Hydrology Articles

233 Results found
  • Category: Soil & Groundwater ×

  • Subcategory: Hydrology ×

An ecohydrologic model for a shallow groundwater urban environment

by IWA Publishing  (Dec. 15, 2014)

The urban environment is a patchwork of natural and artificial surfaces that results in complex interactions with and impacts to natural hydrologic cycles. Evapotranspiration is a major hydrologic flow that is often altered through urbanization, although the mechanisms of change are sometimes difficult to tease out due to difficulty in ...

Hydrological and environmental assessment of urban growth in a sub-tropical town in India

by IWA Publishing  (Dec. 15, 2014)

Roorkee, a sub-tropical urban town in India, has shown a rapid unplanned growth in the past. This paper presents the findings of a study of characteristics of urban soil, rainwater, and runoff emanating from different sources areas and the stormwater flows in the drains. Urban soil showed significant increase in the concentration of all ...

Modeling the hydrologic and economic efficacy of stormwater utility credit programs for US single family residences

by IWA Publishing  (Dec. 15, 2014)

As regulatory pressure to reduce the environmental impact of urban stormwater intensifies, US municipalities increasingly seek a dedicated source of funding for stormwater programs, such as a stormwater utility. In rare instances, single family residences are eligible for utility discounts for installing green infrastructure. This study examined ...

Metal Mixture Modeling Evaluation project: 2. Comparison of four modeling approaches

by John Wiley & Sons, Ltd.  (Nov. 24, 2014)

As part of the Metal Mixture Modeling Evaluation (MMME) project, models were developed by the National Institute of Advanced Industrial Science and Technology (Japan), the U.S. Geological Survey (USA), HDR׀HydroQual, Inc. (USA), and the Centre for Ecology and Hydrology (UK) to address the effects of metal mixtures on biological responses of ...

Effects of digital elevation model resolution on topography-based runoff simulation under uncertainty

by IWA Publishing  (Nov. 10, 2014)

Topography plays a critical role in controlling water dispersion and soil movement in hydrologic modeling for water resources management with raster-based digital elevation model (DEM). This study aims to model effects of DEM resolution on runoff simulation through coupling fuzzy analysis technique with a topography based rainfall–runoff ...

Hydrologic data as a human right? Equitable access to information as a resource for disaster risk reduction in transboundary river basins

by IWA Publishing  (Nov. 6, 2014)

Principles of equitable and reasonable use underpin international water agreements. Despite the potential for hydrologic information to enhance resilience to extreme events, comparable application of just principles to the distribution of hydrometeorological data is poorly established. Within the Ganges–Brahmaputra–Meghna (GBM) ...

Partnering in watershed management and community engagement case study

by Antea Group - USA  (Nov. 6, 2014)

Challenge: A Fortune 100 company requested our ecological expertise and support for its watershed management program and its pledge to replenish water used in production of its products back to nature and communities in the U.S. and Canada. Antea Group's assistance includes source water protection, community watershed partnerships, and technical ...

Modelling present and future Po river interactions with alluvial aquifers (Low Po River Plain, Italy)

by IWA Publishing  (Sep. 30, 2014)

A modelling study on a multi-layered confined/unconfined alluvial aquifer system was performed to quantify surface water/groundwater interactions. The calibrated groundwater flow model was used to forecast climate change impacts by implementing the results of a downscaled A1B model ensemble for the Po river valley. The modelled area is located ...

The impact of digital elevation model and land use spatial information on Hydrologic Simulation Program-FORTRAN – predicted stream flow and sediment uncertainty

by IWA Publishing  (Sep. 25, 2014)

The Hydrologic Simulation Program-FORTRAN (HSPF) model is widely used to develop management strategies for water resources. The spatial resolution of the input data used to parameterize the HSPF model may lead to uncertainty in model outputs. In this study, we evaluated the impact of the spatial resolution of the digital elevation model (DEM) ...

Improving the accuracy of a grid-based distributed hydrological model using slope and river length corrections in a large river basin: case Mekong

by IWA Publishing  (Aug. 12, 2014)

The effect of the grid cell size on a distributed hydrological model performance was investigated using five grid resolutions (1, 5, 10, 20 and 50 km) in a model for the Mekong Basin in Southeast Asia. Two main factors affecting computation results and related to topography and the grid cell size were identified: the terrain slope decreases and ...

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