Judson W Harvey (Former Employee)
Science and Products
Improved hydrologic forecasting through synthesis of critical storage components and timescales across watersheds worldwide
Models that predict the flow of rivers and streams are critically important for planning flood control, hydropower, and reservoir operations, as well as for management of fish and wildlife populations. As temperatures and precipitation regimes change globally, the need to improve and develop these models for a wider spatial coverage and higher spatial fidelity becomes more imperative...
River Corridor hot spots for biogeochemical processing: a continental scale synthesis
Rivers are the veins of the landscape, providing environmental benefits that are disproportionately high relative to their aerial extent; shedding flood waters, hosting aquatic ecosystems, transporting solutes and energy-rich materials, and storing and transforming pollutants into less harmful forms. From uplands to the coasts, rivers facilitate key biogeochemical reactions that...
Continental-scale overview of stream primary productivity, its links to water quality, and consequences for aquatic carbon biogeochemistry
Streams and rivers have a limited spatial extent, but are increasingly recognized as key components of regional biogeochemical cycles. The collective metabolic processing of organisms, known as ecosystem metabolism, is centrally important to nutrient cycling and carbon fluxes in these environments, but is poorly integrated into emerging biogeochemical concepts. This line of inquiry lags...
Filter Total Items: 16
Modeled transport components of daily chlorophyll-a in the Illinois River, 2018 through 2020 (version 1.1, April 2024) Modeled transport components of daily chlorophyll-a in the Illinois River, 2018 through 2020 (version 1.1, April 2024)
TThis data release contains approximately three years of modeled chlorophyll-a—a proxy for planktonic algal biomass—transport through a 394-km portion of the Illinois River. Defined by four distinct reaches, model estimates include daily water balance, velocities, and algal biomass separated into its components of net growth, net loss, transported from upstream, and input from...
Daily Estimates of Chlorophyll Concentration for 82 U.S. Rivers Daily Estimates of Chlorophyll Concentration for 82 U.S. Rivers
This data release contains modeled daily chlorophyll concentration for 82 streams and rivers across the conterminous United States. Estimates of daily chlorophyll concentration were generated using an extreme gradient boosting (XGBoost) (Chen & Guestrin, 2016) machine learning model and various measures of water quality, reach characteristics, and meteorology. Child Items in this data...
Hydrologic analysis of flow and transport for the Everglades DPM experiments Hydrologic analysis of flow and transport for the Everglades DPM experiments
Flow and transport of sediment and phosphorus through the low-gradient wetlands of the Everglades, FL were characterized using hydrologic, biological, geomorphic, and biogeochemical data as inputs to several types of simulations. The data were collected in the DPM (Decompartmentalization Physical Model) experimental high-flow facility in the central Everglades, FL. The DPM includes...
Light model and GPP estimates for 173 U.S. rivers Light model and GPP estimates for 173 U.S. rivers
This data release contains products from Savoy & Harvey (2021) which modeled photosynthetically active radiation and gross primary productivity (GPP) for 173 streams and rivers across the continental United States. Estimates of photosynthetically active radiation (PAR) were generated using a model that considers the contribution of light attenuation from riparian zones as well as within...
RiverMET: Workflow and scripts for river metabolism estimation including Illinois River Basin application, 2005 - 2020 RiverMET: Workflow and scripts for river metabolism estimation including Illinois River Basin application, 2005 - 2020
Ecosystem metabolism is a measure of energy flow in terrestrial and aquatic environments that quantifies a balance between the rate of biomass production by photosynthesizing plants and the rate of biomass oxidation by respiring plants and animals to maintain and build living biomass. It is therefore a fundamental measure of ecosystem function that quantifies the balance between the rate...
