A5000029428- Hydrology and Watershed Management Studies
- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Water Quality and Resources Studies
- Hydrological Forecasting Using AI
- Aquatic Ecosystems and Phytoplankton Dynamics
- Soil and Water Nutrient Dynamics
- Water Quality and Pollution Assessment
- Groundwater flow and contamination studies
- Water resources management and optimization
- Fluid dynamics and aerodynamics studies
- Scientific Research and Discoveries
- Wastewater Treatment and Nitrogen Removal
- Soil and Unsaturated Flow
- Water-Energy-Food Nexus Studies
- Oceanographic and Atmospheric Processes
- Environmental and Sediment Control
- Marine and coastal ecosystems
- Water Quality Monitoring Technologies
- Flood Risk Assessment and Management
- Additive Manufacturing and 3D Printing Technologies
- Aerosol Filtration and Electrostatic Precipitation
- Additive Manufacturing Materials and Processes
- Archaeology and Natural History
- Hydraulic flow and structures
Colorado School of Mines
2023-2024
Portland State University
2014-2023
Purdue University West Lafayette
2021-2022
Yerevan State University
2020
Jiangxi Normal University
2020
Chinese University of Hong Kong
2020
University of Oregon
2020
Appalachian State University
2020
China Three Gorges University
2016-2019
Quality Research
2014-2017
A large number and wide variety of lake ecosystem models have been developed published during the past four decades. We identify two challenges for making further progress in this field. One such challenge is to avoid developing more largely following concept others ('reinventing wheel'). The other focusing on only one type model, while ignoring new diverse approaches that become available ('having tunnel vision'). In paper, we aim at improving awareness existing knowledge concurrent...
Here, we present a community perspective on how to explore, exploit and evolve the diversity in aquatic ecosystem models. These models play an important role understanding functioning of ecosystems, filling observation gaps developing effective strategies for water quality management. In this spirit, numerous have been developed since 1970s. We set off explore model by making inventory among 42 modellers, categorizing resulting analysing them diversity. then focus comparing combining...
An extensive set of velocity and temperature measurements has been collected on two side arms Lake Anna, a cooling lake in Virginia. The data are consistent with the basic pattern layer exchange flow postulated several mathematical models arm circulation. Analysis suggests that circulation is controlled large part by inertial resistance head loss caused constrictions which formed highway bridge abutments located near entrances each arm. In addition to entrance constrictions, further...
Many agencies in the USA are developing management approaches to address water quality concerns and threatened endangered species habitat requirements bodies. of these bodies limited for temperature. Factors influencing stream temperature include: streamside vegetation, topographic shading, inflows outflows, width, depth, light extinction solar radiation. One key driving factors estimating a body heat budget is calculating amount radiation incident on surface. Even though it preferable...
Xiangxi River is a typical tributary of Three Gorges Reservoir (TGR) in China. Based on field observations 2010, thermal stratification was significant most months the year. Through data analysis and numerical simulations, seasonal spatial variation as related to impact operation TGR were investigated. Thermal pronounced from April September tributary. Air temperature (AT) water level (WL) two dominant variables impacting stratification. AT affected surface promoting formation...
Computational models are powerful tools to quantify physical phenomena gain valuable insights into a manufacturing process. Their accuracy is hindered, however, by uncertainty in the input data. Furthermore, when calibrating with plant measurements, it helps understand which variables have greatest effect on critical model outputs. This work applies quantification and sensitivity analysis determine most influential parameters CON1D of heat transfer solidification steel continuous casting...
A computer model was created as a scientific and management tool for understanding the effects of macrophytes on hydrodynamics water quality. required that could simulate in complex body be coupled to multicompartment quality phytoplankton, dissolved oxygen, nutrients, pH, organic matter. This would permit investigation resource issues where macrophyte growth, phytoplankton nutrient loadings, flood control were all contributing factors. The added compartment U.S. Army Corps Engineers...
Abstract A 2‐D hydrodynamic model was developed for modelling water circulation from 2008 to 2011 in a typical tributary of the Three Gorges Reservoir. The is capable describing flow behaviour and mixing mechanisms different density current patterns performs well computing velocity, intrusion layer at plunge point, travel distance current. effects 10 on thermal stratification, hydrodynamics, algal bloom risk are discussed classified terms growth. Patterns (6) (10) can effectively prevent...
A two and three-dimensional hydrothermal numerical model were developed calibrated for Laurance Lake, Oregon, USA. The scheme in the two-dimensional laterally averaged hydrodynamic water quality model, CE-QUAL-W2, was adapted a called W3, to solve governing equations of continuity, free surface equation, momentum. In order perform an equivalent comparison between results both models run using same meteorological data, boundary conditions flow temperature, heat exchange algorithms. reservoir...
Modeling the water quality of rivers and assessing effects changing conditions is often hindered by a lack in situ measurements for calibration. Here, we use combination satellite measurements, statistical models, numerical modeling with CE-QUAL-W2 to overcome data limitations evaluate effect hydrologic climate on temperature (Tw) Tigris River, one largest Middle East. Because few estimates Tw were available, remotely-sensed obtained from Landsat images at roughly 2 week intervals year 2009...
A model of temperature dynamics was developed as part a general activated‐sludge reactors. Transport heat described by the one‐dimensional, advection‐dispersion equation, with source term based on theoretical balance over reactor. The compared to several reference models, including tanks‐in‐series and dispersion components neglecting biochemical‐energy inputs other activated‐sludge, heat‐balance terms. All models were tested under steady‐state dynamic conditions at full‐scale facility, Rock...
Cyanobacteria often cause harmful algal blooms and release toxic substances that can harm humans animals. Accurately modeling these phytoplankton is a step towards predicting, preventing, controlling such blooms. Certain cyanobacteria species are known to migrate vertically in the water column on daily cycle. Capturing this behavior one aspect of their dynamics. Previous studies cyanobacterial vertical migration reviewed summarized. Several models movement tested using data from field...
Abstract The effect of thermal stratification and its relationship with water quality was researched by field observation in this study. Through assessing the degree calculating dimensionless parameter resistance to mixing (RTRM) indices from 2008 2010, it indicated that body Xiangxi River stratified strongly summer months. analysis both meteorological hydrodynamic factors showed intensity more sensitive River. between quality, results concentration Chlorophyll a higher epilimnion affected...
A new 3D hydrodynamic model was developed to simulate water quality transport in surface waterbodies. The governing equations are the continuity equation, free momentum equation and equation. 2D numerical scheme of CE-QUAL-W2 expanded three dimensions modified solve for elevation. time splitting technique employed formulation used a novel solution, which resulted tri-diagonal matrix form solving rather than more computationally intensive penta-diagonal solution. In addition, were solved at...
Wells SA, Berger CJ. 2016. Modeling the response of dissolved oxygen to phosphorus loading in Lake Spokane. Reserv Manage. 32:270–279.Mathematical models hydrodynamics and water quality are often used determine assimilative capacity a waterbody when waterbodies violate state standards. A model Spokane River eastern Washington was developed evaluate by setting total maximum daily load (TMDL). CE-QUAL-W2 this system establish TMDL limits for critical low-flow year 2001. recent paper evaluated...