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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 90 feet above NGVD29
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for 17 - 19 years of record in, ft3/s   (Calculation Period 1997-10-01 -> 2019-09-30)

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 41 38 54 105 45 32 31 32 25 31 30 39
2 41 38 57 100 44 34 34 33 25 28 28 38
3 40 44 58 93 42 34 32 31 25 28 28 38
4 44 43 53 89 40 38 30 30 24 27 26 35
5 41 44 51 84 40 37 28 28 24 26 25 32
6 40 43 49 76 42 37 28 28 25 26 27 30
7 39 46 52 74 42 42 28 28 33 25 26 32
8 40 43 59 73 41 53 32 29 31 24 26 37
9 41 39 62 66 38 49 33 29 29 28 27 38
10 40 38 58 62 45 44 33 30 26 27 29 44
11 40 38 56 58 46 43 30 28 25 27 27 41
12 43 40 56 59 40 44 31 28 25 26 25 49
13 46 43 55 61 40 49 31 33 27 24 27 49
14 47 45 79 61 47 67 29 30 26 23 30 46
15 49 43 113 57 47 70 27 30 25 37 30 46
16 45 41 107 69 47 62 28 33 24 36 31 42
17 40 42 94 77 49 52 27 30 24 28 38 40
18 42 46 79 69 45 46 28 28 30 24 35 40
19 45 48 69 60 49 42 27 27 31 25 30 36
20 42 44 66 57 47 38 27 26 28 30 33 35
21 38 41 63 55 41 35 30 28 25 28 30 38
22 35 40 63 52 36 34 30 29 25 26 31 39
23 36 41 67 57 33 40 31 27 25 28 31 40
24 45 48 65 58 32 42 44 26 25 26 34 43
25 54 59 61 53 33 41 43 28 24 31 33 42
26 52 64 55 54 38 38 35 27 27 35 32 42
27 47 57 54 55 39 34 31 27 27 30 37 46
28 46 55 55 53 35 35 33 30 30 30 36 47
29 43 34 65 51 32 32 32 33 32 32 34 45
30 41   89 47 31 30 31 28 33 38 36 46
31 39   107   29   31 25   34   41