Seasonal High Water Table & Tidal Influences? 3

[Bill5000]

When determining the seasonal high water table for an oceanfront project does one need to adjust for the effects of daily high and low tides. It would seem that using redoxymorphic soil features would give one the elevation at high tide, but this elevation would drop as the tide went out.

Has anyone ever found references that speak to adjusting the elevation to adjust for tidal influences?

We are designing a beachfront structure and keeping the stormwater infiltration structure the required 2' above the seasonal high water table is a problem.

 

[RWF7437]

I have no idea what redoxymorphic soil features are but I'll go look it up.

Meanwhile, have you tried Googling Tidal Hydraulics, US Army Corps of Engineers ? or similar terms ? My recollection is that the Corps has done a lot of work in this area.

good luck

 

[RWF7437]

http://www.usace.army.mil/publications/eng-manuals/em1110-2-1607/toc.htm

 

[Bill5000]

RWF,

Thanks for the link!

 

[fattdad]

2 ft above the redox features would be my approach. Bearing in mind that they only develop if the high water table is maintained for a few weeks during the growing season, which may not be as bad as a blip in the water table owing to a high tide.

f-d

¡papá gordo ain’t no madre flaca!

 

[bmike]

Have a look at J.K. White and T.O.L. Roberts; The significance of groundwater tidal fluctuations; in Groundwater problems in urban areas, Proceedings of the International Conference organized by the Institution of Civil Engineers, London, 2-3 June 1993.

This may not provide the answers to your questions, but may provide a decent bibiography and some leads.