Images

USGS Hydrologic Technicians installing new orifice piping at USGS gage 12143900 Boxley Creek near Edgewick, WA pool. 

Marker bed known as the Loriolia Bed, found 80 feet below the contact of the Glen Rose Limestone and the Kainer Formation. The photograph was taken north of Farm to Market Road (FM) 195, approximately 1,500 feet west of the intersection of FM 220 and FM 195. The Loriolia texana fossils are identified by white arrows (photograph by Allan K. Clark, U.S.

A Conductivity/Temperature/Depth (CTD) instrument package on a boom above the San Francisco Bay, taken aboard the R/V Peterson.

A white heron flying across a marsh in York County, Virginia.

A flying insect perched on lakeshore grasses, Albemarle County, Virginia.

NWQL

Sediment acoustics - hydrologists

This photo was taken during a routine site visit to measure streamflow on the Rio Chama in New Mexico. 

Many eyes watch the amount of water running past the important Otowi streamflow gage. On May 23rd, Tyson Hatch from the New Mexico Water Science Center (NMWSC) presented an overview of the streamgaging activities of the Otowi Gage to participants of the Rio Chama Basin and San Juan-Chama Project Tour.

Stephanie Kula is collecting water-quality sample by wading in the Maumee River near Defiance, Ohio, for the Western Lake Erie Basin project. Nutrients (nitrogen and phosphorus) and sediment from urban and agricultural practices are a concern in the Western Lake Erie Basin watersheds in northwester

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, an ecologist uses a net to collect a sample of aquatic invertebrates for ennumeration and identification.

Graffiti adorns an outfall pipe discharging stormwater into Sausal Creek. Sausal Creek was one of the many urban creeks sampled by the Regional Stream Quality Assessment (RSQA).

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, two hydrologic technicians record characteristics of stream habitat.

Biofilms take up pesticides in streams. Here, a hydrologic technician collects a sample of biofilm that has colonized an unglazed ceramic tile over 60-90 days. Learn more about biofilms as integrative samplers of pesticides here.

Biofilms take up pesticides in streams. Here, a hydrologic technician hold ups an unglazed ceramic tile that has been colonized by biofilm over 60-90 days. Learn more about biofilms as integrative samplers of pesticides here.

Biofilms take up pesticides in streams. Here, a hydrologic technician collects a sample of biofilm that has colonized an unglazed ceramic tile over 60-90 days. Learn more about biofilms as integrative samplers of pesticides here.

A hydrotech prepares to collect a water-quality sample at urban Sausal Creek, with its distinctive graffiti. Water-quality and ecological surveys were done at the creek as part of the USGS Regional Stream Quality Assessment (RSQA) in the summer of 2016.

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, a hydrologist carefully folds a filter used to collect a sample for analysis of eDNA.

Sausal Creek in central Oakland, California, is an urban creek that has been extensively modified for flood control. The USGS Regional Stream Quality Assessment assessed the water quality and ecological integrity of small streams like Sausal Creek in five major regions of the country.

Flowers and graffiti turn urban Sausal Creek into a bizarre wonderland. Water-quality and ecological surveys were done at the creek as part of the USGS Regional Stream Quality Assessment (RSQA) in the summer of 2016.

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, a hydrologic technician records characteristics of the habitat of a highly urbanized stream.