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USGS Daily Statistics for Maryland

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The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01491000 CHOPTANK RIVER NEAR GREENSBORO, MD


Caroline County, Maryland
Hydrologic Unit Code 02060005
Latitude  38°59'49.9", Longitude  75°47'08.9" NAD83
Drainage area 113  square miles
Gage datum 2.73 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1947-10-01 -> 2021-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 204 163 228 248 162 140 64 58 49 89 76 113
2 233 173 236 260 157 145 58 68 48 78 103 113
3 204 206 271 252 162 125 57 64 48 68 123 119
4 181 214 274 225 150 111 60 164 67 61 100 122
5 165 231 260 213 154 113 57 177 58 52 86 125
6 166 226 238 215 161 110 62 131 46 48 91 128
7 161 214 270 205 167 103 62 96 45 48 97 137
8 166 212 271 241 163 143 57 85 44 45 110 196
9 181 195 273 245 153 123 58 81 44 49 106 188
10 183 179 252 224 144 104 69 60 44 58 93 196
11 175 194 231 231 141 111 79 54 62 63 82 161
12 181 216 239 207 144 115 73 60 91 82 79 162
13 183 211 258 204 160 108 111 84 105 80 108 165
14 184 219 315 248 141 115 130 119 64 62 120 205
15 190 226 330 249 123 92 104 92 56 55 118 219
16 178 246 270 299 118 78 80 71 95 49 114 201
17 166 229 254 287 126 118 72 63 126 46 113 191
18 165 217 260 215 130 144 62 59 70 46 109 165
19 194 236 257 178 137 158 55 58 67 55 94 164
20 210 256 274 163 145 152 52 59 64 69 91 158
21 218 222 272 162 144 149 54 59 54 69 98 165
22 215 223 327 155 125 138 58 68 49 59 99 204
23 194 244 304 149 123 137 57 88 51 53 106 186
24 205 317 277 150 124 110 55 72 64 54 100 171
25 229 330 271 162 119 90 59 79 68 65 111 186
26 253 331 242 165 151 90 65 123 67 79 132 197
27 240 285 251 167 165 98 61 104 77 93 122 214
28 238 240 271 180 125 83 60 196 80 90 111 169
29 263 176 300 174 116 73 58 164 69 97 113 165
30 205   294 158 149 64 71 95 76 136 122 172
31 166   271   148   59 58   100   188