Water Resources

Filter Total Items: 349
Date published: September 17, 2018
Status: Active

Water-Quality Trends

Is water quality getting better or worse?  Answering this deceptively simple question has been a fundamental objective of the USGS National Water-Quality Assessment Project’s research. Learn about trends in contaminants in the nation’s streams and rivers, trends in contaminants that collect in the bed sediment of streams and lakes, and changes in the quality of the nation’s groundwater.

Contacts: Barbara Mahler
Date published: September 17, 2018
Status: Active

Drinking Water Taste and Odor

Some water is just unpleasant to drink—it’s cloudy, or it smells or tastes bad. Some drinking water discolors teeth or skin, stains laundry or plumbing fixtures, or corrodes or clogs pipes. These effects are caused when some naturally occurring constituents occur at concentrations high enough to be a nuisance, and are particularly common where groundwater is used as a drinking water supply....

Date published: September 17, 2018
Status: Active

Sediment-Associated Contaminants

Stream, river, and lake bed sediment are reservoirs for many contaminants.  These contaminants include some “legacy” contaminants, like DDT, PCBs, and chlordane, and chemicals currently in use, like the insecticide bifenthrin and many flame retardants.  Learn about techniques used to study sediment-associated contaminants and their importance to aquatic biota.

Contacts: Barbara Mahler
Date published: September 17, 2018
Status: Active

Stream Ecology

Who lives in your stream? Rivers and streams, even small ones, are teeming with a vast number of species, including fish, aquatic invertebrates, and algae. Stream ecology is the study of those aquatic species, the way they interrelate, and their interactions with all aspects of these flowing water systems.

Date published: September 17, 2018
Status: Active

NWQP Research on Harmful Algal Blooms (HABs)

Harmful algal blooms (HABs) are caused by a complex set of physical, chemical, biological, hydrological, and meteorological conditions. Many unanswered questions remain about occurrence, environmental triggers for toxicity, and the ability to predict the timing, duration, and toxicity of HABs.

Date published: August 19, 2018
Status: Active

USGS / National Park Service Water-Quality Partnership

Since 1998, the USGS-National Park Service Water-Quality Partnership has supported 217 projects to protect and improve water quality in 119 national parks. These USGS-NPS collaborative projects support science-based resource management by the National Park Service to address critical water-quality issues for many of our Nation's most highly valued aquatic systems. 

Date published: August 3, 2018
Status: Active

Changes in Water-Use Categories

Water-use terminology in the series of USGS water-use circulars, first published for the year 1950, has changed over time as illustrated here. Some categories were re-named but retained essentially the same definition, while other changes split existing categories or shifted components of one category to another. See the entries for these terms in the...

Date published: July 23, 2018
Status: Active

Flood Inundation Mapping Science

When planning for a flood, there are three key questions that must be answered: What areas will be flooded? How deep will the flood waters get? When will the flood arrive? Historical flooding can help a community anticipate how much impact similar flood events could have, but there are other methods and tools that can provide more accurate and nuanced estimations of a wide variety of...

Attribution: Water Resources
Date published: July 20, 2018
Status: Active

SWToolbox Software Information

USGS and EPA have combined their SWSTAT and DFLOW software programs into a new tool for the low flow anlaysis, the SWToolbox.

Contacts: SWToolbox Help
Attribution: Water Resources
Date published: July 16, 2018
Status: Active

Flood Inundation Mapping (FIM) Program

Floods are the leading cause of natural-disaster losses in the U.S. More than 75 percent of declared Federal disasters are related to floods, and annual flood losses average almost $8 billion with over 90 fatalities per year. Although the amount of fatalities has declined due to improved early warning systems, economic losses continue to rise with increased urbanization in flood-hazard areas...

Attribution: Water Resources
Date published: July 9, 2018
Status: Active

International Water Resources Activities

Water projects of international interest.

Contacts: Verne Schneider
Date published: June 26, 2018
Status: Active

FIM Toolbox: Prepare Your FIM Science

The FIM Toolbox contains comprehensive information on the Flood Inundation Mapping program, including how to develop a flood inundation map library. This section of the FIM Toolbox provides information on how to prepare your FIM science. The Toolbox is updated as new resources become available.

Attribution: Water Resources