TOPIC: interest in tidal application

Hi everyone,

I was contacted a few days ago about creating an app to evaluate effects of tidal advection on SWMP parameters. The general idea is to create a tool to visualize dynamics of water quality or nutrient data for different tidal periods and cycles, with the objective of describing sink/source dynamics at different time scales. I have yet to conceptualize an approach but I thought it would be worthwhile to see if there was any interest.

Potential products could be an additional widget for our 'SWMP widgets' and/or additional functions to include in the SWMPr package. I'm very interested in suggestions, so please feel free to provide comments in this thread. In particular, what parameters are likely most affected by tidal advection? If so, what are relevant time scales? Would we expect differences between or within reserves? etc. I don't expect the application to be too complex, but rather it should provide a simple tool to conceptualize general patterns.

Please email Todd or myself if there are issues registering for the forum.

Thanks,

Marcus

YES! I think this we be pretty cool to do. So many interesting questions to explore. We have seen DO vary significantly with tides. It would be interesting to look more into it at our site how does DO change with in vs outgoing tides, slack vs moving tides. Would those be consistent at other reserves. Also with turbidity. We see correlation of turbidity with outgoing tides, is that the same at other reserves. How does that change for DO and Turbidity seasonally? Could be lots of cool stuff there.

We just published a paper in L&O; Methods looking at the effects of tidal advection on DO time series using four NERRS sites (Elkhorn Slough, Padilla Bay, Rookery Bay, and Sapelo Island). The paper is about using a statistical method to remove the advection signal from DO time series so that we can get better estimates of ecosystem metabolism. The image is a figure from the paper showing a DO time series before and after removing the tidal signal with our method (top) and the tidal height that looks an awful lot like the observed DO signal (bottom).



I guess I'd like to brainstorm about what an app might look like because there are certainly loads of ways we could examine the role of physical advection on SWMP data. Your post mentioned a few ideas but it would still be good to narrow it down as I don't want any product (app, swmpr functions, etc.) to be too ambitious. I'll have to think on it some more...

I'm interested in something but don't really know what to ask for. The one thing I can contribute to this discussion is that between-reserve comparisons could get really interesting; there are differences in the literature in how microtidal and macrotidal sites respond to nutrient loading (Monbet, Yves. 1992. Control of Phytoplankton Biomass in Estuaries: A Comparative Analysis of Microtidal and Macrotidal Estuaries. Estuaries 15: 563. doi:10.2307/1352398.).

That's all I've got though at this point.

Yea I need to revisit that Yves and Monbet paper, I remember there was lots of good info. It could be a useful starting point for where we might take an application.

Now I have a login that is recognizable. That looks like an interesting paper. Would love to read the full version. Running out now but wanted to say we should cogitate more on this I think the influence of the tides and timing of them as was indicated in your paper is key also. Interesting stuff