Home Archived February 7, 2019
Site Information
01405300   Matchaponix Brook at Spotswood, NJ
Location:Latitude 40�'52", Longitude 74�'50", Middlesex County, Hydrologic Unit 02030105, on right bank 0.9 mi southeast of Spotswood, 1.1 mi upstream from confluence with Manalapan Brook, and 2.3 mi southwest of Old Bridge.
Drainage Area:Continuous Period of Record:RemarksSite Type:Baseline Period of Record:Baseline Quality
43.91957-1967The flow past this station may be affected by pumpage from well fields for industrial use by Duhernal Water System. Occasional regulation by ponds and lakes above station.A1957-1967POOR

Hydrologic Indices
Flow RegimeFlow EventIndex NameIndex Value
Index Type
Average FlowSurrogate for25th Percentile*Value75th Percentile*
Temporal MA12362.5368
Temporal MA22342.568
Temporal MA3102.15123.04167.68
Spatial MA415.5521.4223.27
Spatial MA51.51.471.81
Spatial MA69.2710.4222
Spatial MA74.134.118.25
Spatial MA83.012.965.36
Spatial MA90.450.630.67
Spatial MA100.290.380.44
Spatial MA110.240.290.35
Temporal MA1251.9476.21104.89
Temporal MA1374.2298.18107.65
Temporal MA1477.26106.71153.64
Temporal MA1557.9778.1115.67
Temporal MA1631.5648.984.52
Temporal MA1717.9734.4742.22
Temporalac MA1826.246.9981.68
Temporal MA198.5235.6556.07
Temporal MA2017.1630.3351.35
Temporal MA2114.4734.159.52
Temporal MA2224.4253.1865.53
Temporal MA2349.8662.2371.25
Temporal MA2445.0658.04112.23
Temporal MA2557.1895.26127.01
Temporalb MA26MA1843.3665.1988.97
Temporal MA2729.1262.786.35
Temporal MA2850.2758.6570.9
Temporal MA2928.4551.0779.14
Temporal MA3050.1138.49180.19
Temporal MA3158.5174.8101.68
Temporal MA3272.1886.05142.85
Temporal MA3347.351.92110.01
Temporal MA3438.4845.0859.57
Temporal MA3556.1366.174.29
Spatial MA364.223.416.16
Spatialb MA37MA181.0311.56
Spatial MA381.911.792.67
Spatialb MA39MA1865.8562.8883.59
Spatial MA400.160.130.33
Temporal MA411.011.421.8
Spatial MA420.980.831.38
Spatial MA430.350.560.46
Spatial MA440.640.810.81
Spatial MA45000.04
Low Flow
Temporalc ML12633.540.25
Temporalc ML231.7535.545.25
Temporalc ML3374552.75
Temporalc ML432.540.546.75
Temporalc ML515.52441.75
Temporalac ML68.411.524.5
Temporalc ML75.289.2517
Temporalc ML85.3312.518.25
Temporalc ML94.231020.5
Temporalc ML109.21724.25
Temporalc ML111125.535.25
Temporalc ML1222.7527.534
Temporalb ML13ML660.1758.6482.11
Temporal ML140.130.150.26
Temporal ML150.080.10.17
Temporalb ML16ML60.130.150.26
Temporal ML170.090.110.17
Spatial ML1839.9159.0868.72
Temporal ML198.439.4917.18
Spatial ML200.440.50.55
Spatial ML2142.5574.0969.33
Temporal ML220.090.140.32
High Flow
Temporal MH1126.5235522.75
Temporal MH2252.5445.5730
Temporal MH3154.5408.5774.5
Temporal MH4106.75266500
Temporalac MH594171266.25
Temporal MH653.568122.5
Temporal MH773.5255702
Temporal MH822.5180265
Temporal MH958.580342.25
Temporal MH1040.75117215
Temporal MH1162.25125172.25
Temporal MH12145.5178.5271
Spatial MH1393.8198.16114.16
Temporal MH1416.8918.3626.21
Spatial MH158.7610.3813.21
Spatialb MH16MH53.082.944.07
Spatial MH171.761.62.22
Spatialb MH18MH54.944.796.87
Spatial MH19-
Temporalb MH20MH515.1118.8221
Temporal MH219.0315.7519.42
Temporal MH225.366.948.16
Temporal MH237.397.848.25
Temporal MH241.364.554.62
Temporal MH253.727.118.59
Temporal MH268.5812.9517.44
Temporal MH272.25.35.71
Index Type
Low FlowSurrogate for
Spatialbc FL1FL36810.25
Spatial FL241.0346.749.22
Temporala FL3000
High Flow
Temporalb FH1FH414.52024.5
Spatial FH225.9331.5235.5
Temporalbc FH3FH416.753153
Temporala FH44.25812.5
Temporal FH514.51519.25
Temporal FH691318.75
Temporal FH72.754.57.25
Temporal FH814.52024.5
Temporalb FH9FH471011
Temporal FH1011.54
Temporal FH1100.51
Index Type
Low FlowSurrogate for
Temporal DL14.136.114
Temporal DL24.496.6714.25
Temporal DL34.818.0415.79
Temporalac DL46.512.7628.46
Temporal DL518.7928.5953.06
Spatialb DL6DL442.5574.0969.33
Spatial DL741.8173.0467.21
Spatial DL840.0372.1362.6
Spatial DL946.6769.1874.66
Spatial DL1045.7757.2572.12
Temporal DL110.10.220.33
Temporalb DL12DL40.110.250.37
Temporal DL130.150.420.67
Temporal DL140.420.540.58
Temporal DL150.210.280.34
Temporalb DL16DL44.59.4916.76
Spatial DL1748.966.3168.18
Temporal DL18000
Spatial DL19NC0NC
Spatial DL20NC0NC
High Flow
Temporal DH1663.5826922
Temporalac DH2434.33506.67657.75
Temporal DH3236.57303.93343.18
Temporal DH4115.99141.48184.66
Temporal DH581.8100.01126.17
Spatial DH641.8733.2657.44
Spatial DH739.6628.9649.95
Spatialb DH8DH233.2820.8241.55
Spatial DH926.1526.1933.42
Spatial DH1025.3733.529.39
Temporal DH1115.6119.6621.69
Temporal DH125.576.968.08
Spatialb DH13DH22.733.524.35
Spatial DH140.10.20.21
Temporal DH153.94.265.67
Spatial DH1630.5628.0746.84
Temporal DH178.4510.6313.85
Temporal DH182.072.312.83
Temporal DH191.381.712
Temporalb DH20DH23.94.265.67
Temporal DH2119.5928.8547.17
Temporal DH22106106158.11
Temporal DH23111.5
Temporal DH24161.75163220.25
Index Type
Average FlowSurrogate for
Spatial TA10.430.440.55
Spatial TA257.7460.864.06
Spatial TA30.250.330.36
Low Flow
Spatiala TL1246.84240.28262.49
Spatial TL232.1733.9741.58
Spatial TL30.460.590.6
Spatial TL40.020.010.04
High Flow
Spatiala TH142.839.4670.44
Spatial TH264.5171.6171.59
Spatial TH30.120.440.38
Rate of Change
Index Type
Average FlowSurrogate for
Temporal RA12939
Spatial RA2211.25222.21271.7
Temporalac RA3-14-4-2
Spatial RA4-289.34-279.18-225.38
Spatialb RA5RA30.280.290.31
Temporal RA60.080.210.56
Temporalb RA7RA3-0.24-0.12-0.07
Temporalb RA8RA391.5103.5108.25
Spatial RA97.9113.9911.49

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