Hydraulic Laboratory Results and their Verification in Nature

Data contained in this paper were assembled in 1933, added to in January, 1934, and again augmented in the summer of the latter year. Nevertheless, it is quite certain that the intervening months have produced many new facts corroborating the information set forth herein, and while it was not originally intended to present anything like a complete inventory of cases, still it would appear desirable to bring out all new facts in the order of their determination. From this standpoint it would seem that the proper purpose of the paper is to discuss in general the principles of verification of hydraulic model results, to present a number of concrete examples, and to open the way for subsequent discussions. Since the subject can never become closed, it would be presumptious to claim more than a “scratching of the surface” in the present instance. In spite of this, the hope is held that the following pages will serve to assure the profession that efforts are being made to verify the reliability of results obtained by hydraulic model experimentation.