Home Archived February 7, 2019
Site Information
01408000   Manasquan River at Squankum, NJ
Location:Latitude 40�'41", Longitude 74�'17", Monmouth County, Hydrologic Unit 02040301, on right bank 50 ft upstream from northbound bridge on County Highway 547 (Squankum Park Road) in Squankum, and 0.4 mi downstream from Marsh Bog Brook .
Drainage Area:Continuous Period of Record:RemarksSite Type:Baseline Period of Record:Baseline Quality
441931-2005Since 1990, 3.18 mi2 controlled by Manasquan Reservoir located on Timber Swamp Brook.A1931-1956EXCELLENT

Hydrologic Indices
Flow RegimeFlow EventIndex NameIndex Value
Index Type
Average FlowSurrogate for25th Percentile*Value75th Percentile*
Temporal MA13571.5380
Temporal MA2355280
Temporal MA368.7591.26110.08
Spatial MA415.551423.27
Spatial MA51.51.381.81
Spatial MA69.274.8522
Spatial MA74.132.818.25
Spatial MA83.012.295.36
Spatial MA90.450.40.67
Spatial MA100.290.260.44
Spatial MA110.240.210.35
Temporal MA1254.7277.55109.06
Temporal MA1374.5596.05119.37
Temporal MA1488.9106.4117.69
Temporal MA1567.2393.5112.95
Temporal MA1655.8468.8984.8
Temporal MA1734.1342.8256.29
Temporalac MA1825.3235.6961.61
Temporal MA1927.1441.1368.28
Temporal MA2028.8944.3567.33
Temporal MA2132.754151.1
Temporal MA2244.3864.7102.11
Temporal MA2349.6772.7198.35
Temporal MA2433.7643.156.71
Temporal MA2543.8357.3881.96
Temporalb MA26MA1832.3354.0874.02
Temporal MA2738.5150.6867.15
Temporal MA2827.7643.7859.25
Temporal MA2924.8139.465.5
Temporal MA3020.0637.8677.24
Temporal MA3136.7550.1985.59
Temporal MA3214.1144.1898.76
Temporal MA3321.9737.4478.88
Temporal MA3427.1360.4489.19
Temporal MA3535.3252.482.67
Spatial MA364.222.786.16
Spatialb MA37MA181.030.861.56
Spatial MA381.911.382.67
Spatialb MA39MA1865.8550.9183.59
Spatial MA400.160.080.33
Temporal MA411.341.631.94
Spatial MA420.980.921.38
Spatial MA430.350.40.46
Spatial MA440.640.750.81
Spatial MA4500.080.04
Low Flow
Temporalc ML1354755.25
Temporalc ML239.7548.564
Temporalc ML34855.569.5
Temporalc ML4475262.25
Temporalc ML5344250.25
Temporalac ML6252935
Temporalc ML72024.529
Temporalc ML817.752228.25
Temporalc ML918.7525.533.25
Temporalc ML1023.752834.25
Temporalc ML113336.542.5
Temporalc ML1231.754148
Temporalb ML13ML660.1741.7782.11
Temporal ML140.340.370.48
Temporal ML150.260.290.33
Temporalb ML16ML60.340.370.48
Temporal ML170.260.30.33
Spatial ML1839.9122.3868.72
Temporal ML1925.528.9233.11
Spatial ML200.440.630.55
Spatial ML2142.5523.3869.33
Temporal ML220.390.430.55
High Flow
Temporal MH1143.5233.5315.5
Temporal MH2245320468.25
Temporal MH3221.75354436.5
Temporal MH4176261.5374.25
Temporalac MH5104.5174.5282.75
Temporal MH658119224.25
Temporal MH74088.5219.25
Temporal MH870.5122.5310
Temporal MH939.25124364
Temporal MH1067.5101181
Temporal MH1188.5202452.25
Temporal MH12135.25221326.75
Spatial MH1393.8192.96114.16
Temporal MH148.6511.2714.79
Spatial MH158.767.2313.21
Spatialb MH16MH53.082.424.07
Spatial MH171.761.542.22
Spatialb MH18MH54.946.986.87
Spatial MH19-0.070.360.41
Temporalb MH20MH510.914.1318.24
Temporal MH211012.714.31
Temporal MH223.314.334.74
Temporal MH235.94.863.81
Temporal MH241.273.564.08
Temporal MH253.735.996.79
Temporal MH267.9911.0511.58
Temporal MH271.964.315.1
Index Type
Low FlowSurrogate for
Spatialbc FL1FL36914
Spatial FL241.0353.6249.22
Temporala FL3000
High Flow
Temporalb FH1FH414.751820.25
Spatial FH225.9332.0835.5
Temporalbc FH3FH41221.535.25
Temporala FH4137
Temporal FH5121519.25
Temporal FH67.751318
Temporal FH712.55
Temporal FH814.751820.25
Temporalb FH9FH479.513.5
Temporal FH1011.54.5
Temporal FH11001
Index Type
Low FlowSurrogate for
Temporal DL1171924.25
Temporal DL217.5819.8324.5
Temporal DL318.5421.2125.5
Temporalac DL420.4224.1529.68
Temporal DL526.8334.6543.54
Spatialb DL6DL442.5523.3869.33
Spatial DL741.8123.3867.21
Spatial DL840.0324.262.6
Spatial DL946.6729.6774.66
Spatial DL1045.7741.3472.12
Temporal DL110.330.40.47
Temporalb DL12DL40.360.430.49
Temporal DL130.390.510.57
Temporal DL140.420.670.58
Temporal DL150.210.50.34
Temporalb DL16DL46.11914.32
Spatial DL1748.947.1768.18
Temporal DL18000
Spatial DL19NC0NC
Spatial DL20NC0NC
High Flow
Temporal DH1479.75621.5802.5
Temporalac DH2327.42373.83457.42
Temporal DH3203.82236.29316.57
Temporal DH4115.82144.53168.81
Temporal DH594.68113.67133.74
Spatial DH641.8750.2457.44
Spatial DH739.6645.7749.95
Spatialb DH8DH233.2837.7241.55
Spatial DH926.1525.6733.42
Spatial DH1025.3724.6629.39
Temporal DH119.2313.4815.43
Temporal DH123.925.066.09
Spatialb DH13DH22.232.793.25
Spatial DH140.10.330.21
Temporal DH153.224.256.89
Spatial DH1630.5653.7846.84
Temporal DH177.8213.4315.77
Temporal DH181.621.711.92
Temporal DH19111.38
Temporalb DH20DH23.224.256.89
Temporal DH2117.7329.4839.36
Temporal DH229.5256.42185.63
Temporal DH23112
Temporal DH2459240316
Index Type
Average FlowSurrogate for
Spatial TA10.430.580.55
Spatial TA257.7467.3664.06
Spatial TA30.250.360.36
Low Flow
Spatiala TL1246.84242.87262.49
Spatial TL232.1728.4341.58
Spatial TL30.460.470.6
Spatial TL40.020.030.04
High Flow
Spatiala TH142.816.9470.44
Spatial TH264.5164.7571.59
Spatial TH30.120.320.38
Rate of Change
Index Type
Average FlowSurrogate for
Temporal RA12939
Spatial RA2211.25224.17271.7
Temporalac RA3-12-4-2
Spatial RA4-289.34-288.37-225.38
Spatialb RA5RA30.280.270.31
Temporal RA60.060.160.46
Temporalb RA7RA3-0.18-0.08-0.04
Temporalb RA8RA3108.75115.5123
Spatial RA97.918.4111.49

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