Methodology for Estimation of Flood Magnitude and Frequency for New Jersey Streams

Watson, Kara M.; Schopp, Robert D.

doi:10.3133/sir20095167

Cited by 8 publications

(5 citation statements)

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“…At Streamgage Sites-Peak flow is computed as a weighted average of the discharge from the regression equation and the discharge from station data using the procedures outlined in Bulletin 17B (U.S. Water Resources Council, 1981). These values are reported in Watson and Schopp (2009).…”

Section: Methods For Obtaining Peak Flows In New Jerseymentioning

confidence: 95%

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New Jersey StreamStats: A web application for streamflow statistics and basin characteristics

Watson¹,

Janowicz²

2017

Fact Sheet

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StreamStats is an interactive, map-based web application from the U.S. Geological Survey (USGS) that allows users to easily obtain streamflow statistics and watershed characteristics for both gaged and ungaged sites on streams throughout New Jersey. Users can determine flood magnitude and frequency, monthly flow-duration, monthly low-flow frequency statistics, and watershed characteristics for ungaged sites by selecting a point along a stream, or they can obtain this information for streamgages by selecting a streamgage location on the map. StreamStats provides several additional tools useful for water-resources planning and management, as well as for engineering purposes. StreamStats is available for most states and some river basins through a single web portal.

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Section: Methods For Obtaining Peak Flows In New Jerseymentioning

confidence: 95%

“…At Sites on Ungaged Streams-Peak flow is estimated by the regression-based equations offered within New Jersey StreamStats (Watson and Schopp, 2009). Users select a point along a stream, then StreamStats calculates basin characteristics and estimates peak flow.…”

Section: Methods For Obtaining Peak Flows In New Jerseymentioning

confidence: 99%

New Jersey StreamStats: A web application for streamflow statistics and basin characteristics

Watson¹,

Janowicz²

2017

Fact Sheet

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“…The streamgage has a drainage area of 141 square miles. The flood discharges for the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent AEPs were then transferred downstream to the Hughesville Dam location by using techniques described in Watson and Schopp (2009). The mean monthly discharges for the Musconetcong River streamgage were determined from daily mean streamflows from October 1903 to February 2019.…”

Section: Development Of Hydrologymentioning

confidence: 99%

“…The flood discharges for Wreck Pond Brook Outfall site were determined by using StreamStats. These discharges from StreamStats were computed on the basis of the regression equations in Watson and Schopp (2009). The flood discharges modeled on Wreck Pond Brook are shown in table 1.…”

Section: Development Of Hydrologymentioning

confidence: 99%

Hydraulic modeling at selected dam-removal and culvert-retrofit sites in the northeastern United States

Olson¹,

Simeone²

2021

Scientific Investigations Report

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Aquatic connectivity projects, such as removing dams and modifying culverts, have substantial benefits. The restoration of natural flow conditions improves water quality, sediment transport, aquatic and riparian habitat, and fish passage. These projects can also decrease hazards faced by communities by lowering water-surface elevations of flood waters and by removing the risk of dam breaches associated with aging or inadequate infrastructure.This report documents and provides results of one-and two-dimensional hydraulic models developed for selected rivers and streams in the northeastern United States where a dam was removed or a culvert was retrofitted. The models were developed for conditions before and after the dam removal or culvert modification. The discharges applied in the models included monthly discharges and flood discharges for the annual exceedance probabilities of 50, 20, 10, 4, 2, 1, 0.5, and 0.2 percent.This study, by the U.S. Geological Survey in cooperation with the U.S. Fish and Wildlife Service, demonstrates the benefits resulting from dam removal and retrofitting undersized culverts in terms of decreased water-surface elevations during flooding and improved fish passage. The U.S. Army Corps of Engineers Hydrologic Engineering Center's River Analysis System was used to model the sites in one-and twodimensional hydraulics, and decreases in the 1-percent annual exceedance probability discharge water-surface elevation were found at all sites studied. The decreases in water-surface elevation at sites in which the impoundment was removed ranged from 1.3 to 10.4 feet. One site, Bradford Dam in Westerly, Rhode Island, had only a 0.2-foot decrease, but at that site the dam was replaced by a series of weirs to retain the upstream impoundment and allow fish passage.Minimal differences were found between the watersurface elevations computed by the one-and two-dimensional models. The two-dimensional models, however, provide the additional benefit of detailed velocity and depth data throughout the channel at a resolution not possible with a onedimensional model. These velocity and depth data allowed for assessment of the suitability for fish passage at the sites. Fish passage was improved at all the sites by removing the dams and retrofitting the culvert. Prolonged swim velocity criteria for selected fish species were maintained throughout three of the nine study sites, and burst swim velocity criteria were met at all study sites.

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“…A seaward dipping wedge of unconsolidated sediments forms the Coastal Plain in New Jersey; these deposits range in age from the Cretaceous to the late Tertiary Periods. In the Inner Coastal Plain (as defined by Watson and Schopp, 2009), most streams drain to lower, mainly tidal, reaches of the Delaware River ( fig. 1).…”

Section: Study Areamentioning

confidence: 99%

Arsenic in New Jersey Coastal Plain streams, sediments, and shallow groundwater: effects from different geologic sources and anthropogenic inputs on biogeochemical and physical mobilization processes

Barringer¹,

Reilly²,

Eberl³

et al. 2013

Scientific Investigations Report

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Methodology for Estimation of Flood Magnitude and Frequency for New Jersey Streams

Cited by 8 publications

References 0 publications

New Jersey StreamStats: A web application for streamflow statistics and basin characteristics

New Jersey StreamStats: A web application for streamflow statistics and basin characteristics

Hydraulic modeling at selected dam-removal and culvert-retrofit sites in the northeastern United States

Arsenic in New Jersey Coastal Plain streams, sediments, and shallow groundwater: effects from different geologic sources and anthropogenic inputs on biogeochemical and physical mobilization processes

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