Trends of Selected Ground‐Water Constituents from Infiltration Galleries, Southeast Nassau County, New York<sup>a</sup>

Sulam, Dennis J.; Ku, Henry F. H.

doi:10.1111/j.1745-6584.1977.tb03192.x

Cited by 9 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the lack of forest cover may reduce high transpiration losses by woody vegetation (Whitehead and Robinson, 1993). Baseflow levels of urban streams have been reported as being lower than in rural areas due to the high impervious surface coverage, which reduces infiltration, and sanitary sewerage (Sulam and Ku, 1977; Simmons and Reynolds, 1982). Groundwater inputs likely contribute to streamflow generation in both managed and unmanaged forested watersheds throughout the year, as opposed to urban and developing watersheds where, possibly because of lower evapotranspiration, discharge did not increase during the winter.…”

Section: Resultsmentioning

confidence: 99%

Impacts of Land Cover on Stream Hydrology in the West Georgia Piedmont, USA

2006

View full text Add to dashboard Cite

The southeastern United States is experiencing rapid urban development. Consequently, Georgia's streams are experiencing hydrologic alterations from extensive development and from other land use activities such as livestock grazing and silviculture. A study was performed to assess stream hydrology within 18 watersheds ranging from 500 to 2500 ha. Study streams were first, second, or third order and hydrology was continuously monitored from 29 July 2003 to 23 September 2004 using InSitu pressure transducers. Rating curves between stream stage (i.e., water depth) and discharge were developed for each stream by correlating biweekly discharge measurements and stage data. Dependent variables were calculated from discharge data and placed into 4 categories: flow frequency (i.e., the number of times a predetermined discharge threshold is exceeded), flow magnitude (i.e., maximum and minimum flows), flow duration (i.e., the amount of time discharge was above or below a predetermined threshold), and flow predictability and flashiness. Fine resolution data (i.e., 15-min interval) were also compared to daily discharge data to determine if resolution affected how streams were classified hydrologically. Urban watersheds experienced flashy discharges during storm events, whereas pastoral and forested watersheds showed less flashy hydrographs. Also, in comparison to all other flow variables, flow frequency measures were most strongly correlated to land cover. Furthermore, the stream hydrology was explained similarly with both the 15-min and daily data resolutions.

show abstract

Section: Resultsmentioning

confidence: 99%

Impacts of Land Cover on Stream Hydrology in the West Georgia Piedmont, USA

2006

View full text Add to dashboard Cite

show abstract

“…Corrections were made on stream hydrographs that showed diversion of stream flow t o ponds and wells or t o infiltration galleries for New York City Water Supply. (The history of New York City's auxiliary water-supply system has been described by Sulam and Ku, 1977. ) Daily mean base-flow values for each stream were averaged to obtain annual mean base-flow figures; these in turn were divided by annual mean stream flow to yield base flow as a percentage of total annual stream flow (hereafter called percent base flow) for each year of record through 1970.…”

Section: Determination Of Base Flowmentioning

confidence: 99%

EFFECTS OF URBANIZATION ON BASE FLOW OF SELECTED SOUTH‐SHORE STREAMS, LONG ISLAND, NEW YORK¹

Simmons

Reynolds

1982

J American Water Resour Assoc

122

View full text Add to dashboard Cite

Hydrograph analysis of six streams on the south shore of Long Island indicates that eastward urbanization during the last three decades has significantly reduced base flow to streams. Before urbanization, roughly 95 percent of total annual stream flow on Long Island was base flow. In urbanized southwestern Nassau County, storm water sewerage, increased impervious surface area, and sanitary sewerage have reduced base flow to 20 percent of total stream flow. In an adjacent urbanized but unsewered area in southeastern Nassau County, base flow has decreased to 84 percent of total annual stream flow. In contrast, base flow in two streams in rural areas has remained virtually constant, averaging roughly 95 percent of total annual flow throughout the 1955‐70 study period. Double‐mass curve analysis of base flow as a percentage of total annual stream flow indicates that (1) changes in stream flow characteristics began in the early 1960's in the sewered area and in the late 1960's in the later urbanized, unsewered area, and (2) a new equilibrium has been established between the streams in the sewered area and the new hydrologic characteristics of their urbanized drainage basins.

