effect on hydrographic phenomena such as salinity and water currents. Phos- 

 phorus and nitrogen did not seem to be affected. Silicate and chlorophyll 

 a were affected the most by dredging. Silicate was higher than the previous 

 year in the bay. Chlorophyll a concentrations were high during the summer 

 in the bay and channel. In the bay, these high concentrations seemed to be 

 due to benthic rather than plankton algae. 



46. FESTA, J.F., and HANSEN, D.V., "A Two-Dimensional Numerical Model of 

 Estuarine Circulation: The Effects of Altering Depth and River Discharge," 

 Estuarine and Coastal Marine Saienoe, Vol. 4, No. 3, May 1976, pp. 309-323. 



Steady-state numerical solutions are obtained for a two-dimensional, 

 vertically stratified model of a partially mixed estuary. A number of cases 

 are run for various estuarine parameters; the river transport and Rayleigh 

 number being the two parameters that have the most pronounced effect. The 

 river transport is varied by adjusting the mean freshwater velocity. Decreas- 

 ing it allows salt and stagnant water to penetrate upstream. The estuarine 

 circulation weakens, but expands over a larger part of the estuary. The 

 position of the stagnation point with respect to the seaward boundary varies. 

 Increasing the Rayleigh number by deepening the estuarine channel results in 

 an increased circulation as well as strong intrusion of salinity and inward 

 migration of the stagnation point. The horizontal location of the stagnation 

 point is found to be proportional to the Rayleigh number and, therefore, 

 varies with the channel depth. 



47. FRENCH, R.R., and BAKKALA, R.G., "A New Model of Ocean Migration of 

 Bristol Bay Sockeye Salmon," Fishery Bulletin, Vol. 72, No. 2, Apr. 1974, 

 pp. 589-614. 



A model is presented that describes the ocean migration of Bristol Bay 

 sockeye salmon from the time the fish leave the estuary until they return as 

 adults. Bristol Bay sockeye salmon inhabit extensive areas of the ocean 

 during various stages of their life, ranging across most of the North Pacific 

 Ocean from about longitude 140° W. to near longitude 167° E. and from near 

 latitude 46° N. to latitude to 58° N. in the central Bering Sea. A direct 

 relationship was not found between the distribution and migration of the 

 sockeye salmon and the defined oceanographic features of the subarctic region 

 of the north Pacific Ocean. 



48. FUNK, J.L., and ROBINSON, J.W., "Changes in the Channel of the Lower 

 Missouri River and Effects on Fish and Wildlife," Report No. Aquatic 

 Ser-11, Missouri Department of Conservation, Jefferson City, Mo., 

 Nov. 1974. 



This report documents changes made in the channel of the Missouri River- 

 over the past 90 years and the loss of fish and wildlife habitat associated 

 with these changes. The water surface area of the river between Rulo, Nebraska, 

 and its mouth has been reduced by 50 percent. Islands have been virtually 

 eliminated. The full volume of the river's flow is confined within a 

 relatively narrow channel of rather uniform width. Both the fish of the 

 river and the wildlife have been taken for granted and overexploited. 



49. CAYMAN, W. , "Offshore Dredging Study: Environmental Ecological Report," 

 Ooean Management, Vol. 4, No. 1, Sept. 1978. 



Report discusses Israel's plan to dredge 14 million cubic meters of 

 kurkar, a soft calcareous sandstone, each year from the shallow sea floor 



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