Historical and recent Historical and recent w ater level fluctuations in w ater level fluctuations in Lake Apopka Lake Apopka Lake Apopka Lake Apopka Rolland Fulton Rolland Fulton B rea B rea Bureau of Environmental Sciences Bureau of Environmental Sciences of En ironmental Sciences of En ironmental Sciences September 4, 2015 September 4, 2015
Early reports of Lake Apopka Early reports of Lake Apopka w ater levels w ater levels t t l l l l • At extremely high stages Lake Apopka At extremely high stages, Lake Apopka At extremely high stages Lake Apopka At extremely high stages, Lake Apopka overflowed northward through a swale overflowed northward through a swale connecting the lake with Lake Beauclair connecting the lake with Lake Beauclair connecting the lake with Lake Beauclair connecting the lake with Lake Beauclair (M.H. Connell & Assoc. 1954) (M.H. Connell & Assoc. 1954)
Atlas to accompany the official records of the Union and Confederate Armies. 1861 ‐ 1865
Early reports of Lake Apopka Early reports of Lake Apopka w ater levels w ater levels t t l l l l • 1893 1893 – – Canal dredged from Lake Apopka to Canal dredged from Lake Apopka to g g p p p p Lake Dora lowered lake level by 4 feet Lake Dora lowered lake level by 4 feet • By 1910 canal filled with vegetation and lake By 1910 canal filled with vegetation and lake • stage similar to original state stage similar to original state stage similar to original state stage similar to original state • USACE 1911 USACE 1911 – – water level range 69.1 to 70.2 ft water level range 69.1 to 70.2 ft (equ (equivalent to 66.7 (equivalent to 66.7 – (equ a e t to 66 a e t to 66 – 67.8 ft NAVD) 6 67.8 ft NAVD) 6 8 t 8 t ) ) • 1915 newspaper report 1915 newspaper report – – Zellwin Zellwin- -Florida Farms Florida Farms Company has learned that the low water mark Company has learned that the low water mark h h has been established at 62 ft (61.1 ft NAVD?) has been established at 62 ft (61.1 ft NAVD?) b b t bli h d t bli h d t 62 ft (61 1 ft NAVD?) t 62 ft (61 1 ft NAVD?) instead of 65.3 (64.4 ft NAVD?) as assumed at instead of 65.3 (64.4 ft NAVD?) as assumed at the the Tildenville Tildenville meeting meeting
2015 w ater levels and Doppler 2015 w ater levels and Doppler rainfall to lake w atersheds rainfall to lake w atersheds i f ll t l k i f ll t l k t t h d h d decreases decreases Lake Water level 2015 rainfall change through through Sep 2 Sep 2 (inches) p ( ) (inches) ( ) Apopka +3.24 34.1 Burrell +0.24 32.9 Griffin Griffin –2.04 2.04 34.8 34.8 +0.36 a Yale 34.4 a Lake Yale water level change through Aug 14
2015 w atershed and lake areas 2015 w atershed and lake areas Lake Watershed Lake Watershed area Area to lake (acres) (acres) area ratio Apopka p p 85,000 , 32,000 , 2.7 211,400 a Burrell basin lakes 33,000 6.4 281,800 b Griffin Griffin 281,800 13,800 13,800 20.4 20.4 Yale 11,400 3,900 2.9 a I a Includes Palatlakaha basin since there were discharges from l d P l tl k h b i i th di h f that basin in 2015 b Includes Burrell basin since there were discharges from that basin in 2015
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