HYDROLOGICAL CHARACTERISTICS OF TAMPA BAY TRIBUTARIES 



167 



STATION 29 



100,000^ RIVER DISCHARG£ 

 80,000- 



^ 60,000 



tZ 40,000- 



"■ 20,000- 

 (?) 



0-' 



PRECIPITATION 



o 10.0- 



z 



o-J" 



300-1 WATER TEMPERATURE 



o . ' ^ ^= 



SALINITY 



I 10 00- = i i I 



INORGANIC PO4 P 



100 

 

 200 

 10.0- 



i 10.0- 



E li k E I 1 1 



TOTAL PO4 P 



NO3 NO2 N 



h K t  I 



STATION 30 



E m 



ri 1 



1 



L.-h. h 



0.I0-| COPPER = 



I I I I I i I I I I I I I I I 

 ONDJFMAMJJASOND 

 1958 1959 



 fe 



-= fe 



^ b ^ 



E E E L 



1 I I I I I I I I I I I I I I 

 ONDJFMAMJ JASOND 

 1958 1959 



SURFACE —  

 BOTTOM I 



Figure 3. — River discharge, precipitation, and hydrological properties of Hillsborough River. Florida, October 1958- 



December 1959. 



Eiver. In the Little Manatee River the maximum 

 discharges were from March through September. 

 Data for October, November, and December 1959 

 are available only for the Hillsborough Kiver. 

 The river discharges were considerably higher in 

 the Hillsborough and Alalia Rivers than in the 

 Little Manatee and Manatee Rivers (figs. 3, 4, 5, 

 and (>). The maximum discharge for the four 

 rivers for the water year, beginning October 1958 

 and ending September 1959, was okserved in the 

 Hillsborough Kiver (564,24-1 second- feet per day). 

 The minimum discharge was rei'orded in tlie 

 Manatee River (82,899 second-feet per day). 



624647 O — 62 2 



The concentrations of total phosphorus for all 

 rivers varied from 2.5 jxg.nt./l., observed at the 

 Hillsborough Kiver at station 30, to (iO.5 /ig.at./l. 

 recorded in the Alalia River at station 32. 



The concentrations of total phosphorus in the 

 Alalia River are extremely high in comparison to 

 those in the other three rivers. The average total 

 phosphorus value of 39.2 /ig.at./l. for the Alalia 

 River is 3.1 times that of the average value (12.6 

 ^g.at./l.) observed in the next liighest river, the 

 Little Manatee. The monthly variations in phos- 

 phorus were similar at stations 31 and 32 which 

 are 2.5 miles apart. 



