The calibration and execution of large hydrological models, such as SWAT (soil and water assessment tool), developed for large areas, high resolution, and huge input data, need not only quite a long execution time but also high computation resources. SWAT hydrological model supports studies and predictions of the impact of land management practices on water, sediment, and agricultural chemical ...

Reliable and accurate streamflow prediction plays a critical role in watershed water resources planning management. We developed new hybrid SWAT-WSVR model based on 12 hydrological sites the Illinois River (IRW), U.S., that integrated Soil Water Assessment Tool (SWAT) with Support Vector Regression (SVR) calibration method coupled discrete wavelet transforms (DWT) to better support modeling wat...

The Soil and Water Assessment Tool SWAT was implemented in Northwest Arkansas to investigate flow and sediment predictive ability at multiple subbasin and hydrologic response units HRU distributions. The objectives of this study were to use SWAT and identify differences in annual predicted flow and sediment response of a watershed considering two subbasin delineations with six different HRU dis...

Applications of the Soil and Water Assessment Tool (SWAT) model typically involve delineation of a watershed into subwatersheds/subbasins that are then further subdivided into hydrologic response units (HRUs) which are homogeneous areas of aggregated soil, landuse, and slope and are the smallest modeling units used within the model. In a given standard SWAT application, multiple potential HRUs ...

The Soil and Water Assessment Tool (SWAT) does not fully simulate riparian buffers, but has a simple filter function that is responsive to filter strip width (FILTERW). The objectives of this study were to (1) evaluate SWAT hydrology and water quality response to changes in watershed subdivision levels and different FILTERW configurations and (2) provide guidance for selecting appropriate water...

0965-9978/$ see front matter 2008 Elsevier Ltd. A doi:10.1016/j.advengsoft.2008.08.002 * Corresponding author. Present address: Civil Eng ican University of Sharjah, P.O. Box 26666, Sharjah, U E-mail addresses: [email protected] ( edu.tr, [email protected] (E. Kahya). URL: http://atlas.cc.itu.edu.tr/~kahyae (E. Kahya). 1 Present address: Department of Water Engineering of Twente, P.O. Box...

Stress testing is essential for effective sizing, capacity planning, and service level management exercises. Unfortunately such testing can be a difficult and time-consuming process. In particular, for session-based Web applications, it is difficult to create synthetic workload traces that simultaneously satisfy inter-request dependencies and match the parameter values of many other attributes ...

A watershed model can be used to better understand the relationship between land use activities and hydrologic and water quality processes occurring within a watershed. Two different models, SWAT (Soil and Water Assessment Tool) and HSPF (Hydrologic Simulation ProgramFortran), were selected in this study to simulate stream flow, sediment, and nutrients loading from the Polecat Creek watershed i...

The size, scale, and number of subwatersheds can affect a watershed modeling process and subsequent results. The objective of this study was to determine the appropriate level of subwatershed division for simulating flow, sediment, and nutrients over 30 years for four Iowa watersheds ranging in size from 2,000 to 18,000 km2 with the Soil and Water Assessment Tool (SWAT) model. The results of th...

A modeling framework consisting of a farm-scale model, Agricultural Policy Environmental Extender (APEX); a watershed-scale model, Soil and Water Assessment Tool (SWAT); and databases was used in the Conservation Effects Assessment Project to quantify the environmental benefits of conservation practices on cropland. APEX is used to simulate conservation practices on cultivated cropland and Cons...