U.S. DEPARTMENT OF THE INTERIOR IN COOPERATION WITH THE WATER-RESOURCES INVESTIGATIONS REPORT 00–4064 U.S. GEOLOGICAL SURVEY NATURAL RESOURCE CONSERVATION COMMISSION Location of selected stations—PLATE 1 Lanning-Rush, Jennifer, 2000, Regional equations for estimating mean annual and mean seasonal runoff for natural basins in Texas, base period 1961–90

CIMARRON 1 RIVER

Downstream Beaver 3 River not shown

RIVER

o o 102 BEAVER 100

Creek Punta

De Duro 4 Agua Palo 36o 36o RIVER

Creek

LAKE MEREDITH 2 CANADIAN Sweetwater 12 NORTH Creek FORK RED McC lella RIVER Amarillo n Creek SALT

PRAIRIE FORK RED RIVER

DOG GREENBELT OKLAHOMA TOWN LAKE 11 Region 1 5 FORK

RED RIVER

Creek 7 8 Tule 6 Running 9 Deep BLUE

Water Red PEASE Run Water 10 Black RIVER Mud Draw RIVER 14 15 RIVER 13 92 PEASE o o MIDDLE 98 24 34 RIVER o 22 Creek LAKE RIVER WHITE 34 o WICHITA Creek TEXOMA 96 Draw Beaver WICHITA 26 Yellow RED 16 LAKE Pecan Creek 17 NORTH RIVER KEMP RIVER 21 House Wichita MOSS PAT MAYSE Bayou TRUSCOTT 23 Mineral LAKE RIVER Falls LAKE o BRINE LAKE Creek 27 94 WICHITA ELM 19 LITTLE T FORK R 32 WICHITA 20 97 IN RIVER LAKE Denton I NORTH SOUTH 18 LAKE T Texarkana RAY Y SULPHUR KICKAPOO Big Range E 25 ARROWHEAD Clear RIVER ROBERTS Creek A NORTH WRIGHT FORK RIVER S 30 LAKE T PATMAN Salt Croton FORK Sandy Lubbock WEST Creek F SOUTH COOPER RIVER LAKE DOUBLE Creeek 96 BRAZOS TRINITY Creek O 33 63 SULPHURLAKE 31 Creek RIVER R 109 Creek K 29 RIVER 94 T ek 64 R re SALT I C 98 N k Millers ite Oa LAKE BOB B MOUNTAIN 93 110 LEWISVILLE I h 60 T W l 95 BRIDGEPORT Y 28 SANDLIN a 40 c 39 LAKE Cypress LAKE RESERVOIR R k LAVON FORK . C MOUNTAIN FORK GRAHAM LAKE 35 y GRAPEVINE p Stinking LAKE FORK r e FORK BRAZOS Creek EAGLE LAKE 42 Big Creek s DOUBLE 91 Region 3 POSSUM 65 RESERVOIR s Upstream MOUNTAIN C r ALAN HENRY RIVER KINGDOM 34 e not shown 90 CLEAR LAKE Bear 41 e 102 LAKE k RESERVOIR FORK Creek 61 LAKE O' COLORADO Creek 36 NEW MEXICO LAKE LAKE Little THE PINES 111 RAY SABINE 43 Cypress CLEAR TRINITYWORTH LAKE HUBBARD TAWAKONI 38 California 106 99 FORK HUBBARD CREEK Fort Dallas 37 Creek 105 RESERVOIR BRAZOS Worth BRAZOS RIVER 104 R. 100 108 62 Prairie Creek 138 Deadman 66 LAKE J.B. Pecan Creek BENBROOK Fish 101 Creek LAKE Creek JOE POOL RIVER THOMAS 107 LAKE CEDAR Tyler 103 LAKE LAKE 44 Cat Claw CREEK GRANBURY ARLINGTON RESERVOIR Creek SQUAW CREEK BARDWELL TRINITY 45 Abilene RESERVOIR LAKE 46 218 Creek MARTIN

LAKE COLORADO CITY Creek 51 LAKE Elm River RIVER RIVER o o Beals Pecan Creek Cedar SABANA 32 106 RIVER 112 Region 7 RICHLAND-CHAMBERS El Black o Big Spring A o Midland RESERVOIR N 32 219 104 RIVER Paso 118 NORTH LAKE G Region 10 Bayou WHITNEY NAVARRO E E.V. SPENCE L SABINE RED BLUFF BOSQUE 113 MILL LAKE I River RESERVOIR AQUILLA and Cr. N Delaware RESERVOIR LAKE R ichl A 53 Odessa PROCTOR LEON Creek HORDS CREEK LAKE 68 CONCHO LAKE LAKE 47 67 RIVER Elm RIVER 114 NACOGDOCHES NORTH146 140 NAVASOTA RIVER 139 54 Waco 55 O.C. FISHER Region 4 Cowhouse 116 69 LAKE 133 147 RIVER RIVER NECHES 56 106o PECOS RIVER 115 CONCHO CONCHO WACO 142 O.H. IVIE LAKE Region 2 San Angelo RIVER RESERVOIR BRAZOS MIDDLE TWIN BUTTES RESERVOIR LAKE SAM RAYBURN 145 119 Creek LIMESTONE 143 LAMPASAS RESERVOIR LAKE NASWORTHY Brady Creek RIVER 52 144 BELTON LAKE Creek O 141 STILLHOUSE Little Pond Bedias RIVER

