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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 01104460 STONY BROOK AT RT 20 AT WALTHAM, MA


Middlesex County, Massachusetts
Hydrologic Unit Code 01090001
Latitude  42°22'08", Longitude  71°16'16" NAD27
Drainage area 22.0  square miles
Contributing drainage area 22.0  square miles
Gage datum 89.20 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 1997-10-01 -> 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 45 39 51 95 55 31 29 30 26 30 30 35
2 43 39 54 91 51 32 34 31 39 28 28 34
3 42 43 55 88 48 32 33 30 38 27 27 34
4 44 44 52 89 46 34 32 29 32 27 25 32
5 42 44 50 84 45 33 30 28 29 28 24 31
6 40 42 51 75 45 33 29 28 28 28 26 30
7 40 44 57 72 44 36 29 29 33 27 25 32
8 40 43 61 71 42 44 31 34 30 25 25 34
9 40 40 61 65 40 41 35 33 28 27 25 35
10 50 38 60 61 45 38 38 31 28 26 27 41
11 51 39 58 57 44 39 34 29 27 25 25 47
12 51 40 56 59 40 40 35 29 27 24 24 53
13 54 43 55 61 39 42 36 31 28 23 27 49
14 54 44 77 61 44 56 34 30 28 22 30 46
15 53 41 104 57 44 59 31 30 27 33 30 46
16 49 41 96 67 44 53 31 32 26 32 30 42
17 47 42 86 72 45 45 31 30 26 28 35 42
18 47 46 73 66 40 41 33 29 32 24 32 47
19 47 47 65 60 43 38 31 32 38 24 28 48
20 45 43 61 57 42 35 31 32 32 27 30 43
21 41 40 58 55 41 35 32 32 28 26 28 42
22 37 38 58 52 36 33 33 33 27 24 29 40
23 37 41 63 61 33 37 34 31 26 26 30 42
24 44 46 68 62 32 38 42 33 25 24 32 44
25 52 54 64 55 32 36 40 36 24 28 31 46
26 55 58 57 55 35 33 34 35 27 33 30 47
27 51 53 55 59 35 30 31 31 26 32 33 48
28 48 52 57 57 33 32 32 32 28 32 32 47
29 45 35 69 54 33 31 31 33 31 32 31 46
30 43   86 52 32 29 30 29 32 36 32 47
31 41   97   31   30 27   34   45