Hydrology Articles

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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 ...

A recipe for standards-based data sharing using open source software and low-cost electronics

by IWA Publishing  (Mar. 1, 2016)

Environmental data are critical to understanding environmental phenomena, yet their consistent collection and curation can be cost-prohibitive. This paper describes a recipe for the design, development, and deployment of a low-cost environmental data logging and transmission system for environmental sensors and its connection to an open source ...

Hybrid wavelet-support vector machine approach for modelling rainfall–runoff process

by IWA Publishing  (Jan. 25, 2016)

Because of the importance of water resources management, the need for accurate modeling of the rainfall–runoff process has rapidly grown in the past decades. Recently, the support vector machine (SVM) approach has been used by hydrologists for rainfall–runoff modeling and the other fields of hydrology. Similar to the other artificial ...

A watershed water quality evaluation model using data mining as an alternative to physical watershed models

by IWA Publishing  (Dec. 23, 2015)

This paper presents a data mining (DM)-based approach to developing a watershed water quality evaluation model (water quality evaluation model based on data mining (WQEMD)) as an alternative to physical watershed models. Three DM techniques (i.e. model tree, artificial neural network, and radial basis function) were employed to develop a WQEMD ...

HydroUnits: supporting dimensional analysis in hydrologic computing systems using sensor-based standards

by IWA Publishing  (Dec. 4, 2015)

Unit representation in the Transducer Electronic Data Sheet (TEDS) specified in the IEEE 1451 standards is a binary sequence of 10 octets that encode the physical units as a product of the seven Système International base units, plus radian and steradian, each raised to a rational power in addition to an unsigned integer indicating the ...

Evaluation of the applicability of the SWAT model in an arid piedmont plain oasis

by IWA Publishing  (Dec. 4, 2015)

Hetao Oasis is located in a typical piedmont alluvial plain bounded by the Langshan Mountain Range in the north, desert in the west, and the Yellow River in the south. Agricultural activities within the oasis significantly impact the hydrological cycle and water quality in downstream locations. The research uses the Soil and Water Assessment ...

Extending HydroShare to enable hydrologic time series data as social media

by IWA Publishing  (Nov. 27, 2015)

The Consortium of Universities for the Advancement of Hydrologic Science Inc. (CUAHSI) hydrologic information system (HIS) is a widely used service oriented system for time series data management. While this system is intended to empower the hydrologic sciences community with better data storage and distribution, it lacks support for the kind ...

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 ...

Reversing hydrology: quantifying the temporal aggregation effect of catchment rainfall estimation using sub-hourly data

by IWA Publishing  (Nov. 18, 2015)

Inferred rainfall sequences generated by a novel method of inverting a continuous time transfer function show a smoothed profile when compared to the observed rainfall, however, streamflow generated using the inferred catchment rainfall is almost identical to observed streamflow (Rt2 > 97%). This paper compares the effective rainfall ...

Simulating water flow in variably saturated soils: a comparison of a 3D model with approximation-based formulations

by IWA Publishing  (Nov. 13, 2015)

In hydrological models, variably saturated flow is often described using the Richards equation, either in a fully three-dimensional (3D) implementation or using a quasi-3D framework based on the 1D Richards equation for vertical flow and a flow-approximation for the other two dimensions. However, it is unclear in which configuration or under ...

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