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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 -> 2020-09-30)

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
1 206 164 229 248 161 141 64 58 48 78 76 114
2 235 174 237 261 156 146 58 69 47 72 104 113
3 206 207 273 253 161 125 58 64 46 65 124 120
4 182 215 276 226 149 111 60 157 43 59 101 122
5 166 233 262 214 151 113 57 155 42 51 87 126
6 166 227 240 216 160 110 62 120 39 46 92 129
7 162 214 271 206 166 103 60 86 42 47 97 138
8 166 209 273 242 162 144 55 76 42 45 111 198
9 181 195 275 246 152 124 58 69 43 49 107 190
10 184 179 254 225 144 105 69 54 41 59 94 198
11 176 194 233 233 141 111 75 51 52 64 82 161
12 182 213 241 208 144 116 69 59 80 83 79 162
13 184 208 260 204 161 109 111 81 100 81 108 166
14 186 215 317 244 142 116 130 110 61 63 121 206
15 191 224 333 246 123 92 104 83 54 56 119 220
16 179 246 272 299 118 78 80 64 94 50 115 202
17 167 229 256 288 126 119 72 56 125 46 114 192
18 167 217 263 215 130 146 62 54 69 46 110 166
19 195 237 259 178 137 159 56 55 65 56 95 165
20 212 258 276 163 146 153 52 57 63 70 91 159
21 220 223 273 162 145 148 54 57 53 69 99 167
22 217 224 329 156 126 138 59 66 48 59 100 206
23 195 246 306 150 122 138 57 87 51 53 107 187
24 207 319 277 147 120 111 55 71 63 54 100 173
25 230 333 270 153 117 90 59 79 68 66 112 188
26 251 333 242 160 151 91 65 123 66 80 133 199
27 239 287 252 165 165 99 61 104 74 94 123 216
28 239 241 272 179 125 84 60 198 77 90 112 171
29 264 179 298 173 116 74 58 164 67 97 114 167
30 206   294 158 150 64 72 94 68 137 123 173
31 167   272   149   59 57   101   189