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Establishment of a Habitat Monitoring Program to Assess Potential Impacts of Diversion of POTW Effluent
As part of the permitting process for a gas-fired power plant, the environmental impacts of diverting POTW effluent from the receiving water for cooling tower makeup was investigated....

Stochastic Modeling for Drought Analysis Using Thomas-Fiering Lognormal Three Parameter Model
Three variations of Thomas-Fiering log normal 3-parameter(TFLN3) model are fitted to the unregulated south-west monsoon-dependent monthly streamflows measured at Krishnarajasagara (KRS)...

Variance Estimation of Extreme Flows
The inclusion of historic flood data with gage record data has been shown to reduce the uncertainty in flow estimates. Using numerical integration to quantify that uncertainty is less...

Uptake of Contaminants by Overland Flow
A mathematical model is developed for the uptake of contaminants by overland flow. The model is based on the numerical solution of the Navier-Stokes equations coupled with a two-equation...

A Review of Fluid Movement in Compacted Clay: The Case of Macropore Flow
In constructing natural hydraulic barriers to infiltration, a typical design is one founded on the use of layers of compacted clay. Unfortunately, in analyzing the hydraulic performance...

Kinematic Mixing in Stratified Aquifers
The mixing process in heterogeneous aquifers is presented as the bending and stretching of material lines. A linear mixing efficiency is defined in terms of the mean values of a unit length...

Lower Missouri River Water Quality Model for Evaluating Flow Alterations
A modified version of the US Environmental Protection Agency's (USEPA) one-dimensional (longitudinal) stream water quality model, QUAL2E, was applied to the lower Missouri River to evaluate...

Peak Frequency Curves for the Middle Rio Grande
To define peak flow frequency curves for ten sites in the highly controlled and regulated Middle Rio Grande, an approach which relates peak inflow and peak outflow from the reservoirs...

Additional Years of Record and Peak Discharge
The effect of additional years of stream gaging records is analyzed for stream gages in Nebraska. Frequency estimates are based on procedures outlined in Bulletin 17B, including skew coefficient...

Dam-Break Study for Large Floodplain Area - A Case Study
In simulating a dam break flood in a large floodplain, the maximum flood level is sensitive to the off-channel storage volume used in the channel routing. An incorrect estimate of the...

An Integrated Software System for 3DFEMWATER: A 3D Grid Generator, A Graphical Post-Processor, and Additional Analysis Tools
An integrated software system for 3DFEMWATER has been developed to improve the groundwater flow modeling process. The system generates finite-element grids, graphically portrays simulation...

Modeling Two-Dimensional Subsurface Flow, Fate and Transport of Microbes and Chemicals
A two-dimensional model to simulate the subsurface flow, microbial growth-degradation, and transport and biodegradation of chemicals in groundwater environments (2DFATMIC) is developed....

A Two-Dimensional Flow and Hydrogeochemical Transport Model
A two-dimensional flow and hydrogeochemical transport model is designed for estimating the movement and attenuation of chemicals after they are released into subsurface systems. This model...

Stormwater Infiltration Design Based on Rainfall Statistics and Soil Hydraulics
When comparing stormwater infiltration with other methods for stormwater drainage an appropriate design procedure is necessary. The method proposed for future Danish guidelines is based...

Fate/Transport Modeling of Immiscible LNAPL in Unsaturated Aquifers
In the past ten years since enacting CERCLA and SARA regulations there is a lack of model to adequately address the fate/transport of immiscible constituents in groundwater systems. This...

Simulation of Contaminant Migration Under Conditions of Declining Ground Water Levels
A ground water flow and transport model was developed to simulate the migration of contaminants originating from an industrial site. The development and calibration of the model were based...

Protection of a 700-GPM Municipal Well Field with a 10-GPM Barrier Well: An Update After 8 Years of Remediation
In December 1978, a municipal well field developed by the Town of Acton, Massachusetts was shut down because of contamination by 1,1-dichloroethylene. Chemicals and process wash water...

Pumping or Slurry Walls?Which Works Best for Groundwater Containment?
Results of a numerical optimization model capable of designing containment systems for sites with three-dimensional groundwater flow indicate that site hydrogeology and economic considerations...

Adjustment of Groundwater Quality Models
Groundwater quality models have been used lately in solving cases dealing with groundwater flow and pollutant transport problems. Finite element method is used in such problems and is...

Watershed-Wide Stormwater Management Planning Issues
Pennsylvania counties are responsible for basinwide stormwater management planning under the Stormwater Management Act of 1978. The predominant engineering technique employed within these...

 

 

 

 

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