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 ...

A grid-based integrated surface–groundwater model (GISMOD)

by IWA Publishing  (Nov. 4, 2015)

A distributed hydrological model, the Grid-based Integrated Surface-groundwater MODel (GISMOD), was developed to simulate hydrological processes by considering water interaction among different soil layers. The model integrates six modules. Basic information on catchment, such as the flow direction and the drainage network, can be obtained ...

The eReefs data brokering layer for hydrological and environmental data

by IWA Publishing  (Oct. 28, 2015)

The environmental sciences are witnessing a data revolution as large amounts of data are being made available at an increasing rate. Many datasets are being published through operational monitoring programs, research activities and global earth observation virtual laboratories. An important aspect is the ability to query relevant metadata ...

Multi-objective calibration of the physically based, spatially distributed SHETRAN hydrological model

by IWA Publishing  (Oct. 23, 2015)

Physically based, spatially distributed hydrological models have mostly been calibrated manually; a few were calibrated automatically but without full consideration of conflicting multi-objectives. Here, we successfully applied the non-dominated sorting genetic algorithm II (NSGA-II) and its two variants, namely the reference point-based ...

Study on the dynamic relation between spring discharge and precipitation in Fusong County, Changbai Mountain, Jilin Province of China

by IWA Publishing  (Oct. 20, 2015)

Mineral water is the main source of drinking water and is a dominant component of local economic development in Fusong County, Changbai Mountain, Jilin Province of China. Precipitation is the main recharge factor for mineral water in Fusong County; therefore, it is necessary to determine whether precipitation can effectively guarantee the ...

The hydrological performance of bioretention cells in regions with cold climates: seasonal variation and implications for design

by IWA Publishing  (Oct. 1, 2015)

Three bioretention cells in Norway were monitored for 23 to 36 months to evaluate the hydrological performance of bioretention cells operated in regions with cold climates and to test if cell size equations can be used to predict hydrological performance. Values of saturated hydraulic conductivity (Ksat) were determined for separate events by ...

Identification of the impacts of climate changes and human activities on runoff in the upper and middle reaches of the Heihe River basin, China

by IWA Publishing  (Sep. 16, 2015)

Detecting the effects of climate changes and human activities on river regimes would help to identify the original driving forces of hydrological disturbances and highlight the mechanisms of such hydrological processes under changing conditions. Two non-parametric tests (Mann-Kendall and Pettitt) were applied to detect the change point of ...

Adaptation to urbanization impacts on drainage in the city of Hohhot, China

by IWA Publishing  (Sep. 15, 2015)

This study presents a quantitative assessment of urbanization effects on hydrological runoff and drainage network in the city of Hohhot, China. The evolution of urban spatial morphology for the historical years (1987–2010) and projected year (2020) is described by changes in geographic information system (GIS)-based land use maps and further ...

Hydrology with impact: how does hydrological science inform decision-makers?

by IWA Publishing  (Sep. 8, 2015)

Water plays a central part in many aspects of life, and good hydrological science is needed to inform many decisions that affect human health and livelihoods. Hydrological scientists are aware of the importance of their work, and make great efforts to develop relevant research and advice. Decision-makers want to use the best science in their ...

Assessing differences in snowmelt-dependent hydrologic projections using CMIP3 and CMIP5 climate forcing data for the western United States

by IWA Publishing  (Sep. 8, 2015)

Most recent climate change impact studies are using Coupled Model Intercomparison Project Phase 5 (CMIP5) projections to replace older generation CMIP3 projections. Here we evaluate whether differences between projections based on comparable high emission pathways of a seven-member general circulation model CMIP3 versus CMIP5 ensemble change ...

Hydrological modelling under climate change considering nonstationarity and seasonal effects

by IWA Publishing  (Aug. 25, 2015)

Traditional hydrological modelling assumes that the catchment does not change with time. However, due to changes of climate and catchment conditions, this stationarity assumption may not be valid in the future. It is a challenge to make the hydrological model adaptive to the future climate and catchment conditions. In this study IHACRES, a ...

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