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November 18, 2022

Mapping areas of groundwater susceptible to transient contamination events from rapid infiltration into shallow fractured-rock aquifers in agricultural regions of the conterminous United States Mapping areas of groundwater susceptible to transient contamination events from rapid infiltration into shallow fractured-rock aquifers in agricultural regions of the conterminous United States

Current time-invariant groundwater vulnerability assessments may not capture intermittent contamination events in landscape areas that experience rapid infiltration following precipitation or snowmelt. Occurrences of rapid infiltration and intermittent degradation of groundwater quality are frequently reported in fractured-rock aquifers. This investigation identifies landscape areas...

Authors

Allen M. Shapiro, James A. Falcone

Water Resources Mission Area

November 18, 2022

Carbon and carbon storage in the national wilderness preservation system of the conterminous United States Carbon and carbon storage in the national wilderness preservation system of the conterminous United States

No abstract available.

Authors

Daniel W McCollum, Michael H Hand, Pamela M Froemke, Christopher Huber

Ecosystems Mission Area, Fort Collins Science Center

November 17, 2022

Evaluation of fish behavior at the entrances to a Selective Water Withdrawal structure in Lake Billy Chinook, Oregon, 2021 Evaluation of fish behavior at the entrances to a Selective Water Withdrawal structure in Lake Billy Chinook, Oregon, 2021

Imaging sonar was used to assess the behavior, abundance, and timing of fish at the entrances to the Selective Water Withdrawal (SWW) intake structure located in the forebay of Round Butte Dam, Oregon during the spring of 2021. The purposes of the SWW are (1) to direct surface currents in the forebay to attract and collect downriver migrating juvenile salmonid smolts (Chinook salmon...

Authors

Collin D. Smith, Tyson W. Hatton

Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

November 17, 2022

An economic perspective on the relationship between wilderness and water resources An economic perspective on the relationship between wilderness and water resources

No abstract available.

Authors

James R. Meldrum, Christopher Huber

Ecosystems Mission Area, Fort Collins Science Center

November 16, 2022

Distribution and demography of Southwestern Willow Flycatchers in San Diego County, 2015–19 Distribution and demography of Southwestern Willow Flycatchers in San Diego County, 2015–19

We surveyed for Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) at 33 locations along multiple drainages in San Diego County, including portions of Agua Hedionda Creek, Cottonwood Creek, Escondido Creek, Los Penasquitos Creek, Otay River, San Diego River, San Dieguito River, San Luis Rey River, Sweetwater River, and Tijuana River. Resident flycatchers were only...

Authors

Scarlett L. Howell, Barbara E. Kus, Shannon M. Mendia

Ecosystems Mission Area, Western Ecological Research Center (WERC)

November 15, 2022

Evaluate propagation efforts and determine dispersal patterns for Quadrula fragosa from tagged, artificially infested host fish (Ictalurus punctatus) in the St. Croix National Scenic Riverway (SACN) Evaluate propagation efforts and determine dispersal patterns for Quadrula fragosa from tagged, artificially infested host fish (Ictalurus punctatus) in the St. Croix National Scenic Riverway (SACN)

The St. Croix National Scenic Riverway (SACN) has been the site of propagation and restoration efforts for two federally endangered unionid mussels: Higgins’ Eye, Lampsilis higginsii and Winged Mapleleaf (WML), Quadrula fragosa. Since about 2000, government agencies have collaboratively developed techniques to successfully propagate Higgins’ Eye and reintroduce the captive-reared...

Authors

Michelle Bartsch

Ecosystems Mission Area, Upper Midwest Environmental Sciences Center