show abstract

“…In Nassau County, concentrations of nitrate in groundwater increased from less than detectible levels in 1910 to about 10 mg/L as N in 1975 because of increased wastewater disposal through cesspools and septic tanks in dense residential developments. (63,64) Groundwater is the sole source of freshwater on Long Island. Increases in pumping drew nitrate-enriched water down to depths as great as 500 ft or more in this area, causing concern over the quality of this important source of drinking water.…”

Section: Depth Of Monitoring Wellsmentioning

confidence: 99%

The quality of our Nation's waters: water quality in the Northern Atlantic Coastal Plain surficial aquifer system, Delaware, Maryland, New Jersey, New York, North Carolina, and Virginia, 1988-2009

Denver¹,

Ator²,

Fischer³

et al. 2015

Circular

View full text Add to dashboard Cite

For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888-ASK-USGS. For an overview of USGS information products, including maps, imagery, and publications, visit http: //www.usgs.gov/pubprod To order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Denver, J.M., Ator, S.W., Fischer, J.M., Harned, D.C., Schubert, Christopher, and Szabo, Zoltan, 2014, The quality of our Nation's waters-Water quality in the Northern Atlantic Coastal Plain surficial aquifer system, Delaware, Maryland, New Jersey, New York, North Carolina, and Virginia, 1988-2009: U.S. Geological Survey Circular 1353. Library of Congress Cataloging-in-Publication DataDenver, J. M.The quality of our Nation's waters---water quality in the Northern Atlantic coastal plain surficial aquifer system, Delaware, Maryland, New Jersey, New York, North Carolina, and Virginia, 1988-2009 "USGS, through the NAWQA Program, has extensively studied the movement of nutrients through groundwater. We look forward to using this information as we work with state and local partners to implement practices on the land that have the greatest benefit to the quality of our local and Bay waters."Nick DiPasquale EPA Director of the Chesapeake Bay Program iv ForewordThe United States has made major investments in assessing, managing, regulating, and conserving natural resources, such as water and a variety of ecosystems. Sustaining the quality of the Nation's water resources and the health of our diverse ecosystems depends on the availability of sound water-resources data and information to develop effective, science-based policies. Effective management of water resources also brings more certainty and efficiency to important economic sectors. Taken together, these actions lead to immediate and long-term economic, social, and environmental benefits that make a difference to the lives of millions of people (http://water.usgs.gov/nawqa/applications/ ).Two decades ago, Congress established the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program to meet this need. Since then NAWQA has served as a primary source of nationally consistent information on the quality of the Nation's streams and groundwater, on ways in which water quality changes over time, and on the natural features and human activities affecting the quality of streams and groundwater. Objective and reliable data, systematic scientific studies, and models are used to characterize where, when, and why the Nation's water quality is degraded-and what can be done to improve and...

show abstract

Trends of Selected Ground‐Water Constituents from Infiltration Galleries, Southeast Nassau County, New York^a

Cited by 9 publications

References 3 publications

Impacts of Land Cover on Stream Hydrology in the West Georgia Piedmont, USA

Impacts of Land Cover on Stream Hydrology in the West Georgia Piedmont, USA

EFFECTS OF URBANIZATION ON BASE FLOW OF SELECTED SOUTH‐SHORE STREAMS, LONG ISLAND, NEW YORK¹

The quality of our Nation's waters: water quality in the Northern Atlantic Coastal Plain surficial aquifer system, Delaware, Maryland, New Jersey, New York, North Carolina, and Virginia, 1988-2009

Contact Info

Product

Resources

About

Trends of Selected Ground‐Water Constituents from Infiltration Galleries, Southeast Nassau County, New Yorka

Cited by 9 publications

References 3 publications

Impacts of Land Cover on Stream Hydrology in the West Georgia Piedmont, USA

Impacts of Land Cover on Stream Hydrology in the West Georgia Piedmont, USA

EFFECTS OF URBANIZATION ON BASE FLOW OF SELECTED SOUTH‐SHORE STREAMS, LONG ISLAND, NEW YORK1

The quality of our Nation's waters: water quality in the Northern Atlantic Coastal Plain surficial aquifer system, Delaware, Maryland, New Jersey, New York, North Carolina, and Virginia, 1988-2009

Contact Info

Product

Resources

About

Trends of Selected Ground‐Water Constituents from Infiltration Galleries, Southeast Nassau County, New York^a

EFFECTS OF URBANIZATION ON BASE FLOW OF SELECTED SOUTH‐SHORE STREAMS, LONG ISLAND, NEW YORK¹