Hydrology Articles

369 Results found
  • Category: Soil & Groundwater ×

  • Subcategory: Hydrology ×

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 ...

Linking North Slope of Alaska climate, hydrology, and fish migration

by IWA Publishing  (Jul. 20, 2015)

Arctic grayling (Thymallus arcticus) have a life-history strategy specifically adapted to the extreme climate of the North. These fish migrate to spawning grounds just after breakup in the spring, then migrate to feeding sites in early summer, and finally in the fall migrate back to their overwintering sites. The Kuparuk River is a perennial ...

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 ...

Data quality assessment in hydrological information systems

by IWA Publishing  (Jul. 3, 2015)

The hydrological data fed to hydrological decision support systems might be untimely, incomplete, inconsistent or illogical due to network congestion, low performance of servers, instrument failures, human errors, etc. It is imperative to assess, monitor and even control the quality of hydrological data residing in or acquired from each link of ...

Statistical evaluation of bioretention system for hydrologic performance

by IWA Publishing  (Jun. 3, 2015)

Long-term retention performance is a common performance indicator for low-impact development practices, such as rain barrels, rain gardens, and green roofs. This paper introduces a numerical approach for the estimation of annual retention ratios of stormwater by bioretention. The annual retention ratio is taken as the ratio of the annual ...

Probabilistic nature of storage delay parameter of the hydrologic model RORB: a case study for the Cooper's Creek catchment in Australia

by IWA Publishing  (Jun. 3, 2015)

In rainfall–runoff modeling, Design Event Approach is widely adopted in practice, which assumes that the rainfall depth of a given annual exceedance probability (AEP), can be converted to a flood peak of the same AEP by assuming a representative fixed value for the other model inputs/parameters such as temporal pattern, losses and ...

Characterisation of dissolved organic matter in the Lower Kinabatangan River, Sabah, Malaysia

by IWA Publishing  (Jun. 3, 2015)

Spatial patterns and trends in the concentration and quality of dissolved organic matter (DOM) are characterised across a tropical agricultural catchment using ultraviolet (UV)-visible absorbance, and fluorescence spectroscopy. Related determination of the environmental isotopes 18O and 2H clarify the dynamics of catchment water movement. Water ...

Statistical characteristics of rainfall in the Onkaparinga catchment in South Australia

by IWA Publishing  (Jun. 1, 2015)

The main objective of this study was to investigate the statistical characteristics of point rainfall and the novelty of the work was the development of a hybrid probability distribution that can model the full spectrum of daily rainfall in the Onkaparinga catchment in South Australia. Daily rainfall data from 1960 to 2010 at 13 rainfall ...

Hydrological projections based on the coupled hydrological–hydraulic modeling in the complex river network region: a case study in the Taihu basin, China

by IWA Publishing  (Jun. 1, 2015)

Water resources in the Taihu basin, China, are not only facing the effects of a changing climate but also consequences of an intensive urbanization process with the abandonment of rural activities and the resulting changes in land use/land-cover. In the present work, the impact of climate change and urbanization on hydrological processes was ...

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