Ch. 17] REFERENCES 317 



lems of sedimentation in natural and artificial channels. The rapid 

 improvement of model techniques, together with the potentialities of 

 generalized laboratory experiments of a fundamental nature, should 

 correspondingly increase the scope of application. 



It is to be understood that the hydraulic model is not proposed as a 

 substitute for analytical design; nor can its use eliminate the need 

 for extensive field investigations. The three are mutually supporting. 

 The need for experimentation, however, is basically fostered by the 

 fact that present-day knowledge of sedimentation phenomena and river 

 hydraulics has not advanced to the point where such problems can be 

 resolved by theory alone. Until that point is reached, the hydraulic 

 model will continue to be a most useful expedient in providing infor- 

 mation not obtainable by other means. Thus, in its usefulness to the 

 engineer responsible for channel improvement, as in other problems of 

 hydraulic engineering, the small-scale model occupies a place of great 

 importance lying somewhere between the provinces of abstract theory 

 and rule-of-thumb field engineering. 



REFERENCES 



Central Waterways Irrigation and Navigation Research Station, Poona, India 

 (1940-41, 1941-42, 1942-43, 1944, 1945, 1946). Tidal model of the Hoogly 

 River: Annual Reports {Technical). 



Indian Waterways Experiment Station, Poona, India (1944). Deterioration of 

 deltaic rivers. Experiments with a model of the Nuna and Pothi rivers in the 

 Mahanadi Delta (Orissa) : Annual Report {Technical), Res. pub. 7. 



Levin, L. (1938). Small scale model study of the entrance of the Edward Her- 

 riot harbor, at Lyon, France : Translated by Z. Sonnier at U. S. Waterways Ex- 

 periment Station, Vicksburg, Miss., from Le genie civil, Oct. 1, 1938. 



Port Commissioners, Rangoon, Burma. Port of Rangoon, approach channels. 

 Experimental tidal model: Descriptive memorandum. 



U. S. Bonneville Hydraulic Laboratory, Bonneville, Ore. (1942). Model study of 

 the Bonneville navigation channel, Bonneville, Oregon: Rept. 2—1, Jan. 30, 

 1942. 



U. S. Waterways Experiment Station, Vicksburg, Miss. (1936a). Model study of 

 plans for the elimination of shoaling in the Delaware River entrance to the 

 Chesapeake and Delaware Canal: Tech. Memo. 93-1, June 1, 1936 (in two 

 parts) . 



U. S. Waterways Experiment Station, Vicksburg, Miss. (1936b). Model study of 

 maintenance works at Ballona Creek outlet, Venice, California: Tech. Memo. 

 100-1, Dec. 22, 1936. 



U. S. Waterways Experiment Station, Vicksburg, Miss. (1937a). Model study of 

 plans for the elimination of shoaling in Mare Island Strait, California: Tech. 

 Memo. 81-1, June 1, 1937. 



U. S. Waterways Experiment Station, Vicksburg, Miss. (1937b). Model study of 



