General Index Map of Hydrologic Units in Florida
52
Region 03 South Atlantic-Gulf 54
39 Subregion Code and Name Basin Code and Name Subbasin Code and Name Map ID 40 33 0307 Altamaha-St. Marys Rivers 030702 St. Marys - Satilla Rivers 03070204 St. Marys River 1 55 47 03070205 Nassau River 2 ES CA M BIA 48 HO LM E S SA NTA ROS A 34 0308 St. Johns River 030801 St. Johns River 03080101 Upper St. Johns River 3 50 JACK SO N 03080102 Oklawaha River 4 OKA LOOS A 53 42 03080103 Lower St. Johns River 5 WAS HING TON 32 WALTO N NA SS AU 030802 East Florida Coastal 03080201 Daytona-St. Augustine 6 49 46 GADS DEN N O 31 02 51 38 S HA M ILTON 01 03080202 Cape Canaveral 7 CA LHOUN R BAY LE ON E MA DIS ON F
F A 03080203 Vero Beach 8 E I 41 37 J 45 B
M BA KE R DUVA L 0309 Southern Florida 030901 Kissimmee River 03090101 Kissimmee River 9 WAK ULLA U LIB ERTY SUWA NNE E L TAY LO R O 03090102 Northern Okeechobee Inflow 10 C D R 03090103 Western Okeechobee Inflow 11 FRANKLIN UNION O F ST JO HNS D CLAY 43 LA FAYE TTE A 030902 Southern Florida 03090201 Lake Okeechobee 12 30 R GULF B 03090202 The Everglades 13 35 36 05 03090203 Florida Bay-Florida Keys 14 44 GILCHRIST PUTNAM
03090204 Big Cypress Swamp 15 DIX IE ALACHUA 06 03090205 Caloosahatchee River 16 FLA GLER 03090206 Florida Southeast Coast 17 04 LE VY 0310 Peace River-Tampa Bay 031001 Peace River 03100101 Peace River 18 MA RIO N 29 03100102 Myakka River 19 03100103 Charlotte Harbor 20
031002 Tampa Bay 03100201 Sarasota Bay 21 LA KE VOLUSIA 03100202 Manatee River 22 CITRUS
03100203 Little Manatee River 23 SE MINOLE SUM TER 03100204 Alafia River 24 HE RNANDO 03 28 03100205 Hillsborough River 25 07 03100206 Tampa Bay 26 Legend 27 ORANGE 03100207 Crystal-Pithlachascotee 27 PAS CO OSCE OLA 03100208 Withlacoochee River 28 25 H P IL
Subregion Boundary I L 0311 Suwannee River 031101 Aucilla-Waccasassa Rivers 03110101 Waccasassa River 29 N S B E O L R BREVA RD 03110102 Ecofina - Steinhatchee River 30 L O POLK A U S G 09 03110103 Aucilla River 31 Basin Boundary 26 H 24 031102 Suwannee River 03110201 Upper Suwannee River 32 08 23 INDIA N RIV ER 03110202 Alapaha River 33 Subbasin Boundary O K E 22 E 03110203 Withlacoochee River 34 HA RDEE C MA NATEE H O B 03110205 Lower Suwannee River 35 E Florida State Boundary Line 18 HIG HLA NDS E 03110206 Santa Fe River 36 ST LUCIE 10 0312 Ochlockonee River 031200 Ochlockonee River 03120001 Apalachee Bay-St. Marks River 37 County Boundary 21 19 DE SO TO SA RA SO TA 11 MA RT IN 03120003 Lower Ochlockonee River 38 12 0313 Apalachicola River 031300 Apalachicola River 03130004 Lower Chattahoochee River 39 0 1 Subbasin Map ID Number Lake Ok eec hobee 03130008 Lower Flint River 40 CHA RLO TTE GLADES 03130011 Apalachicola River 41 20 03130012 Chipola River 42 16 PALM B EA CH 03130013 New River 43 LE E HE NDRY 03130014 Apalachicola Bay 44 13 0314 Choctawhatchee-Escambia Rivers 031401 Florida Panhandle Coastal 03140101 St. Andrew-St. Joseph Bays 45 15 03140102 Choctawhatchee Bay 46 BROWA RD 03140103 Yellow River 47 CO LLIE R 03140104 Blackwater River 48 03140105 Pensacola Bay 49 03140106 Perdido River 50 M O 17 03140107 Perdido Bay 51 N © R O E 031402 Choctawhatchee River 03140202 Pea River 52 MIA MI-DA DE 03140203 Lower Choctawhatchee River 53 031403 Escambia River 03140304 Conecuh River 54 03140305 Escambia River 55 Miles 0 25 50 100 150 200 14 A Hydrologic Unit (HU) represents a surface water drainage area. Each HU is assigned a name and a series of two-digit numbers that designate nested, hierarchical levels of drainage. These levels from highest to lowest levels are: Region, Subregion, Basin, Subbasin, Watershed, and Subwatershed. The table above demonstrates the coding and naming convention for the four highest levels: Region, Date: September 25, 2008 Projection: UTM Zone 17 Subregion, Basin, and Subbasin. For example, the HU code 03110206 represents a drainage area belonging in Region 03, Subregion 0311, Datum: NAD 1983 and Basin 031102. The last two digits, 06, represent the Subbasin named Sante Fe River. Map ID numbers are used only to correlate Source: USDA-NRCS, Gainesville, FL Subbasins delineated on the General Index Map to codes and names in the table. Guidelines: Federal Standards for Delineation of Hydrologic Unit Boundaries; V 2.0