Hydrology Articles

349 Results found
  • Category: Soil & Groundwater ×

  • Subcategory: Hydrology ×

iSTREEM®: An approach for broad‐scale in‐stream exposure assessment of “down‐the‐drain” chemicals

by John Wiley & Sons, Ltd.  (May 7, 2016)

The iSTREEM® model (“in‐stream exposure model”), a web‐based model made freely available to the public by the American Cleaning Institute, provides a means to estimate concentrations of “down‐the‐drain” chemicals in effluent, receiving waters, and drinking water intakes across national and regional scales under mean annual and low flow ...

Seasonal and flow‐driven dynamics of particulate and dissolved mercury and methylmercury in a stream impacted by an industrial mercury source

by John Wiley & Sons, Ltd.  (Nov. 18, 2015)

Sediments and floodplain soils in the East Fork Poplar Creek (EFPC) watershed in Oak Ridge, TN, are contaminated with high levels of mercury (Hg) from an industrial source at the headwaters. While baseflow conditions have been monitored, concentrations of Hg and methylmercury (MeHg) during high‐flow storm events, when the stream is more ...

Improving the efficiency of Monte Carlo Bayesian calibration of hydrologic models via model pre-emption

by IWA Publishing  (Aug. 21, 2015)

Bayesian inference via Markov Chain Monte Carlo (MCMC) sampling and sequential Monte Carlo (SMC) sampling are popular methods for uncertainty analysis in hydrological modelling. However, application of these methodologies can incur significant computational costs. This study investigated using model pre-emption for improving the computational ...

Using SWAT to simulate streamflow in Huifa River basin with ground and Fengyun precipitation data

by IWA Publishing  (Aug. 21, 2015)

High-resolution satellite precipitation products, which can provide a reasonable depiction of the spatial extent of rainfall, have been increasingly used to model hydrological processes. In this study, we introduced important satellite rainfall data – Fengyun (FY) precipitation product, and evaluated the data through streamflow simulation ...

A novel hybrid neural network based on continuity equation and fuzzy pattern-recognition for downstream daily river discharge forecasting

by IWA Publishing  (Aug. 21, 2015)

Forecasting of river discharge is crucial in hydrology and hydraulic engineering owing to its use in the design and management of water resource projects. The problem is customarily settled with data-driven models. In this research, a novel hybrid model which combines continuity equation and fuzzy pattern-recognition concept with artificial ...

A stochastic approach for extended partial blockage detection in viscoelastic pipelines: numerical and laboratory experiments

by IWA Publishing  (Aug. 6, 2015)

Partial blockages in water pipe networks may contribute to large energy dissipation throughout the system and reduce service effectiveness for customers. In this paper, a recently developed stochastic model using transients for detecting partial blockages in water pipelines is tested and numerical and experimental case studies are presented. The ...

Evaluation of environmental flow requirements using eco-hydrologic–hydraulic methods in perennial rivers

by IWA Publishing  (Jul. 24, 2015)

The assessment of environmental flows in rivers is of vital importance for preserving riverine ecosystem processes. This paper addresses the evaluation of environmental flow requirements in three reaches along a typical perennial river (the Zab transboundary river, in north-west Iran), using different hydraulic, hydrological and ecological ...

Arctic snow distribution patterns at the watershed scale

by IWA Publishing  (Jul. 20, 2015)

Watershed-scale hydrologic models require good estimates of spatially distributed snow water equivalent (SWE) at winter's end. Snow on the ground in arctic environments is susceptible to significant wind redistribution, which results in heterogeneous snowpacks. The scarcity and quality of data collected by snow gauges provides a poor ...

Recent changes in patterns of western Canadian river flow and association with climatic drivers

by IWA Publishing  (Jul. 20, 2015)

Climatic variability and change can have profound impacts on the hydrologic regime of a watershed, especially in regions that are sensitive to changes in climate, such as the northern latitudes and alpine-fed regions of western Canada. Quantifying historical spatial and temporal changes in hydrological data can provide useful information as to ...

Forest disturbance effects on snow and water yield in interior British Columbia

by IWA Publishing  (Jul. 20, 2015)

Long-term studies at Mayson Lake (ML) and Upper Penticton Creek (UPC) in British Columbia's southern interior quantify snow-dominated hydrologic response to natural disturbances and logging. Following natural disturbance at ML, changes in snow accumulation related directly to mountain pine beetle attack were measurable by the fifth year ...

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