ANSWERS-2000: Runoff and Sediment Transport Model

Bouraoui, F.; Dillaha, Theo A.

doi:10.1061/(asce)0733-9372(1996)122:6(493)

Cited by 135 publications

(62 citation statements)

References 17 publications

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“…A variety of models have been designed for this purpose, including: the Soil and Water Assessment Tool, SWAT [1]; the Annualized Agricultural Non-Point Source model, AnnAGNPS [2]; the Areal Nonpoint Source Watershed Environment Response Simulation model, ANSWERS [3]; and, the Hydrological Simulation Program Fortran, HSPF [4,5] among others. The use of modeling, however, necessitates a certain degree of model accuracy.…”

Section: Introductionmentioning

confidence: 99%

Regionalization of SWAT Model Parameters for Use in Ungauged Watersheds

Gitau

Chaubey

2010

Water

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There has been a steady shift towards modeling and model-based approaches as primary methods of assessing watershed response to hydrologic inputs and land management, and of quantifying watershed-wide best management practice (BMP) effectiveness. Watershed models often require some degree of calibration and validation to achieve adequate watershed and therefore BMP representation. This is, however, only possible for gauged watersheds. There are many watersheds for which there are very little or no monitoring data available, thus the question as to whether it would be possible to extend and/or generalize model parameters obtained through calibration of gauged watersheds to ungauged watersheds within the same region. This study explored the possibility of developing regionalized model parameter sets for use in ungauged watersheds. The study evaluated two regionalization methods: global averaging, and regression-based parameters, on the SWAT model using data from priority watersheds in Arkansas. Resulting parameters were tested and model performance determined on three gauged watersheds. Nash-Sutcliffe efficiencies (NS) for stream flow obtained using this study indicate that regionalized parameter sets for the SWAT model can be obtained and used for making satisfactory hydrologic response predictions in ungauged watersheds.

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Section: Introductionmentioning

confidence: 99%

Regionalization of SWAT Model Parameters for Use in Ungauged Watersheds

Gitau

Chaubey

2010

Water

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“…The automatic characterization of stream networks is a necessary preliminary step for many computer-based hydrologic and geomorphic models (e.g. Moore et al 1991, Bouraoui and Dillaha 1996, Wilson and Gallant 2000, 2008, and therefore, the development of DEM processing algorithms as well as relevant software tools to extract hydrologic information from DEM, has been at the forefront of research (e.g. O'Callaghan and Mark 1984, Costa-Cabral and Burges 1994, Wolock and McCabe 1995, Moore et al 1996, Tarboton 1997, Wilson and Gallant 2000, Orlandini et al 2003.…”

Section: Applications Of Dems For Giuh-based Hydrological Modellingmentioning

confidence: 99%

“…Rodríguez-Iturbe and , Valdés et al (1979), , Gupta et al (1980), , Allam and Balkhair (1987), Al-Wagdany and Rao (1997) Geomorpho-climatic instantaneous unit hydrograph (GCIUH) Rodríguez-Iturbe et al (1982a, 1982b) Gamma GIUH model Duchesne et al (1997), Jin (1992), Van der Tak and Bras (1990) HGIUH (hydraulically based GIUH), Kirshen and Bras (1983) Kirkby (1976), Gupta et al (1986), Mesa and Mifflin (1986), Gupta and Mesa (1988), Naden (1992), Rinaldo et al (1995), Franchini and O'Connell (1996), Rinaldo and Rodriguez-Iturbe (1996), Gandolfi and Bischetti (1997) Mark (1984), Jenson and Domingue (1988), Fairfield and Leymarie (1991), Moore et al (1991Moore et al ( , 1996, Quinn et al (1991), Costa-Cabral and Burges (1994), Wolock and McCabe (1995), Bouraoui and Dillaha (1996), Tarboton (1997), Walker and Willgoose (1999), Wilson and Gallant (2000), Tarboton and Ames (2001), Orlandini et al (2003), Nardi et al (2006Nardi et al ( , 2008, Wilson et al (2007) (Continued )…”

Section: Geomorphological Instantaneous Unit Hydrograph (Giuh)-based mentioning

confidence: 99%

A review of the synthetic unit hydrograph: from the empirical UH to advanced geomorphological methods

Singh

Mishra

Jain

2014

Hydrological Sciences Journal

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“…based on the surface catchment area, of which 86% is derived from groundwater discharge from the Chalk aquifer in the upper part of the catchment. However, the groundwater catchment of the Pang differs from the surface catchment as the regional groundwater flow pattern is influenced by the Thames and by springs along the northern (Boorman et al, 1995) (Bouraoui and Dillaha, 1996;Haverkamp et al, 1998); a fully-distributed distributed, soil water balance model with varying root depth, Root Layer Model (RLM) (Ragab et al, 1997) (1993/4 and 1994/ 5). Monthly values of recharge (as hydrologically effective precipitation, HEP) for the same period based on grass cover and soils with a medium available water capacity and a single rainfall station were obtained from MORECS (version 2).…”

Section: Study Areamentioning

confidence: 99%

Simplicity versus complexity in modelling groundwater recharge in Chalk catchments

Bradford

Ragab

Crooks

et al. 2002

Hydrol. Earth Syst. Sci.

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Models of varying complexity are available to provide estimates of recharge in headwater Chalk catchments. Some measure of how estimates vary between different models can help guide the choice of model for a particular application. This paper compares recharge estimates derived from four models employing input data at varying spatial resolutions for a Chalk headwater catchment (River Pang, UK) over a fouryear period (1992)(1993)(1994)(1995) that includes a range of climatic conditions. One model was validated against river flow data to provide a measure of their relative performance. Each model gave similar total recharge for the crucial winter recharge period when evaporation is low. However, the simple models produced relatively lower estimates of the summer and early autumn recharge due to the way in which processes governing recharge especially evaporation and infiltration are represented. The relative uniformity of land use, soil types and rainfall across headwater, drift-free Chalk catchments suggests that complex, distributed models offer limited benefits for recharge estimates at the catchment scale compared to simple models. Nonetheless, distributed models would be justified for studies where the pattern and amount of recharge need to be known in greater detail and to provide more reliable estimates of recharge during years with low rainfall.

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ANSWERS-2000: Runoff and Sediment Transport Model

Cited by 135 publications

References 17 publications

Regionalization of SWAT Model Parameters for Use in Ungauged Watersheds

Regionalization of SWAT Model Parameters for Use in Ungauged Watersheds

A review of the synthetic unit hydrograph: from the empirical UH to advanced geomorphological methods

Simplicity versus complexity in modelling groundwater recharge in Chalk catchments

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