High-Flow Field Experiments to Inform Everglades Restoration: Experimental Data 2010 to 2022 (ver. 2.0, October 2023) High-Flow Field Experiments to Inform Everglades Restoration: Experimental Data 2010 to 2022 (ver. 2.0, October 2023)
Data were collected between 2010 and 2022 in a research area of the Everglades known as the Decompartmentalization Physical Model (DPM), a wetland area in the central Everglades that includes canals and levees bordering Water Conservation Area 3A (WCA-3A) to the northwest and Water Conservation Area 3B (WCA-3B) to the southeast. During the twelve-year study period more than ten major...
Filter Total Items: 121
Biophysical simulation of wetland surface water flow to predict changing water availability in the Everglades Biophysical simulation of wetland surface water flow to predict changing water availability in the Everglades
A central challenge for water managers is to adaptively manage water availability to meet societal needs while simultaneously protecting ecosystems. Progress restoring the Everglades requires predictions of how overland flow of surface water can be increased to rehydrate and revive downstream areas without causing unintended harms. We developed a biophysical flow rate expression (BioFRE)...
Authors
Judson Harvey, Jay Choi, Walter Wilcox, Michael C. Brown, Wasantha Lal
High-Flow Experimental Outcomes to Inform Everglades Restoration, 2010–22 High-Flow Experimental Outcomes to Inform Everglades Restoration, 2010–22
The Decompartmentalization Physical Model (DPM) was an experimental facility in the central Everglades operated between 2010 and 2022 to release high flows through a levee-enclosed area of degraded ridge and slough wetland that had been isolated from flow for sixty years. The purpose of DPM experimental program was to make measurements before, during, and after seasonal high-flow...
Authors
Judson W. Harvey, Jay Choi, Laurel Larsen, Katherine Skalak, Morgan Maglio, Katherine Quion, Tzu-Yao Lin, Allison Swartz, Jesus Gomez-Velez, Noah Schmadel
Chlorophyll a in lakes and streams of the United States (2005–2022) Chlorophyll a in lakes and streams of the United States (2005–2022)
The concentration of chlorophyll a in phytoplankton and periphyton represents the amount of algal biomass. We compiled an 18-year record (2005–2022) of pigment data from water bodies across the United States (US) to support efforts to develop process-based, machine learning, and remote sensing models for prediction of harmful algal blooms (HABs). To our knowledge, this dataset of nearly...
Authors
Sarah Spaulding, Lindsay R.C. Platt, Jennifer C. Murphy, S. Alex Covert, Judson Harvey
Evaluation of metrics and thresholds for use in national-scale river harmful algal bloom assessments Evaluation of metrics and thresholds for use in national-scale river harmful algal bloom assessments
The spatiotemporal distribution of harmful algal blooms (HABs) in rivers remains poorly understood, and there is an urgent need to develop a consistent set of metrics to better document HAB occurrences and forecast future events. Using data from seven sites in the Illinois River Basin, we computed metrics focused on HAB conditions related to excess algal growth and hypoxia. Daily mean...
Authors
Sarah M. Stackpoole, Jacob Aaron Zwart, Jennifer L. Graham, Judson Harvey, Noah Schmadel, Jennifer C. Murphy
Knowledge gaps and opportunities in water-quality drivers of aquatic ecosystem health Knowledge gaps and opportunities in water-quality drivers of aquatic ecosystem health
This report identifies key scientific gaps that limit our ability to predict water quality effects on health of aquatic ecosystems and proposes approaches to address those gaps. Topics considered include (1) coupled nutrient-carbon cycle processes and related ecological-flow-regime drivers of ecosystem health, (2) anthropogenic and geogenic toxin bioexposure, (3) fine sediment drivers of...
River control points for algal productivity revealed by transport analysis River control points for algal productivity revealed by transport analysis
Measurement of planktonic chlorophyll-a—a proxy for algal biomass—in rivers may represent local production or algae transported from upstream, confounding understanding of algal bloom development in flowing waters. We modeled 3 years of chlorophyll-a transport through a 394-km portion of the Illinois River and found that although algal biomass is longitudinally widespread, most net...
