Management decisions related with water quality in lakes and reservoirs require a combined land-water processes study approach. This study reports on an integrated watershed-reservoir modeling methodology: the Soil and Water Assessment Tool (SWAT) model to estimate the nutrient input loads from the watershed, used afterwards as boundary conditions to the reservoir model, CE-QUAL-W2. The integra...

A computer model was created as a scientific and management tool for understanding the effects of macrophytes on hydrodynamics and water quality. A model was required that could simulate macrophytes in a complex water body and could be coupled to a multicompartment water quality model of phytoplankton, dissolved oxygen, nutrients, pH, and organic matter. This would permit the investigation of w...

The present study evaluated the impact of hydrological variability on hydrodynamics an urban lake in Brazil, considering water quality dynamics and its effects evaporation. Storm Water Management Model (SWMM) was applied to basin, two-dimensional model CE-QUAL-W2 used simulate two models were coupled carry out integrated basin-lake modeling. Then, applied: a transient complete mixing empirical ...

Abstract The rivers rejuvenate themselves by traveling over a distance, thereby they assimilate the pollution load and cause their own self-cleansing, also termed ‘Self-purification capacity’. To ascertain such assimilative capacity of river system, various water quality models (WQMs) were studied. Out numerous WQMs, six including QUAL2Kw, WASP, SWAT, SIMCAT, MIKE-11, CE-QUAL-W2 selected studie...

Imha Reservoir has both a water transfer tunnel connecting Andong and selective withdrawal facility (SWF), which enable the innovative operation of reservoir. Although these facilities had not been equipped when constructed in 1993, structural measures were applied afterward as needed for effective reservoir operation. The was 2015 to minimize spillway discharge during floods by moving other wi...

First posted June 6, 2022 For additional information, contact: Director, Oregon Water Science CenterU.S. Geological Survey2130 SW 5th AvenuePortland, 97201 Mechanistic river models capable of simulating hydrodynamics and stream temperature are valuable tools for investigating thermal conditions their relation to streamflow in basins where upstream water storage management decisions have an impo...

Algal blooms have been reported in some tributary bays since the initial impoundment of Three Gorges Reservoir, which has seriously affected water ecology and drinking safety. Hydrodynamics plays a crucial role algae growth. The recent numerical models hydrodynamics quality are effective to identify effects on phytoplankton find potential strategies for controlling algal blooms. In this study, ...

The authors investigate the hypothesis that phytoplankton blooms can be modeled by treating phytoplankton as discrete particles capable of selfinduced transport via buoyancy regulation or other behaviors. A particletracking model is inserted into the CE-QUAL-ICM eutrophication model. Phytoplankton are quantified as carbonaceous biomass attached to the particles. Kinetics are adapted from CE-QUA...

Tropical semi-arid regions suffer with recurrent droughts and uncertain water availability, but a few research studies have been conducted to further understand those complexities their relationships reservoir hydrodynamics. This study assessed the hydrodynamic processes of multiple-use located in Brazilian semiarid region. The aim was apply CE-QUAL-W2 model lake’s thermal structure its variabi...

First posted September 5, 2023 For additional information, contact: Director, Oregon Water Science CenterU.S. Geological Survey601 SW Second Avenue, Suite 1950Portland, 97204 Mechanistic models capable of simulating hydrodynamics and water temperature in rivers reservoirs are valuable tools for investigating thermal conditions their relation to dam operations streamflow river basins where upstr...