three separate plans were studied in which alternate hydroelectric plants were considered. Plans falling under the second category (above) include three simple rediversion canal routes that divert Pinopolis releases from the harbor, and two rediversion plans that divert the waters of the upper Cooper and later readmit it into the lower harbor; and one plan, a general channel rectification plan, which would deepen, widen, and straighten the upper Cooper River with an eye toward reducing velocities, thus preventing erosion of the channel. All of these plans are discussed in detail.
| Author | : CORPS OF ENGINEERS CHARLESTON SC CHARLESTON DISTRICT. |
| Publisher | : |
| Total Pages | : 119 |
| Release | : 1966 |
| Genre | : |
| ISBN | : |
X-ray diffraction and petrographic analysis of several hundred sediment samples from rivers, estuary, and tidal delta areas of the physiographic unit comprising Charleston Harbor has established mineral ratios and diagnostic minerals which may be used as natural tracers to delineate source areas. The minerals and their relations to source areas enable a process-response model capable of explaining the transport and deposition in shoal areas of Charleston Harbor. Suspeneded samples taken at regular intervals simultaneously at several stations in Charleston Harbor and approaches during a tidal cycle were analyzed for composition, salinity, and velocity parameters which confirm source areas delineated in bottom seidment as well as establishing tidal flow characteristics. The use of hornblende as a natural tracer in sand size sediment, as well as sedimentary parameter values, reveals that only fines are being contributed from the Piedomont-source santee watershed div erted to thge Cooper River, while kaolinite in t he clay-mineral suite from that source is abundant and in high proportions (70-80%) as contrasted to residual Coastal Plain clays (20-30%). Since montmorillonite is the most abundant Lower Coastal Plain clay mineral, the values of kaolinit e/mont morillonite enable an approximate statistical model which may be used as an index to source.
| Author | : William H. Bobb |
| Publisher | : |
| Total Pages | : 186 |
| Release | : 1966 |
| Genre | : Charleston (S.C.) |
| ISBN | : |
The existing comprehensive fixed-bed model of the Charleston Harbor system was used to conduct several special-purpose studies. These studies involved a proposed silt trap in Wando River, salinity investigations, a proposed spoil area dike, a scheme to redivert powerhouse discharge from Cooper River into Wando River, intermittent powerhouse operation to meet peak demands, and a proposed extension of the existing navigation channel in Cooper River. In general, model tests were conducted to determine the effects of the several proposals on tides, currents, and salinities throughout the estuary, and test results consist primarily of measurements of tide heights, current velocities, salinities, time exposure photographs of surface current patterns, graphic illustrations of dye dispersion, and analyses to determine flow predominance.
