Home Archived February 7, 2019
Site Information
01398107   Holland Brook at Readington, NJ
Location:Latitude 40�'30", Longitude 74�'48", Somerset County, Hydrologic Unit 02030105, on right bank 15 ft downstream from bridge on Old York Road, 0.9 mi southeast of Readington, and 2.5 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 MA12.614.7314
Temporal MA22.66.114
Temporal MA3135.87204.18229.58
Spatial MA419.259.365.72
Spatial MA51.272.422.47
Spatial MA66.2222.1451.29
Spatial MA72.948.110.86
Spatial MA82.365.397
Spatialb MA9MA390.411.712.55
Spatial MA100.271.161.69
Spatial MA110.210.931.41
Temporal MA129.5415.5127.4
Temporalbc MA13MA3911.8817.5130.45
Temporal MA1414.621.8138.39
Temporal MA159.9922.133.18
Temporal MA165.9611.3323.22
Temporal MA173.314.6111.5
Temporal MA181.6934.93
Temporal MA191.343.124.69
Temporal MA201.272.495.48
Temporal MA211.833.7811.38
Temporal MA224.6510.1425.33
Temporal MA236.171325.53
Temporal MA2467.84105.65147.6
Temporal MA2558.06102.85141.4
Temporal MA2664.6690.26114.72
Temporal MA2750.9979.18119.23
Temporal MA2842.3996.75150.35
Temporal MA2944.0683.65102.3
Temporal MA3050.0870.8890.25
Temporal MA3137.874.37149.42
Temporal MA3253.4795.58180.61
Temporal MA3348.65114.61194.84
Temporal MA3464.92130.21156.25
Temporal MA3558.5482.44130.67
Spatial MA363.22NC 6.47
Spatial MA370.85NC 1.58
Spatial MA381.480.122.77
Spatiala MA3952.34NC 91.65
Spatialb MA40MA390.17NC 0.33
Temporal MA411.291.681.89
Spatial MA420.91.521.23
Spatial MA430.310.370.48
Spatialb MA44MA390.71.290.93
Spatial MA45-
Low Flow
Temporalc ML12.554.155.65
Temporalc ML23.436.28.95
Temporalc ML34.66.211.25
Temporalc ML44.556.59.2
Temporalc ML52.583.35.1
Temporalc ML61.6823.4
Temporalc ML70.991.352.55
Temporalc ML80.851.351.85
Temporalc ML90.80.961.35
Temporalc ML100.921.31.93
Temporalc ML111.681.954.2
Temporalc ML122.933.86.38
Temporalb ML13ML2054.09651.1198.78
Temporal ML140.120.140.17
Temporalbc ML15ML200.040.060.08
Temporal ML160.120.140.17
Temporal ML170.050.070.12
Spatial ML1841.59094.03
Temporal ML194.396.127.62
Spatiala ML200.320.350.69
Spatialb ML21ML2041.7338.6104.03
Temporal ML220.070.10.11
High Flow
Temporalb MH1MH1629.7569.5258.5
Temporalbc MH2MH163182149.25
Temporalb MH3MH1661133189
Temporal MH421.2589184
Temporal MH513.565.5177.25
Temporal MH67.82058.5
Temporal MH74.531221
Temporal MH83.758.9539.75
Temporal MH969.253
Temporal MH106.22298.75
Temporal MH1118.2565165.75
Temporal MH1221.549.5191.5
Spatial MH1384.29-651.38121.17
Temporal MH1432.6541.4364.56
Spatial MH155.2226.0725.88
Spatiala MH162.535.085.3
Spatial MH171.582.32.38
Spatial MH188.767.2414.44
Spatial MH19-0.19-0.60.72
Temporal MH2020.5833.2242.42
Temporalb MH21MH1636.1343.9344.81
Temporal MH2221.8427.3426.89
Temporal MH2313.9120.8224.95
Temporal MH241.3810.1510
Temporal MH254.3915.3120.78
Temporal MH261021.3726.97
Temporal MH273.281316.64
Index Type
Low FlowSurrogate for
Spatialbc FL1FL37.510.514.25
Spatialb FL2FL339.0444.3463.45
Temporala FL3002
High Flow
Temporal FH1121419.25
Spatial FH220.5531.5934.68
Temporalac FH347.566.577
Temporal FH415.7522.531.5
Temporalb FH5FH311.751416
Temporal FH6111318.25
Temporal FH77.51112.25
Temporal FH8121419.25
Temporalb FH9FH37.751013.25
Temporalb FH10FH311.57
Temporalb FH11FH301.52
Index Type
Low FlowSurrogate for
Temporal DL10.670.931.03
Temporal DL20.70.961.2
Temporal DL30.741.051.35
Temporalac DL41.121.472.02
Temporal DL51.863.287.26
Spatial DL641.7338.6104.03
Spatialb DL7DL438.36098.59
Spatial DL836.64090.53
Spatial DL935.17078.06
Spatial DL1034.36077.84
Temporalb DL11DL40.110.150.17
Temporal DL120.12NC 0.22
Temporal DL130.18NC 0.33
Temporal DL140.320.430.64
Temporal DL150.10.230.43
Temporalb DL16DL45.017.2111.48
Spatial DL1737.3645.3171.88
Temporal DL18000
Spatial DL19NC0NC
Spatial DL20NC 2.32NC
High Flow
Temporal DH1185.25299381.75
Temporalbc DH2DH14117.08155.67177.33
Temporal DH377.7590.79115.89
Temporal DH430.7347.8663.29
Temporal DH519.4428.5640.86
Spatial DH641.2636.3960.21
Spatial DH736.8636.5957.76
Spatial DH837.1343.2649.05
Spatial DH931.4746.4340.45
Spatial DH1029.8947.1237.96
Temporal DH1130.3747.6962.58
Temporalb DH12DH1412.7515.7819
Spatial DH135.047.8810.38
Spatiala DH140.0600.32
Temporal DH154.045.457.21
Spatial DH1633.9346.4669.21
Temporalb DH17DH148.9612.6717.4
Temporal DH183.134.46.07
Temporal DH191.562.042.63
Temporal DH204.045.457.21
Temporal DH2118.3625.5338.2
Temporal DH2226.580110.75
Temporalb DH23DH141.2522.75
Temporal DH2489.5140175.25
Index Type
Average FlowSurrogate for
Spatial TA10.170.160.44
Spatial TA235.9736.261
Spatial TA30.270.390.41
Low Flow
Spatiala TL1241.02256.74266.87
Spatial TL234.139.4244.78
Spatial TL30.430.570.59
Spatial TL40.010.020.11
High Flow
Spatial TH130.9864.94111.47
Spatialb TH2TH362.7164.8874.66
Spatiala TH30.140.20.32
Rate of Change
Index Type
Average FlowSurrogate for
Temporalb RA1RA70.31.739.8
Spatial RA2187.13262.67274.94
Temporalb RA3RA7-3-1-0.3
Spatial RA4-372.11-367.14-184.77
Spatial RA50.240.250.27
Temporalb RA6RA70.10.290.88
Temporalac RA7-0.26-0.14-0.08
Temporalb RA8RA798.75104.5119.25
Spatial RA97.1713.1812.75

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