Home Archived February 7, 2019
Site Information
01397500   Walnut Brook near Flemington, NJ
Location:Latitude 40�'55", Longitude 74�'51", Hunterdon County, Hydrologic Unit 02030105, 1.2 mi northwest of Flemington, and 2.3 mi upstream from mouth.
Drainage Area:Continuous Period of Record:RemarksSite Type:Baseline Period of Record:Baseline Quality

Hydrologic Indices
Flow RegimeFlow EventIndex NameIndex Value
Index Type
Average FlowSurrogate for25th Percentile*Value75th Percentile*
Temporal MA10.233.193.3
Temporal MA20.231.13.3
Temporal MA3161.81203.37231.32
Spatial MA419.2-929.6565.72
Spatial MA51.272.92.47
Spatial MA66.22121.6751.29
Spatial MA72.9425.6310.86
Spatial MA82.3614.357
Spatialb MA9MA390.4150.382.55
Spatial MA100.2734.031.69
Spatial MA110.2127.951.41
Temporal MA122.283.685.76
Temporalbc MA13MA393.025.27.94
Temporal MA145.216.699.63
Temporal MA153.124.938.58
Temporal MA161.092.664.09
Temporal MA170.320.941.78
Temporal MA180.120.421.18
Temporal MA190.140.41.04
Temporal MA200.110.280.91
Temporal MA210.10.391.14
Temporal MA220.433.91
Temporal MA231.94.286.21
Temporal MA2479.24110.32184.09
Temporal MA2586.01109.63133.92
Temporal MA2674.290.46115.93
Temporal MA2781.86101.4123.33
Temporal MA2863.3592.96116.26
Temporal MA2990.06122.32154.44
Temporal MA30105.92128.8225.39
Temporal MA31104.1159.85225.46
Temporal MA3272.04119.07194.55
Temporal MA3347.71100.18204.56
Temporal MA3465.99131.54187.42
Temporal MA35109.61136.18172.59
Spatial MA363.2297.376.47
Spatial MA370.85NC 1.58
Spatial MA381.48402.77
Spatiala MA3952.34NC 91.65
Spatialb MA40MA390.17NC 0.33
Temporal MA411.21NC 1.61
Spatial MA420.91.041.23
Spatial MA430.310.290.48
Spatialb MA44MA390.70.570.93
Spatial MA45-0.02NC 0.03
Low Flow
Temporalc ML10.50.871.5
Temporalc ML20.671.251.88
Temporalc ML31.11.752.7
Temporalc ML411.42.03
Temporalc ML50.330.521
Temporalc ML60.070.150.34
Temporalc ML700.030.14
Temporalc ML800.040.13
Temporalc ML900.060.11
Temporalc ML100.020.10.3
Temporalc ML110.10.351.1
Temporalc ML120.30.81.2
Temporalb ML13ML2054.09715.2998.78
Temporal ML14000.02
Temporalbc ML15ML20000.01
Temporal ML16000.02
Temporal ML17000.01
Spatial ML1841.59163.1994.03
Temporal ML19000.78
Spatiala ML200.320.30.69
Spatialb ML21ML2041.73151.82104.03
Temporal ML22000.01
High Flow
Temporalb MH1MH169.822.535
Temporalbc MH2MH1614.7527.540.5
Temporalb MH3MH1621.7535.541.25
Temporal MH4132643.25
Temporal MH53.59.624.5
Temporal MH61.336.2510.25
Temporal MH70.42.959.18
Temporal MH80.812.456.45
Temporal MH90.310.979.68
Temporal MH100.361.18.8
Temporal MH111.181841
Temporal MH128.9329.541
Spatial MH1384.29-715.36121.17
Temporal MH1435.4545.2866.21
Spatial MH155.2231.8225.88
Spatiala MH162.536.645.3
Spatial MH171.5832.38
Spatial MH188.768.4114.44
Spatial MH19-0.19-0.560.72
Temporal MH2018.5327.933.15
Temporalb MH21MH1686.3879.9772.6
Temporal MH2231.5936.8637.95
Temporal MH2318.8521.9923.37
Temporal MH241.7314.0620
Temporal MH255.5217.7524.55
Temporal MH261021.6127.73
Temporal MH275.5217.7524.55
Index Type
Low FlowSurrogate for
Spatialbc FL1FL3569
Spatialb FL2FL339.0441.3963.45
Temporala FL33.755.58.25
High Flow
Temporal FH1131417
Spatial FH220.5527.1634.68
Temporalac FH374.585.5102.25
Temporal FH427.7531.541.25
Temporalb FH5FH37.751013
Temporal FH6131417
Temporal FH7121517
Temporal FH8131417
Temporalb FH9FH3579
Temporalb FH10FH3113
Temporalb FH11FH3012.25
Index Type
Low FlowSurrogate for
Temporal DL1000.02
Temporal DL200.010.02
Temporal DL300.010.04
Temporalac DL40.010.050.11
Temporal DL50.150.420.76
Spatial DL641.73151.82104.03
Spatialb DL7DL438.36149.5598.59
Spatial DL836.6414390.53
Spatial DL935.17106.578.06
Spatial DL1034.3691.8777.84
Temporalb DL11DL400.020.02
Temporal DL1200.030.04
Temporal DL130.010.070.1
Temporal DL140.320.210.64
Temporal DL150.10.060.43
Temporalb DL16DL48.5711.8617.08
Spatial DL1737.3671.4771.88
Temporal DL1802.524.75
Spatial DL19NC 161.35NC
Spatial DL20NC 2.56NC
High Flow
Temporal DH141.562.574.25
Temporalbc DH2DH1425.433544.08
Temporal DH316.3922.1125.18
Temporal DH48.319.9412.03
Temporal DH55.86.778.58
Spatial DH641.2631.1760.21
Spatial DH736.8630.9757.76
Spatial DH837.1327.9549.05
Spatial DH931.4723.0240.45
Spatial DH1029.8924.8137.96
Temporal DH1137.7354.2767.5
Temporalb DH12DH1414.919.4922.89
Spatial DH137.559.4210.94
Spatiala DH140.0600.32
Temporal DH154.835.777.34
Spatial DH1633.9327.5969.21
Temporalb DH17DH1414.0616.3823.34
Temporal DH184.835.777.34
Temporal DH192.052.222.59
Temporal DH204.835.777.34
Temporal DH2128.3943.9362.01
Temporal DH2227.4198.5151.88
Temporalb DH23DH14113
Temporal DH2487.5150186.5
Index Type
Average FlowSurrogate for
Spatial TA10.170.250.44
Spatial TA235.9742.1361
Spatial TA30.270.240.41
Low Flow
Spatiala TL1241.02235.64266.87
Spatial TL234.135.8644.78
Spatial TL30.430.510.59
Spatial TL40.010.020.11
High Flow
Spatial TH130.9831.41111.47
Spatialb TH2TH362.7170.1274.66
Spatiala TH30.140.120.32
Rate of Change
Index Type
Average FlowSurrogate for
Temporalb RA1RA70.150.85.1
Spatial RA2187.13200.46274.94
Temporalb RA3RA7-0.9-0.25-0.09
Spatial RA4-372.11-305.81-184.77
Spatial RA50.240.190.27
Temporalb RA6RA70.210.541.31
Temporalac RA7-0.36-0.21-0.13
Temporalb RA8RA7809297
Spatial RA97.1716.9112.75

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