Explore detailed measurements and analysis from early 20th-century field work assessing tidal behavior, river inflows, and the potential impact of a salt water barrier. This edition presents practical observations, methods, and interpretations behind the site evaluations and engineering considerations.

The material blends observed tides, velocity data, and river discharge figures with discussion of how seawater and freshwater mix might respond to barrier designs. It includes comparisons across sites, notes on data variability, and guidance on using sinusoidal approximations for tidal calculations.

Learn how tidal currents differ by depth and how surface versus bottom flow can shift during flood and ebb cycles
See how velocity measurements are taken and interpreted across vertical sections
Review river discharge estimates from multiple gauges and the implications for barrier planning
Understand the approach to modeling tidal waves and the caveats professionals consider in real-world projects

Ideal for readers of historical engineering reports, water resources studies, and site-specific field investigations, offering a window into early 20th-century methods and conclusions.

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