Spring H HOLLOW LAKE Temple Region 8 224 RIVER C Creek 120 Creek 57

N

O RIVER RIVER 117 222 C SABA B.A. STEINHAGEN Dove Creek TRINITY 72 48 H LITTLE 70 LAKE Fort T 129

U 148 149 Stockton LIVINGSTON RIO O SAN 121 RIVER S LAKE 122 71 RIVER RIVER RESERVOIR BUCHANAN S. Fork North Elm 73 GRANGER LAKE Bryan EA Rocky Creek LAKE Creek WEST Region 11 RIVER ST GEORGETOWN F 220 LLANO 128 Davidson O 152 SAN RIVER R Limpia 221 154 126 RIVER K RIVER GABRIEL Creek East S 123 125 127 LAKE A N 153 Georgetown Creek CONROE 49 150 155 124 J Yegua Caney A 75 C 58 RIVER I 74 132 N 223 RIVER LLANO Middle 131 T

Cr. F 84 O 151 Yegua gua O Creek RIVER 158 Ye R 225 NORTH eek LAKE Cr. Cr K 85 50 RIVER SA 86 TRAVIS SOMERVILLE Little N 159 Austin 130 Cypress 77 PEDERNALES LAKE 59 LLANO 157 162 Creek Creek SABINE DEVILS 161 Spring LAKE HOUSTON o o 156 30 30 176 BLANCO Willow 78 79 SOUTH 160 82 Creek Beaumont LAKE Region 9 80 Cedar76 226 174 175 RIVER Plum RIVER CHARLOTTE 177 GUADALUPE San Redgate 81 83 Goose Cr. 179 134 ADDICKS Taylor Bayou Marcos Bayou 180 Creek COLORADO Creek RESERVOIR SAN NUECES 88 SAN Region 5 MEDINA 191 178 CANYON MARCOS Cibolo 163 87 Houston o o Hondo LAKE 94 102 FRIO New BARKER 227 SABINAL WEST Seco 187 189 Braunfels RESERVOIR 192 Clear 188 181 RIVER RIVER 208 207 190 Creek RIVER NAVIDAD GRANDE LAVACA Chocolate Creek 216 205 Creek 182 Creek East 136 NUECES BERNARD135 INTERNATIONAL SAN 165 LAKE Sandies AMISTAD 204 206 San Mustang 89 Bayou 201 CALAVERAS 167 137 RESERVOIR 200 RIVER Antonio Creek o RIVER RIVER LAKE 104 PARKERS CREEK Creek Del Rio 168 RIVER RESERVOIR 183 TRES Galveston ATASCOSA 169 BRAUNIG LAKE ANTONIO 217 PALACIOS RIVER RIVER RIVER 171 228 193 Coleto LEONA 166 MEXICO Garcitas 170 RIVER Creek 164 RIVER 184 172 LAKE 194 RIVER Creek TEXANA RIVER San Perdido 185 Placedo Creek 186 Victoria Creek173 Miguel COLETO CREEK 209 FRIO Creek 213 RESERVOIR 96o 211 212 210 MISSION Copano RIVER Aransas NUECES 196 CHOKE CANYON RIVER RESERVOIR 203 RIVER Creek 195 Cr. EXPLANATION LAKE 198 197 RIO CORPUS CHRISTI Streamflow-gaging stations also used for region 8 analysis 28o 202 199 100o Streamflow-gaging stations also GRANDE used for region 6 analysis Oso Corpus Region 6 Christi 214 Creek Hydrologic-region boundary—Modified from Asquith

Laredo and Slade, 1995 Los 218 Olmos Location of streamflow-gaging station—Number corresponds Kingsville 215 to map number in table 1 Creek GULF OF MEXICO

Note: Regions 1 and 2 combined for 0 20 40 60 80 MILES this study

INTERNATIONAL FALCON RESERVOIR

McAllen Harlingen

o o 98 o 26 26

Brownsville

Digital base from U.S. Geological Survey Scale 1:2,000,000 Albers equal-area projection based on MAP SHOWING LOCATION OF SELECTED STREAMFLOW-GAGING STATIONS Standard parallels 45.5 and 29.5 degrees WITH NATURAL BASINS IN OR NEAR TEXAS By Jennifer Lanning-Rush 2000