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USGS Daily Statistics for Massachusetts

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ICE EFFECTS ON STREAMFLOW

The formation of ice on rivers can cause discharge values to appear unusually high. Display of these erroneous discharge data may result in improper assessment of flow conditions and misuse of the data. For this reason, display of discharge values for streams significantly affected by ice may be disabled from view. Display of discharge data will resume when ice conditions are no longer present. Discharge values for streams minimally affected by ice will continue to be displayed. Flows for streams with these conditions appear to increase during the night and decrease to near-base-line conditions around midday. To estimate the correct discharge for these streams, use the flow rate that corresponds to the bottom of the discharge curve, rather than the peak that corresponds to the top of the curve. Note that this method of estimation is possible only when no surface runoff is occurring. Daily mean discharges for periods of both significant and minimal ice-effect will be estimated and published in the Annual Water-Data Report for the water year in which they occurred.


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 01115187 PONAGANSET RIVER AT SOUTH FOSTER, RI


Providence County, Rhode Island
Hydrologic Unit Code 01090004
Latitude  41°49'07", Longitude  71°42'20" NAD27
Drainage area 14.4  square miles
Contributing drainage area 14.4  square miles
Gage datum 348.2 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 1993-10-01 -> 2025-09-30)

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 38 33 51 71 48 20 17 3.9 2.9 9.1 21 37
2 40 37 58 64 39 22 15 3.3 18 7.5 18 37
3 39 45 62 61 35 22 12 3.2 7.3 9.9 21 33
4 43 44 51 65 36 23 11 2.8 5.1 9.5 18 28
5 41 49 45 60 35 20 10 3.5 4.3 11 16 26
6 40 44 46 49 35 20 8.4 3.6 7.4 9.2 16 30
7 36 42 60 49 31 40 8.1 3.1 9 8.4 18 34
8 36 39 53 51 30 44 9.9 6.1 11 6.9 17 45
9 38 37 58 47 31 23 16 5.3 8.2 10 20 33
10 56 36 60 46 38 20 15 5.2 6.6 8.7 23 37
11 47 37 50 40 34 21 12 3.9 5.1 8.4 20 55
12 49 41 50 46 30 22 11 3.6 4.8 11 21 61
13 63 43 49 55 30 28 11 6.9 7.1 9.4 28 48
14 51 47 71 66 37 43 12 7.8 8.4 13 24 48
15 48 41 66 46 30 26 9.5 7.7 4.7 33 25 44
16 49 41 54 70 37 19 12 8.3 6.8 18 25 38
17 44 43 52 62 34 28 13 5.1 10 14 32 47
18 44 50 49 47 30 26 11 5.6 9.4 12 27 75
19 52 47 47 46 33 22 8.7 4.8 12 11 24 51
20 51 40 48 43 29 20 6.5 3.7 6.3 29 22 43
21 42 37 49 45 27 14 5.4 3.3 4.6 23 20 43
22 38 40 72 47 21 13 4.8 7.1 4.5 23 27 40
23 40 43 67 52 19 16 5.3 6.6 6.4 16 32 44
24 61 52 69 48 21 16 15 6.2 9.4 14 34 51
25 68 62 51 38 23 21 9.9 4 9.6 18 30 64
26 60 61 45 39 24 14 7.8 3.3 15 19 30 51
27 48 47 50 50 26 11 6 3.1 10 18 35 47
28 51 48 53 42 20 11 5.3 8.4 8.9 26 32 45
29 42 43 74 38 21 11 5.4 8.6 14 32 30 39
30 37   103 34 24 19 4.9 5.2 15 42 28 41
31 36   72   20   4.5 3.6   29   37