One Everglades but many hydrographs

Hydrographs can be hard to read.

That’s where adding photos to the background can better help paint the hydrologic scene.

A background photo sometimes makes hydrographs easier to read

This particular hydrograph shows water depth in the Everglades for Water Conservation Area 3A. The hydrograph shows that the “tree island” high ground has been completely dry since November whereas the deep-water “sloughs” are still holding water about a foot deep.

The “ridges” are still flooded with water, but at only a few inches deep.

Look for them to go dry by the start of spring.

How far will water levels drop?

To answer that it’s probably more instructive to look at a more statistically-robust hydrograph (click here to see) instead, and probably study up on the entire hydrologic period of record as well (shown below).

Habitat-coded graphical display of WCA3A water stage through the decades

Importantly, the hydrographs above are actually an aggregate of three different stations – Site 63, Site 64, and Site 65 – which in local circles is better known as “regulatory stage for WCA3A.” Thus, in order to be precisely accurate it would be necessary to look at each individual stations to determine when, if, and how long each one gets wet and goes dry.

Currently, sloughs are flooded with 1.75 feet deep of water to the south in Site 65 but only around 0.33 feet deep to the north at Site 65.

In a nutshell …

There’s probably no one single hydrograph that says it all …

Although wouldn’t life be easier if there was?

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