Hydrology Articles

499 Results found
  • Category: Soil & Groundwater ×

  • Subcategory: Hydrology ×

Travel time of curved parallel hillslopes

by IWA Publishing  (Apr. 10, 2014)

Travel time is an important variable that influences the hydrologic response of watersheds. Hydrologic models often do not take the variation of slope along the flow paths, i.e. profile curvature, directly into account. In this study, using a kinematic wave-based model, the effect of profile curvature on the travel time in parallel hillslopes is ...

Spatial prediction of the runoff coefficient in Southern Peninsular Italy for the index flood estimation

by IWA Publishing  (Apr. 10, 2014)

The runoff coefficient φ is a crucial parameter for the estimation of the mean value of annual maximum flood peak discharges in ungauged watersheds, where no direct measures are available. If the rational method is applied as a rainfall–runoff transformation model, the runoff coefficient accounts for all the hydrological losses, and ...

Historical analysis of rationalizing South West coastal polders of Bangladesh

by IWA Publishing  (Apr. 10, 2014)

After more than a decade of meeting the designated objective of increasing productivity in agriculture, the South West coastal polders of Bangladesh have ended up as different man-made disasters. The failure of the polders to deliver the intended outcome is basically attributed to the lack of understanding of their hydro-morphological ...

Examining differences in streamflow estimation for gauged and ungauged catchments using evolutionary data assimilation

by IWA Publishing  (Mar. 26, 2014)

Data assimilation has allowed hydrologists to account for imperfections in observations and uncertainties in model estimates. Typically, updated members are determined as a compromised merger between observations and model predictions. The merging procedure is conducted in decision space before model parameters are updated to reflect the ...

Sensitivity analysis for comparison, validation and physical legitimacy of neural network-based hydrological models

by IWA Publishing  (Mar. 26, 2014)

This paper addresses the difficult question of how to perform meaningful comparisons between neural network-based hydrological models and alternative modelling approaches. Standard, goodness-of-fit metric approaches are limited since they only assess numerical performance and not physical legitimacy of the means by which output is achieved. ...

WaterML2.0: development of an open standard for hydrological time-series data exchange

by IWA Publishing  (Mar. 26, 2014)

The increasing global demand on freshwater is resulting in nations improving their terrestrial water monitoring and reporting systems to better understand the availability, and quality, of this valuable resource. A barrier to this is the inability for stakeholders to share information relating to water observations data: traditional hydrological ...

Development of HydroClimatic Conceptual Streamflow (HCCS) model for tropical river basin

by IWA Publishing  (Mar. 25, 2014)

Combined processes of land-surface hydrology and hydroclimatology influence the response of a watershed to different hydroclimatic variables. In this paper, streamflow response of a watershed to hydrometeorological variables is investigated over a part of two tropical Indian rivers – Narmada and Mahanadi. The proposed HydroClimatic ...

Potential ecological impact of climate change on the water quality of an intensively managed agricultural watershed in Quebec, Canada

by IWA Publishing  (Mar. 25, 2014)

This study investigated the effects of climate change (CC) on water redistribution in a micro-watershed of a lowland agricultural area of the Bras d'Henri River in the temperate cold climate of Quebec, Canada. A Water Flow and Balance Simulation Model (WaSiM-ETH) was used to simulate the hydrology using current climatic conditions and land ...

Developing a foundation for eco‐epidemiological assessment of aquatic ecological status over large geographic regions utilizing existing data resources and models

by John Wiley & Sons, Ltd.  (Mar. 19, 2014)

Eco‐epidemiological studies utilizing existing monitoring program data provide a cost‐effective means to bridge the gap between ecological and chemical status of watersheds and to develop hypotheses of stressor attribution that can influence the design of higher‐tier assessments and subsequent management. The present study describes the process ...

A two-stage storage routing model for green roof runoff detention

by IWA Publishing  (Mar. 19, 2014)

Green roofs have been adopted in urban drainage systems to control the total quantity and volumetric flow rate of runoff. Modern green roof designs are multi-layered, their main components being vegetation, substrate and, in almost all cases, a separate drainage layer. Most current hydrological models of green roofs combine the modelling of the ...

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