Home Archived February 7, 2019
(i)
Site Information
01403540   Stony Brook at Watchung, NJ
Location:Latitude 40�'11", Longitude 74�'05", Somerset County, Hydrologic Unit 02030105, on right bank at Watchung Borough Administration Building in Watchung, 150 ft downstream from bridge on Mountain Boulevard, 400 ft downstream from East Branch Stony Brook,
Drainage Area:Continuous Period of Record:RemarksSite Type:Baseline Period of Record:Baseline Quality
5.511974-1991Occasional regulation from Watchung and Best Lake directly upstream from station and other small lakes. Channel significantly enlarged and modified in 1991, and modified again in 1997 when the right wall was replaced.D1974-2005POOR

Hydrologic Indices
Flow RegimeFlow EventIndex NameIndex Value
Magnitude
Index Type
Average FlowSurrogate for25th Percentile*Value75th Percentile*
Temporal MA1210.069.7
Temporal MA224.79.7
Temporal MA3153.29192.11222.64
Spatial MA415.5565.5623.27
Spatial MA51.52.141.81
Spatial MA6NC18.18NC
Spatial MA7NC7.06NC
Spatial MA8NC4.85NC
Spatialb MA9MA39NC1.87NC
Spatial MA10NC1.26NC
Spatial MA11NC1.02NC
Temporal MA126.4710.3718.64
Temporalbc MA13MA398.2911.3317.36
Temporal MA148.9312.9721.67
Temporal MA1510.6113.9421.13
Temporal MA165.9410.1419.44
Temporal MA173.355.510
Temporal MA182.023.818.32
Temporal MA191.493.845.57
Temporal MA201.692.895.56
Temporal MA212.653.88.12
Temporal MA223.378.6712.86
Temporal MA234.639.0417.57
Temporal MA2462.8297.95129.71
Temporal MA2547.8492.51136.86
Temporal MA2678.5695.32128.38
Temporal MA2761.3491.41149.48
Temporal MA2898.61115.16148.83
Temporal MA2974.86111.3141.29
Temporal MA30120.06152.37224.66
Temporal MA3169.08116.78155.79
Temporal MA32111.66159.12246.54
Temporal MA33118.21149.3220.83
Temporal MA34109.22142.76174.45
Temporal MA3557.26105.41143.54
Spatial MA36NC4.72NC
Spatial MA37NC1.34NC
Spatial MA38NC2.29NC
Spatiala MA39NC82.07NC
Spatialb MA40MA39NC0.27NC
Temporal MA411.451.832.26
Spatial MA42NC1.08NC
Spatial MA43NC0.46NC
Spatialb MA44MA39NC0.94NC
Spatial MA45NC0.05NC
Low Flow
Temporalc ML12.33.64.63
Temporalc ML22.684.755.48
Temporalc ML33.484.55.3
Temporalc ML42.884.655.43
Temporalc ML51.21.852.6
Temporalc ML61.081.32.4
Temporalc ML70.670.871.7
Temporalc ML80.440.951.23
Temporalc ML90.480.791.03
Temporalc ML100.751.081.8
Temporalc ML1111.452.83
Temporalc ML1223.154.23
Temporalb ML13ML20NC76.62NC
Temporal ML140.090.150.19
Temporalbc ML15ML200.050.070.1
Temporal ML160.090.150.19
Temporal ML170.050.070.11
Spatial ML18NC52.22NC
Temporal ML194.536.6910.15
Spatiala ML20NC0.33NC
Spatialb ML21ML20NC46.56NC
Temporal ML220.070.140.16
High Flow
Temporalb MH1MH1621.7551.5147
Temporalbc MH2MH1621.7554.5116.75
Temporalb MH3MH1637.7560.5143.5
Temporal MH43574156.75
Temporal MH533.550.597.5
Temporal MH616.2532.554.75
Temporal MH714.524.581.75
Temporal MH85.0315.551.25
Temporal MH911.1520.580.5
Temporal MH1016.2537.567
Temporal MH1120.7543.5106.75
Temporal MH1218.7558.5104.5
Spatial MH13NC103.84NC
Temporal MH1431.3846.1460.29
Spatial MH15NC22.82NC
Spatiala MH16NC4.26NC
Spatial MH17NC2.06NC
Spatial MH18NC7.35NC
Spatial MH19NC-0.27NC
Temporal MH2029.5435.345.28
Temporalb MH21MH1620.0824.6329.02
Temporal MH2210.8413.8515.54
