Charles W. Downer
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View article: User guidelines on catchment post-wildfire hydrological modeling
User guidelines on catchment post-wildfire hydrological modeling Open
Wildfires significantly alter watershed hydrology by increasing runoff due to reduced infiltration from soil-water repellency. To predict long-term wildfire impacts, a coupled framework was developed to simulate postfire changes in soil hy…
View article: Modernizing the Gridded Surface Subsurface Hydrologic Analysis Model
Modernizing the Gridded Surface Subsurface Hydrologic Analysis Model Open
View article: Part 1 - Eco-Hydrology Engineering Design Tool - GSSHA Capabilities - Flow, Sediment, and Water Temperature
Part 1 - Eco-Hydrology Engineering Design Tool - GSSHA Capabilities - Flow, Sediment, and Water Temperature Open
<p>The U.S. Army Corps of Engineers (USACE) has a major responsibility for the regulation of the Nation’s streams, rivers, and waterways. This often requires developing water quality models to resolve issues and concerns wi…
View article: Reaping Rewards from River and Rain: Applications of California’s Russian River Hydrometeorological Observing Network (RHONET)
Reaping Rewards from River and Rain: Applications of California’s Russian River Hydrometeorological Observing Network (RHONET) Open
The Russian River Hydrometeorological Observing Network (RHONET) is a unique suite of high-resolution in situ and remote sensing observations deployed over 20 years to address both scientific and operational gaps in understanding, monitori…
View article: The Hydrometeorological Observation Network in California’s Russian River Watershed: Development, Characteristics, and Key Findings from 1997 to 2019
The Hydrometeorological Observation Network in California’s Russian River Watershed: Development, Characteristics, and Key Findings from 1997 to 2019 Open
The Russian River Hydrometeorological Observing Network (RHONET) is a unique suite of high-resolution in situ and remote sensing observations deployed over 20 years to address both scientific and operational gaps in understanding, monitori…
View article: Nested physics-based watershed modeling at Seven Mile Creek : Minnesota River Integrated Watershed Study
Nested physics-based watershed modeling at Seven Mile Creek : Minnesota River Integrated Watershed Study Open
The Minnesota River Basin (MRB) Integrated Study Team (IST) was tasked with assessing the condition of the MRB and recommending management options to reduce suspended sediments and improve the water quality in the basin.The Gridded Surface…
View article: Additional RHONET Dataset
Additional RHONET Dataset Open
View article: Integrated Hydro-Terrestrial Modeling: Development of a National Capability
Integrated Hydro-Terrestrial Modeling: Development of a National Capability Open
Water is one of our most important natural resources and is essential to our national economy and security. Multiple federal government agencies have mission elements that address national needs related to water. Each water-related agency …
View article: Simulation of coastal storm surge and rainfall flooding scenarios at Camp Lejeune with GSSHA
Simulation of coastal storm surge and rainfall flooding scenarios at Camp Lejeune with GSSHA Open
This Coastal and Hydraulics Engineering Technical Note (CHETN) describes the development of a computer model to examine flooding scenarios with pre-defined storm surge and extreme rainfall due to tropical systems, using the Gridded Surface…
View article: Process Modeling of Soil Thermal and Hydrological Dynamics
Process Modeling of Soil Thermal and Hydrological Dynamics Open
To explicitly simulate the soil thermal state effects on hydrological response, the soil thermal regime, frozen soil, and permafrost simulation capability in the Geophysical Institute Permafrost Laboratory (GIPL) model have been included i…
View article: Catchment Hydrological Modeling with Soil Thermal Dynamics during Seasonal Freeze-Thaw Cycles
Catchment Hydrological Modeling with Soil Thermal Dynamics during Seasonal Freeze-Thaw Cycles Open
To account for the seasonal changes in the soil thermal and hydrological dynamics, the soil moisture state physical process defined by the Richards Equation is integrated with the soil thermal state defined by the numerical model of phase …
View article: A simple temperature-based method to estimate heterogeneous frozen ground within a distributed watershed model
A simple temperature-based method to estimate heterogeneous frozen ground within a distributed watershed model Open
Frozen ground can be important to flood production and is often heterogeneous within a watershed due to spatial variations in the available energy, insulation by snowpack and ground cover, and the thermal and moisture properties of the soi…
View article: A Simple Temperature-Based Method to Estimate HeterogeneousFrozen Ground within a Distributed Watershed Model
A Simple Temperature-Based Method to Estimate HeterogeneousFrozen Ground within a Distributed Watershed Model Open
Frozen ground can be important to flood production and is often heterogeneous within a watershed due to spatial variations in the available energy, insulation by snowpack and ground cover, and the thermal and moisture properties of the soi…
View article: Monitoring of nonpoint source pollutants and sediments at the Ray Roberts Reservoir Wetland Complex, Texas
Monitoring of nonpoint source pollutants and sediments at the Ray Roberts Reservoir Wetland Complex, Texas Open
The fluctuation zone of reservoirs (that area between flood and conservation pool) provides lake managers an opportunity to develop water quality and wildlife enhancement projects on U.S. Army Corps of Engineers (USACE) lands. In 1991 the …
View article: Monitoring of sediments and nonpoint source pollution removal at the Spring Creek Wetland Project, Bowman-Haley Lake, North Dakota
Monitoring of sediments and nonpoint source pollution removal at the Spring Creek Wetland Project, Bowman-Haley Lake, North Dakota Open
Bowman-Haley Reservoir is a popular lake located along the western part of the North Dakota/South Dakota border. The lake was constructed in 1966 as a flood control and water supply reservoir. Although little of the water in the lake has b…
View article: An overview of current applications, challenges, and future trends in distributed process-based models in hydrology
An overview of current applications, challenges, and future trends in distributed process-based models in hydrology Open
View article: Simulation of reactive constituent fate and transport in hydrologic simulator GSSHA
Simulation of reactive constituent fate and transport in hydrologic simulator GSSHA Open
The purpose of this System-Wide Water Resources Program (SWWRP) technical note is to describe the new fate and transport routines in the Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model. GSSHA is a watershed analysis and manage…
View article: Demonstration of GSSHA hydrology and sediment at Eau Galle watershed near Spring Valley, Wisconsin
Demonstration of GSSHA hydrology and sediment at Eau Galle watershed near Spring Valley, Wisconsin Open
View article: Improved soil erosion and sediment transport in GSSHA
Improved soil erosion and sediment transport in GSSHA Open
To describe the new sediment transport formulation in GSSHA and demonstrate the improved capability in predicting storm-total sediment runoff using a research-quality data set. GSSHA simulates overland soil erosion and outputs erosion and …