Jun 6, 2012

Hydrologic grapevine

Here's a weekly hydrologic update for Big Cypress Nat'l Preserve.

Area of lingering drought in the northwest part of the swamp,
i.e. even the pond apple are still dry.

INTERACTIVE HYDROLOGIC OVERVIEW MAP: Most of our BCA hydrostations are showing that surface water has returned. The east side of the preserve is wettest, showing water levels in many areas (including Raccoon Point) to have risen into the marl prairies. Thus, if you were standing in a nearby pond apple forest, water would been shin deep, or about 1 foot deep as measured from the pond apple forest floor. The northeast corner of the preserve is much drier in comparison. Our stations show water levels in that area to still be below ground surface. This disparity in wetting can be seen in this interactive hydrologic map of the preserve. Explanation of map: Cypress tree icons (and respective color coding) shows presence and height of surface water flooding. Flame icons indicate presence and severity of drought.

Simply "click on the icons" to view statistical and historical charts for every station.

RAINFALL TRENDS: Oasis leads all station with 13 inches of rain over the past 30 days. (Oasis recorded 8 inches of rain in May and over 5 inches through the first 4 days of June.) Here's rain chart for Oasis.  Compare that to Bear Island in the preserve's northwest corner where only 5 inches of rain has been recorded over the past 30 days.  Click here to view a preserve-wide rain chart plotted at weekly, monthly, and yearly/seasonal intervals

PRESERVE WIDE HYDROGRAPH: As shown on this hydrograph, preserve wide stage has rebounded 1.25 ft from where it bottomed out in mid April. Unlike last spring, this spring's drydown was was not as severe, or as long. For example, early June of last year, the swamp was still in severe drought, with water levels a full 2 feet below the bottom of the pond apple forest floor. In comparison, this year's drydown bottomed out only 1 ft below the pond apple forest floor ... and as of early June (i.e. where we are now), the pond apple forests are already (on average) flooded with 1 foot of water. As shown in the preserve-wide hydrograph (see link above), a similar flooding level was not achieved last year until mid July.

Can you see the cypress from the pines?
It's toughest to do when everything is green.
As seen May 24th, 2012

And that's the way it was (in the swamp), Wednesday June 6th, 2012.

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