Home Archived February 7, 2019
Site Information
01402600   Royce Brook Tributary near Belle Mead, NJ
Location:Latitude 40�'57", Longitude 74�'04", Somerset County, Hydrologic Unit 02030105, on right bank 25 ft upstream from bridge on County Highway 514, 1,200 ft upstream from mouth, and 2.0 mi north of Belle Mead.
Drainage Area:Continuous Period of Record:RemarksSite Type:Baseline Period of Record:Baseline Quality
1.21966-1980Some regulation from storm water detention basin 542 ft upstream of gage since 1980, which reduces flood peaks and augments low flow.D1966-1975POOR

Hydrologic Indices
Flow RegimeFlow EventIndex NameIndex Value
Index Type
Average FlowSurrogate for25th Percentile*Value75th Percentile*
Temporal MA10.172.451.8
Temporal MA20.170.71.8
Temporal MA3200.12248.2323.6
Spatial MA415.55-278.2323.27
Spatial MA51.53.51.81
Spatial MA6NC100NC
Spatial MA7NC19.17NC
Spatial MA8NC10.59NC
Spatialb MA9MA39NC-12.91NC
Spatial MA10NC-8.28NC
Spatial MA11NC-6.62NC
Temporal MA121.652.633.35
Temporalbc MA13MA391.993.374.09
Temporal MA141.993.264.15
Temporal MA150.881.844.31
Temporal MA160.530.962.73
Temporal MA170.120.271.94
Temporal MA180.10.851.74
Temporal MA190.321.243.83
Temporal MA200.060.343.13
Temporal MA210.321.392.22
Temporal MA220.871.633.59
Temporal MA232.583.145.4
Temporal MA2496.31120.34226.36
Temporal MA25137.38156.05236.38
Temporal MA26100.87139.53170.76
Temporal MA2793.93125.11208.72
Temporal MA28127.29158.39187.54
Temporal MA29113.34166.07321.31
Temporal MA30112.71178.24374.85
Temporal MA31155.07248.47289.99
Temporal MA3299.6148.57299.12
Temporal MA3375.46244.42305.22
Temporal MA34100.67165.35194.3
Temporal MA35134.47179.4205.16
Spatial MA36NCNCNC
Spatial MA37NCNCNC
Spatial MA38NCNCNC
Spatiala MA39NC-1.#IONC
Spatialb MA40MA39NCNCNC
Temporal MA411.682.112.73
Spatial MA42NC0.97NC
Spatial MA43NC0.55NC
Spatialb MA44MA39NC0.97NC
Spatial MA45NC0.09NC
Low Flow
Temporalc ML10.170.280.77
Temporalc ML20.040.10.47
Temporalc ML30.320.40.57
Temporalc ML40.110.30.78
Temporalc ML50.090.10.17
Temporalc ML60.010.030.09
Temporalc ML700.050.07
Temporalc ML800.020.1
Temporalc ML900.062.14
Temporalc ML1000.070.21
Temporalc ML110.050.150.5
Temporalc ML120.330.40.78
Temporalb ML13ML20NC381.62NC
Temporal ML14000.04
Temporalbc ML15ML20000.01
Temporal ML16000.04
Temporal ML17000.02
Spatial ML18NCNCNC
Temporal ML19000.96
Spatiala ML20NC0.15NC
Spatialb ML21ML20NC248.62NC
Temporal ML22000.02
High Flow
Temporalb MH1MH16111826.5
Temporalbc MH2MH1614.52544
Temporalb MH3MH169.92131.5
Temporal MH45.251138.5
Temporal MH53.156.321
Temporal MH60.891.931.5
Temporal MH70.786.633
Temporal MH84.141267.5
Temporal MH90.411.436
Temporal MH102.251229.5
Temporal MH114.951527.5
Temporal MH12212743
Spatial MH13NC-381.63NC
Temporal MH1458.3182.71192.55
Spatial MH15NC48.57NC
Spatiala MH16NC7.43NC
Spatial MH17NC2.71NC
Spatial MH18NC11.29NC
Spatial MH19NC0.84NC
Temporal MH2039.1749.1773.75
Temporalb MH21MH1649.1952.0551.61
Temporal MH2231.293331.07
Temporal MH2327.6629.6327.68
Temporal MH242.1420.7831.43
Temporal MH256.1423.3532.5
Temporal MH2612.5730.1635.71
Temporal MH276.1123.4333.21
Index Type
Low FlowSurrogate for
Spatialbc FL1FL3101119.5
Spatialb FL2FL3NC63.64NC
Temporala FL381116.5
High Flow
Temporal FH1182129
Spatial FH2NC30.5NC
Temporalac FH354.57787.5
Temporal FH4243143.5
Temporalb FH5FH314.51922
Temporal FH617.52229
Temporal FH712.51924.5
Temporal FH8182129
Temporalb FH9FH3101419.5
Temporalb FH10FH3136.5
Temporalb FH11FH30.523.5
Index Type
Low FlowSurrogate for
Temporal DL1000.02
Temporal DL2000.03
Temporal DL3000.04
Temporalac DL40.010.040.15
Temporal DL50.30.41.17
Spatial DL6NC248.62NC
Spatial DL10NCNCNC
Temporalb DL11DL400.040.03
Temporal DL120-1.#IO0.06
Temporal DL130.01-1.#IO0.21
Temporal DL14NC0.31NC
Temporal DL15NC0.13NC
Temporalb DL16DL45.886.489.99
Spatial DL17NC42.73NC
Temporal DL1802235
Spatial DL19NC91.09NC
Spatial DL20NC6.48NC
High Flow
Temporal DH1475988.5
Temporalbc DH2DH1421.727.941.43
Temporal DH312.6715.3820.76
Temporal DH45.126.5111.36
Temporal DH53.333.726.92
Spatial DH6NC54.72NC
Spatial DH7NC53.58NC
Spatial DH8NC46.34NC
Spatial DH9NC59.53NC
Spatial DH10NC63.4NC
Temporal DH1167.14101.75126.43
Temporalb DH12DH1418.125.7229.66
Spatial DH137.3112.3416.23
Spatiala DH14NCNCNC
Temporal DH152.943.64.03
Spatial DH16NC19.1NC
Temporalb DH17DH147.139.912.44
Temporal DH182.723.233.85
Temporal DH191.571.711.92
Temporal DH202.943.64.03
Temporal DH2112.0118.0728.26
Temporal DH2211.564106.75
Temporalb DH23DH14134
Temporal DH2487.5168185.5
Index Type
Average FlowSurrogate for
Spatial TA10.430.380.55
Spatial TA257.7460.1664.06
Spatial TA3NC0.22NC
Low Flow
Spatiala TL1246.84243.37262.49
Spatial TL232.1755.0941.58
Spatial TL3NC0.52NC
Spatial TL40.029999990.04
High Flow
Spatial TH142.8172.0570.44
Spatialb TH2TH364.5173.5471.59
Spatiala TH30.120.140.38
Rate of Change
Index Type
Average FlowSurrogate for
Temporalb RA1RA70.10.543.51
Spatial RA2NC241.96NC
Temporalb RA3RA7-0.9-0.21-0.09
Spatial RA4NC-344.42NC
Spatial RA50.280.250.31
Temporalb RA6RA70.270.691.76
Temporalac RA7-0.69-0.36-0.18
Temporalb RA8RA7103.5113123
Spatial RA97.9124.1211.49

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