Temporal MH2310.4713.1416.1
Temporal MH241.598.258.94
Temporal MH254.4711.6413.4
Temporal MH269.1517.6321.49
Temporal MH273.410.1811.7
Frequency
Index Type
Low FlowSurrogate for
Spatialbc FL1FL38.751317
Spatialb FL2FL3NC43.21NC
Temporala FL3003
High Flow
Temporal FH1202327.25
Spatial FH2NC19.85NC
Temporalac FH3415469.5
Temporal FH415.252024.25
Temporalb FH5FH317.7519.523
Temporal FH61721.527
Temporal FH7101415.25
Temporal FH8202327.25
Temporalb FH9FH39.51417.25
Temporalb FH10FH312.57.25
Temporalb FH11FH3012.25
Duration
Index Type
Low FlowSurrogate for
Temporal DL10.410.770.9
Temporal DL20.460.810.94
Temporal DL30.560.851.05
Temporalac DL40.841.361.77
Temporal DL52.33.475.56
Spatial DL6NC46.56NC
Spatialb DL7DL4NC45.47NC
Spatial DL8NC46.22NC
Spatial DL9NC46.08NC
Spatial DL10NC53.52NC
Temporalb DL11DL40.090.150.19
Temporal DL120.120.180.22
Temporal DL130.180.320.38
Temporal DL14NC0.43NC
Temporal DL15NC0.23NC
Temporalb DL16DL45.356.357.79
Spatial DL17NC36.14NC
Temporal DL18000
Spatial DL19NC424.26NC
Spatial DL20NC0NC
High Flow
Temporal DH1162.75194.5249.5
Temporalbc DH2DH1480.58100.33129.25
Temporal DH346.764.0772.21
Temporal DH421.2824.6238.34
Temporal DH515.117.2724.43
Spatial DH6NC38NC
Spatial DH7NC34.52NC
Spatial DH8NC28.97NC
Spatial DH9NC36.93NC
Spatial DH10NC32.19NC
Temporal DH1134.6344.8853.09
Temporalb DH12DH149.9412.8715.36
Spatial DH134.536.088.16
Spatiala DH14NC0.14NC
Temporal DH152.873.694.94
Spatial DH16NC37.72NC
Temporalb DH17DH147.310.1410.97
Temporal DH181.872.433.02
Temporal DH191.331.421.61
Temporal DH202.873.694.94
Temporal DH2115.319.3627.91
Temporal DH2237.3383.22127.13
Temporalb DH23DH14113
Temporal DH2498172192.5
Timing
Index Type
Average FlowSurrogate for
Spatial TA10.430.150.55
Spatial TA257.7433.264.06
Spatial TA3NC0.29NC
Low Flow
Spatiala TL1246.84249.4262.49
Spatial TL232.1739.4141.58
Spatial TL3NC0.84NC
Spatial TL40.029999990.04
High Flow
Spatial TH142.854.9170.44
Spatialb TH2TH364.5160.871.59
Spatiala TH30.120.160.38
Rate of Change
Index Type
Average FlowSurrogate for
Temporalb RA1RA70.4210.28
Spatial RA2NC237.82NC
Temporalb RA3RA7-2.5-0.7-0.2
Spatial RA4NC-335.97NC
Spatial RA50.280.270.31
Temporalb RA6RA70.130.391.06
Temporalac RA7-0.35-0.15-0.09
Temporalb RA8RA7117122.5127.25
Spatial RA97.914.9811.49

a primary index as determined from the New Jersey Hydrologic Integrity Assessment Process (Henriksen and others, 2006; Kennen and others, 2007)
b surrogate index as determined from the New Jersey Hydrologic Integrity Assessment Process (Henriksen and others, 2006; Kennen and others, 2007)
c primary regulatory index for the New Jersey Department of Environmental Protection (J.L. Hoffman, NJDEP, written commun., 2007).

# indicates that site is an index station

* If the index is spatial, percentile values are from the distribution of values for the selected index for all sites of the same stream type if the index is spatial

** These sites are index sites, which are considered to be relatively undeveloped (least amount of urbanization, less than 15% urban landuse) for a long period of record (at least 50 years). The entire period of record for these sites are considered baseline.

NC value could not be calculated