Hydrology Articles

47 Results found
  • Category: Soil & Groundwater ×

  • Subcategory: Hydrology ×

Green roof hydrologic performance and modeling: a review

by IWA Publishing  (Feb. 26, 2014)

Green roofs reduce runoff from impervious surfaces in urban development. This paper reviews the technical literature on green roof hydrology. Laboratory experiments and field measurements have shown that green roofs can reduce stormwater runoff volume by 30 to 86%, reduce peak flow rate by 22 to 93% and delay the peak flow by 0 to ...

Reconciling hydrology with engineering

by IWA Publishing  (Feb. 12, 2014)

Hydrology has played an important role in the birth of science. Yet practical hydrological knowledge, related to human needs for water storage, transfer and management, existed before the development of natural philosophy and science. In contemporary times, hydrology has had strong links with engineering as its development has been related to the ...

Simulating the hydrologic response of a semiarid watershed to switchgrass cultivation

by IWA Publishing  (Feb. 12, 2014)

The conversion of land from existing uses to biofuel cultivation is expected to increase given concerns about the sustainability of fossil fuel supplies. Nonetheless, research into the environmental impacts of biofuel crops, primarily the hydrological impacts of their cultivation, is in its infancy. To investigate such issues, the response of a ...

Using radar altimetry to update a large-scale hydrological model of the Brahmaputra river basin

by IWA Publishing  (Feb. 12, 2014)

Measurements of river and lake water levels from space-borne radar altimeters (past missions include ERS, Envisat, Jason, Topex) are useful for calibration and validation of large-scale hydrological models in poorly gauged river basins. Altimetry data availability over the downstream reaches of the Brahmaputra is excellent (17 high-quality ...

Improving calibration of two key parameters in Hydrologic Engineering Center hydrologic modelling system, and analysing the influence of initial loss on flood peak flows

by IWA Publishing  (Dec. 19, 2013)

Parameter calibration is a key and difficult issue for a hydrological model. Taking the Jinjiang Xixi watershed of south-east China as the study area, we proposed methods to improve the calibration of two very sensitive parameters, Muskingum K and initial loss, in the Hydrologic Engineering Center hydrologic modelling system (HEC-HMS) model. ...

Estimation of build–up and wash–off models parameters for an east–Australian catchment

by Inderscience Publishers  (Dec. 2, 2013)

This paper presents calibration of a catchment water quality model for continuous simulation of the water quality parameters from a catchment to the catchment outlet. The model is an integration of two sub–models: the hydrologic model and the water quality model. The hydrologic model estimates the amount of surface water runoff generated from the ...

Assessment of catchment response and calibration of a hydrological model using high-frequency discharge–nitrate concentration data

by IWA Publishing  (Nov. 20, 2013)

This study uses a high-frequency discharge and nitrate concentration dataset from the Weida catchment in Germany for the catchment scale hydrologic response analysis. Nitrate transport in the catchment is mostly conservative as indicated by the nitrate stable isotope (δ15N and δ18O) analysis. Discharge–nitrate concentration ...

Assessment of the effect of slope on runoff potential of a watershed using NRCS–CN method

by Inderscience Publishers  (Nov. 18, 2013)

The rainfall–runoff is a very complex hydrological phenomenon, as this process is highly non–linear, time–varying and spatially distributed. The average slope within the watershed together with the overall length and retardance of overland flow are considered to be the main factors which govern the runoff process. The Natural Resources ...

Sensitivity analysis of climate change impact on the hydrology of the Litani Basin in Lebanon

by Inderscience Publishers  (Sep. 12, 2013)

The effects of climate change on the surface water of the Litani Basin (Lebanon) are examined. A series of 82 hypothetical scenarios are imposed on each of the sub–basins' precipitation and temperature data and an integrated hydrological model is developed while conserving the other climate variables. A sensitivity analysis approach is applied to ...

Hydrologic sensitivity of the Upper San Joaquin River Watershed in California to climate change scenarios

by IWA Publishing  (Jul. 17, 2013)

To examine the hydrological system sensitivity of the southern Sierra Nevada Mountains of California to climate change scenarios (CCS), five headwater basins in the snow-dominated Upper San Joaquin River Watershed (USJRW) were selected for hydrologic simulations using the Hydrological Simulation Program-Fortran (HSPF) model. A pre-specified set ...

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