Authors
Noah Schmadel, Judson Harvey, Jay Choi, Sarah M. Stackpoole, Jennifer L. Graham, Jennifer C. Murphy
Science and Products
Improved hydrologic forecasting through synthesis of critical storage components and timescales across watersheds worldwide
Models that predict the flow of rivers and streams are critically important for planning flood control, hydropower, and reservoir operations, as well as for management of fish and wildlife populations. As temperatures and precipitation regimes change globally, the need to improve and develop these models for a wider spatial coverage and higher spatial fidelity becomes more imperative...
River Corridor hot spots for biogeochemical processing: a continental scale synthesis
Rivers are the veins of the landscape, providing environmental benefits that are disproportionately high relative to their aerial extent; shedding flood waters, hosting aquatic ecosystems, transporting solutes and energy-rich materials, and storing and transforming pollutants into less harmful forms. From uplands to the coasts, rivers facilitate key biogeochemical reactions that...
Continental-scale overview of stream primary productivity, its links to water quality, and consequences for aquatic carbon biogeochemistry
Streams and rivers have a limited spatial extent, but are increasingly recognized as key components of regional biogeochemical cycles. The collective metabolic processing of organisms, known as ecosystem metabolism, is centrally important to nutrient cycling and carbon fluxes in these environments, but is poorly integrated into emerging biogeochemical concepts. This line of inquiry lags...
Filter Total Items: 16
Modeled transport components of daily chlorophyll-a in the Illinois River, 2018 through 2020 (version 1.1, April 2024) Modeled transport components of daily chlorophyll-a in the Illinois River, 2018 through 2020 (version 1.1, April 2024)
TThis data release contains approximately three years of modeled chlorophyll-a—a proxy for planktonic algal biomass—transport through a 394-km portion of the Illinois River. Defined by four distinct reaches, model estimates include daily water balance, velocities, and algal biomass separated into its components of net growth, net loss, transported from upstream, and input from...
Daily Estimates of Chlorophyll Concentration for 82 U.S. Rivers Daily Estimates of Chlorophyll Concentration for 82 U.S. Rivers
This data release contains modeled daily chlorophyll concentration for 82 streams and rivers across the conterminous United States. Estimates of daily chlorophyll concentration were generated using an extreme gradient boosting (XGBoost) (Chen & Guestrin, 2016) machine learning model and various measures of water quality, reach characteristics, and meteorology. Child Items in this data...
Hydrologic analysis of flow and transport for the Everglades DPM experiments Hydrologic analysis of flow and transport for the Everglades DPM experiments
Flow and transport of sediment and phosphorus through the low-gradient wetlands of the Everglades, FL were characterized using hydrologic, biological, geomorphic, and biogeochemical data as inputs to several types of simulations. The data were collected in the DPM (Decompartmentalization Physical Model) experimental high-flow facility in the central Everglades, FL. The DPM includes...
Light model and GPP estimates for 173 U.S. rivers Light model and GPP estimates for 173 U.S. rivers
This data release contains products from Savoy & Harvey (2021) which modeled photosynthetically active radiation and gross primary productivity (GPP) for 173 streams and rivers across the continental United States. Estimates of photosynthetically active radiation (PAR) were generated using a model that considers the contribution of light attenuation from riparian zones as well as within...
RiverMET: Workflow and scripts for river metabolism estimation including Illinois River Basin application, 2005 - 2020 RiverMET: Workflow and scripts for river metabolism estimation including Illinois River Basin application, 2005 - 2020
Ecosystem metabolism is a measure of energy flow in terrestrial and aquatic environments that quantifies a balance between the rate of biomass production by photosynthesizing plants and the rate of biomass oxidation by respiring plants and animals to maintain and build living biomass. It is therefore a fundamental measure of ecosystem function that quantifies the balance between the rate...
High-Flow Field Experiments to Inform Everglades Restoration: Experimental Data 2010 to 2022 (ver. 2.0, October 2023) High-Flow Field Experiments to Inform Everglades Restoration: Experimental Data 2010 to 2022 (ver. 2.0, October 2023)
Data were collected between 2010 and 2022 in a research area of the Everglades known as the Decompartmentalization Physical Model (DPM), a wetland area in the central Everglades that includes canals and levees bordering Water Conservation Area 3A (WCA-3A) to the northwest and Water Conservation Area 3B (WCA-3B) to the southeast. During the twelve-year study period more than ten major...
