Here is a list of useful resources/e-books/links:
E-Books
- Concise Hydraulics
http://bookboon.com/en/conceise-hydroulics-ebook#download
- Essential Engineering Mathematics
http://bookboon.com/en/essential-engineering-mathematics-ebook
- The Fluvial Design Guide (mainly for UK rivers, but still has useful stuff on floods and hydraulics)
- Tides, surges and mean sea level – David T Pugh
http://eprints.soton.ac.uk/19157/1/sea-level.pdf
Online Textbooks for Free
http://bookboon.com/en/textbooks-ebooks
Web-Sites:
- British Oceanographic Data Centre (BODC)
- Permanent Service for Mean Sea Level (PSMSL)