SOME FLORIDA LAKES AND LAKE BASINS. I5I 



The flow in cubic feet per second into the well will be 



d- sjTi 



Q= 0.0055 rf^V=__L_ „,,Hy 



In this formula Q represents the flow in cubic feet per second ; 

 d is the inside diameter of the pipe in inches, and h the height in 

 inches to which the water rises in the long arm above the surface 

 of the lake. V is the velocity of flow. 



A notably successful instance of drainage by wells where the 

 interests of a municipality were involved occurred at Orlando, 

 Florida, and was given in Bulletin No. i, as follows: 



"A very considerable land area south and east of Orlando, em- 

 bracing possibly fourteen square miles, lies in an irregualr basin 

 with many lakes, marshes, and ponds. The overflow from this 

 area originally drained to and disappeared through a natural sink 

 about one mile east of the city. This sink became clogged in April, 

 1904. Unsuccessful efforts were made to re-open this sink, first 

 by removing hyacinths accumulated around the opening, and later 

 b)' the use of dynamite. In the meantime, heavy and continued 

 rains formed a lake around the sink, overflowing the surrounding 

 lands. In August, 1904, efforts were made to dispose of the water 

 through drainage wells. The first well put down was a two-inch 

 test well. The well reached a porous stratum and was thought to 

 justify the expense of a larger and deeper well. Difficulty and de- 

 lay were experienced in the drilling, but by August, 1905, two wells, 

 one eight-inch and one twelve-inch, put down at the side and near 

 the original sink, had been completed. Two other wells were 

 started and abandoned owing to the difficulties in drilling. The 

 two successful wells were running at full capacity. It was thought 

 probable that the two wells already put down would prove suffi- 

 cient. Heavy rains followed, and by January, 1906, a considerable 

 area, including some cultivated ground, was flooded, practically 

 all county roads leading into Orlando from the east were partly un- 

 der water and impassible. The colored settlement known as Jones- 

 town in the suburb of Orlando was partly under water and unin- 

 habitable; the water was approaching the city of Orlando itself and 

 the situation was becoming alarming. Levels taken by the county 

 authorities indicated that drainage through surface canals was im- 

 possible or impracticable. Two additional twelve-inch wells were 

 bored in November and December of 1906. The effect of these 

 was evident at once, the lake beginning to fall. By February a 

 third twelve-inch well had been completed making in all one eight- 