Filter Total Items: 121
Biophysical simulation of wetland surface water flow to predict changing water availability in the Everglades Biophysical simulation of wetland surface water flow to predict changing water availability in the Everglades
A central challenge for water managers is to adaptively manage water availability to meet societal needs while simultaneously protecting ecosystems. Progress restoring the Everglades requires predictions of how overland flow of surface water can be increased to rehydrate and revive downstream areas without causing unintended harms. We developed a biophysical flow rate expression (BioFRE)...
Authors
Judson Harvey, Jay Choi, Walter Wilcox, Michael C. Brown, Wasantha Lal
High-Flow Experimental Outcomes to Inform Everglades Restoration, 2010–22 High-Flow Experimental Outcomes to Inform Everglades Restoration, 2010–22
The Decompartmentalization Physical Model (DPM) was an experimental facility in the central Everglades operated between 2010 and 2022 to release high flows through a levee-enclosed area of degraded ridge and slough wetland that had been isolated from flow for sixty years. The purpose of DPM experimental program was to make measurements before, during, and after seasonal high-flow...
Authors
Judson W. Harvey, Jay Choi, Laurel Larsen, Katherine Skalak, Morgan Maglio, Katherine Quion, Tzu-Yao Lin, Allison Swartz, Jesus Gomez-Velez, Noah Schmadel
Chlorophyll a in lakes and streams of the United States (2005–2022) Chlorophyll a in lakes and streams of the United States (2005–2022)
The concentration of chlorophyll a in phytoplankton and periphyton represents the amount of algal biomass. We compiled an 18-year record (2005–2022) of pigment data from water bodies across the United States (US) to support efforts to develop process-based, machine learning, and remote sensing models for prediction of harmful algal blooms (HABs). To our knowledge, this dataset of nearly...
Authors
Sarah Spaulding, Lindsay R.C. Platt, Jennifer C. Murphy, S. Alex Covert, Judson Harvey
Evaluation of metrics and thresholds for use in national-scale river harmful algal bloom assessments Evaluation of metrics and thresholds for use in national-scale river harmful algal bloom assessments
The spatiotemporal distribution of harmful algal blooms (HABs) in rivers remains poorly understood, and there is an urgent need to develop a consistent set of metrics to better document HAB occurrences and forecast future events. Using data from seven sites in the Illinois River Basin, we computed metrics focused on HAB conditions related to excess algal growth and hypoxia. Daily mean...
Authors
Sarah M. Stackpoole, Jacob Aaron Zwart, Jennifer L. Graham, Judson Harvey, Noah Schmadel, Jennifer C. Murphy
Knowledge gaps and opportunities in water-quality drivers of aquatic ecosystem health Knowledge gaps and opportunities in water-quality drivers of aquatic ecosystem health
This report identifies key scientific gaps that limit our ability to predict water quality effects on health of aquatic ecosystems and proposes approaches to address those gaps. Topics considered include (1) coupled nutrient-carbon cycle processes and related ecological-flow-regime drivers of ecosystem health, (2) anthropogenic and geogenic toxin bioexposure, (3) fine sediment drivers of...
River control points for algal productivity revealed by transport analysis River control points for algal productivity revealed by transport analysis
Measurement of planktonic chlorophyll-a—a proxy for algal biomass—in rivers may represent local production or algae transported from upstream, confounding understanding of algal bloom development in flowing waters. We modeled 3 years of chlorophyll-a transport through a 394-km portion of the Illinois River and found that although algal biomass is longitudinally widespread, most net...
Authors
Noah Schmadel, Judson Harvey, Jay Choi, Sarah M. Stackpoole, Jennifer L. Graham, Jennifer C. Murphy