Matthew D Petkewich

Coastal Salinity Index for Monitoring Drought

To address the data and information gap for characterizing coastal drought, a coastal salinity index (CSI) was developed using salinity data (Conrads 2016; Conrads and Darby, 2017). The CSI uses an approach similar to the Standardized Precipitation Index (SPI), a readily available drought index that is widely used for monitoring meteorological droughts (McKee and others, 1993). The CSI substitutes total monthly precipitation with monthly mean salinity data to determine the probability of recording a given salinity value in a particular month. The initial investigation demonstrated that the index could be used to delineate short- and long-term drought (saline) and wet (high freshwater inflow) conditions; however,...

Categories: Data; Tags: Everglades National Park, USGS Science Data Catalog (SDC), brackish, ecology, estuary, All tags... field monitoring stations, mesohaline, oligohaline, salinity, water quality, Fewer tags

Autonomous Underwater Vehicle Water-Quality and Sonar Measurements alongside Conductivity, Temperature and Depth Measurements in the Delaware River near Philadelphia, Pennsylvania, 2021

These datasets were created in support of the U.S. Geological Survey's (USGS) Next Generation Water Observing System (NGWOS) for the Delaware River Basin pilot study (Eberts, Wagner, and Woodside, 2019). The NGWOS utilizes real-time data, improved computational capabilities, and new technologies such as unmanned aerial vehicles (UAV) and autonomous underwater vehicles (AUV) to provide information on water quality and/or quantity, in more locations, quickly and efficiently (Eberts, Wagner, and Woodside, 2019). Combined with advanced modeling applications, the NGWOS will be an important tool for water-resource managers and emergency management. In this study, water-quality and bathymetric data were measured with an...

Categories: Data; Tags: Delaware, Delaware County, Delaware River, Hydrology, New Castle County, All tags... Philadelphia, Philadelphia County, USGS Science Data Catalog (SDC), environment, ngwos, oxygen content (water), river systems, salinity, water chemistry, water quality, Fewer tags

Autonomous Underwater Vehicle Water-Quality and Sonar Measurements in Delaware River near Philadelphia, Pennsylvania, 2019

These data sets were created in support of the U.S. Geological Survey's (USGS) Next Generation Water Observing System (NGWOS) for the Delaware River Basin pilot study (Eberts, Wagner, and Woodside, 2019). The NGWOS utilizes real-time data, improved computational capabilities, and new technologies such as the rapid deployment of unmanned aerial vehicle's (UAV) and autonomous underwater vehicle's (AUV) to provide information on water quantity and quality, in more locations, quickly and efficiently (Eberts, Wagner, and Woodside, 2019). Combined with advanced modeling applications, the NGWOS will be an important tool for water-resource managers and emergency management. Water-quality and bathymetric data were measured...

Categories: Data; Tags: Delaware, Delaware River, Philadelphia, Philadelphia County, USGS Science Data Catalog (SDC), All tags... Wilmington, algal blooms, environment, inlandWaters, lakes, none, oxygen content (water), rivers, water chemistry, water quality, Fewer tags

Compilation of Data on the Middle Savannah River for the Analysis of Sub-Daily Flow Variation, 2011-2015

The Nature Conservancy (TNC) has been working with the U.S. Fish and Wildlife Service (USFWS), the U.S Army Corps of Engineers – Savannah District (USACE - Savannah) and other stakeholders on environmental flow recommendations for the Savannah River since May 2002 and have recently (2015) updated the environmental flow recommendations from 2003. Analysis of the flow data revealed a large amount of flow variability on sub-daily basis in the reach of the Savannah River from the Augusta Shoal downstream to the New Savannah Lock and Dam. The sub-daily flow variability affects sustaining suitable habitat during critical periods to promote fish spawning of robust redhorse, shad, and Atlantic sturgeon. The cause of the...

Categories: Data; Tags: Savannah River, South Carolina, Georgia, Strom Thurmond Reservoir, Stevens Creek, USGS Science Data Catalog (SDC), sub-daily flow variability, Strom Thurmond Lake, Savannah River, hydropower

Water-quality data for the Bushy Park Reservoir near Goose Creek, South Carolina, from September 2013 to May 2015. Data includes the chemical, physical, and biological properties that influence (1) geosmin and 2-methyisobornel (MIB) occurrence in this source-water reservoir, (2) cyanobacterial biovolumes, and (3) geosmin-producing and toxin-producing genera of cyanobacteria. This data release supports the following publication: Conrads, P.A., Journey, C.A., Petkewich, M.D., Lanier, T.H., and Clark, J.M., 2018, Characterization of water quality in Bushy Park Reservoir, South Carolina, 2013–15: U.S. Geological Survey Scientific Investigations Report 2018–5010, 175 p., https://doi.org/10.3133/sir20185010.

Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: USGS Science Data Catalog (SDC)