▁has ▁o vers ight ▁responsibility ▁for ▁the ▁five ▁water ▁management ▁districts . ▁ ▁Function ▁SR W MD ’ s ▁hydro log ical ▁activities ▁include ▁reg ulating ▁the ▁consum pt ive ▁use ▁of ▁water , ▁reg ulating ▁the ▁construction ▁and ▁maintenance ▁of ▁storm water ▁management ▁systems ▁that ▁serve ▁developed ▁properties ▁in ▁order ▁to ▁protect ▁water ▁quality ▁and ▁prevent ▁flo oding , ▁reg ulating ▁the ▁construction ▁of ▁water ▁well s ▁and ▁the ▁lic ensure ▁of ▁water ▁well ▁contract ors , ▁conduct ing ▁water ▁supply ▁planning , ▁conduct ing ▁research ▁on ▁water ▁resource ▁issues , ▁bu ying ▁and ▁man aging ▁environment ally ▁sensitive ▁land , ▁and ▁the ▁operation ▁of ▁flo od ▁control ▁structures . ▁ ▁S cope ▁The ▁Florida ▁count ies ▁which ▁are ▁entirely ▁within ▁the ▁SR W MD ▁are : ▁Columbia , ▁D ix ie , ▁Gil ch rist , ▁Hamilton , ▁La f ay ette , ▁Mad ison , ▁Su w anne e , ▁Taylor , ▁and ▁Union . ▁Part ial ▁count ies ▁include : ▁A lach ua , ▁Baker , ▁Brad ford , ▁Jefferson , ▁Le vy ▁and ▁Put nam . ▁ ▁The ▁major ▁river ▁under ▁the ▁district ' s ▁control ▁is ▁the ▁Su w anne e . ▁The ▁major ▁trib ut aries ▁are ▁the : ▁Santa ▁Fe , ▁A lap aha ▁and ▁Ich et uck ne e . ▁Other ▁rivers ▁include ▁the ▁With la co o che e , ▁ ▁Fen h ollow ay , ▁A uc illa , ▁Stein h atch ee , ▁E conf ina , ▁W acc as assa