Publications

Signh_et_al_2018_preview

A Sensitivity Analysis of Impacts of Conservation Practices on Water Quality in L’Anguille River Watershed, Arkansas

Singh, G. and D. Saraswat. 2018. A Sensitivity
Analysis of Impacts of Conservation Practices on
Water Quality in L’Anguille River Watershed, Arkansas. Agricultural Water Management, Water, 10(4): 443.


Abstract: Assessing the performance of appropriate agricultural conservation practices (CPs) frequently relies on the use of simulation models as a cost-effective tool instead of depending solely...

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Leiva_et_al_2017_preview

Evaluating Remotely Sensed Plant Count Accuracy with Differing UAS Altitudes, Differing Canopy Separations and Ground Covers

Leiva, J.N., J. Robbins, D. Saraswat, Y. She and R. Ehsani. 2017. Evaluating Remotely Sensed Plant Count Accuracy with Differing UAS Altitudes, Differing Canopy Separations and Ground Covers. Journal of Applied Remote Sensing: CIGR Journal. 11(3):036003-1 to 036003-15.


Abstract: This study evaluated the effect of flight altitude and canopy separation of containergrown Fire Chief™ arborvitae (Thuja occidentalis L.) on counting accuracy. Images were taken...

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Leiva_et_al_2016_preview

Effect of plant canopy shape and flowers on plant count accuracy using remote sensing imagery

Leiva, J.N., J. Robbins, D. Saraswat, Y. She and R. Ehsani. 2016. Effect of Plant Canopy Shape and Flowers on Plant Count Accuracy Using Remote Sensing Imagery. Agricultural Engineering International: CIGR Journal. 18(2):73-82.


Abstract: Separate experiments were conducted to evaluate the effect of plant canopy shape and presence of flowers on counting accuracy of container-grown plants. Images were taken at 12 m above the ground. Two species of juniper...

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Singh_and_Saraswat_2016_preview

Development and evaluation of targeted marginal land mapping approach in SWAT model for simulating water quality impacts of selected second generation biofeedstock

Singh, G. and D. Saraswat. 2016. Development and Evaluation of Targeted Land Mapping Approach in SWAT Model for Simulating Water Quality Impacts of Selected Second Generation Biofeedstock. Environmental Modelling and Software. 81: 26-39.


Abstract: Information about location of marginal lands in a watershed is of interest to those who view these areas as potential land for producing biofuel crops. However, representing marginal lands into a distributed...

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Singh et al., 2018

Post-Model Validation of a Deterministic Watershed Model Using Measured Data

McCarty, J.A., B.E. Haggard, M. Matlock, N. Pai, and D. Saraswat. 2016. Post-Model Validation of a Deterministic Watershed Model Using Measured Data. Trans. ASABE. 59(2): 497-508.


Abstract: Data are often collected during or after hydrological and water quality (H/WQ) model development, thus limiting the ability for direct comparison or use in calibration and validation. In this study, we demonstrate a way to vali...

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Singh et al., 2018

Smartphone based Hierarchical Crowdsourcing for Weed Identification

Rahman, M., B. Blackwell, N., Banerjee, and D. Saraswat. 2015. Smartphone based Hierarchical Crowdsourcing for Weed Identification. Computers and Electronics in Agriculture 113: 14-23.


Abstract: Weed infestation is a common problem in agriculture that adversely affects crop production. Given severe constraints on the budget of many land-grant universities due to the economic downturn, exten...

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Singh et al., 2018

Hydrology and Water Quality Models: Documentation and Reporting Procedures for Calibration, Validation, and Use

Saraswat, D., J.R. Frankenberger, N. Pai, S. Ale, P. Daggupati, K.R. Douglas-Mankin, and M.A. Youseff. 2015. Hydrology and Water Quality Models: Documentation and Reporting Procedures for Calibration, Validation, and Use. Trans. ASABE. 58(6): 1787-1797.


Abstract: The increasing use of hydrologic and water quality (H/WQ) models for technical, policy, and legal decision making calls for greater transparency in communicating the methods used and decisions made when using H/WQ models.

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Singh et al., 2018

A Recommended Calibration and Validation Strategy for Hydrologic and Water Quality Models

Daggupati, P., N. Pai,S. Ale, K.R. Douglas-Mankin, R. W. Zeckoski, J. Jeong, P.B. Parajuli, D. Saraswat, M.A. Youseff. 2015. A Recommended Calibration and Validation Strategy for Hydrologic and Water Quality Models. Trans. ASABE. 58)6): 1705-1719.


Abstract: Hydrologic and water quality (H/WQ) models are widely used to support site-specific environmental assessment, design, planning, and decision making. Calibration and validation (C/V) are fundamental processes used to demon...

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Singh et al., 2018

Hydrologic and Water Quality Models: Key Calibration and Validation Topics

Moriasi, D., R. W. Zeckoski,J.G. Arnold, C.B. Baffaut, R.W. Malone, P. Daggupati, J.A. Guzman, Y. Yuan, D. Saraswat, B.W. Wilson, and A. Shirmohammadi. 2015. Hydrologic and Water Quality Models: Key Calibration and Validation Topics. Trans. ASABE. 58(6): 1609-1618.


Abstract: As a continuation of efforts to provide a common background and platform for development of calibration and validation (C/V) guidelines for hydrologic and water quality (H/WQ) modeling, ASABE members worked to determine...

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Singh et al., 2018

Impact of Land Use and Land Cover Categorical Uncertainty on SWAT Hydrologic Modeling

Pai, N and D. Saraswat. 2013. Impact of Land Use and Land Cover Categorical Uncertainty on SWAT Hydrologic Modeling. Trans. ASABE. 56(4): 1387-1397.


Abstract: The land use and land cover (LULC) map of a watershed is a critical input to the Soil and Water Assessment Tool (SWAT) model. LULC is a categorical geospatial data layer that is typically developed based on models that...

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Singh et al., 2018

A Geospatial Tool for Delineating Streambanks

Pai, N. and D. Saraswat. 2012. A Geospatial Tool for Delineating Streambanks. Environmental Modeling and Software, 40(2013), 151-159.


Abstract: Ecologists, civil engineers, and conservation managers currently lack an automated software tool for delineating streambanks, which is an important input for various hydrological studies. Therefore...

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Singh et al., 2018

Field_SWAT: A Tool for Mapping SWAT Output to Field Boundaries

Pai, N., D. Saraswat, and R.Srinivasan 2011. Field_SWAT: A Tool for Mapping SWAT Output to Field Boundaries. Computers and Geosciences.


Abstract: The Soil and Water Assessment Tool (SWAT) hydrological/water quality model divides a watershed into hydrological response units (HRUs) based on unique land cover, soil type, and slope. HRUs are a set of...

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Singh et al., 2018

Identifying Priority Subwatersheds Using Distributed Modeling Approach

Pai, N., D. Saraswat, and M. Daniel. 2011. Identifying Priority Subwatersheds Using Distributed Modeling Approach. Trans. ASABE 54(6): 2181-2196.


Abstract: This article describes a modeling approach for prioritizing 12‐digit hydrologic unit code subwatersheds in the Illinois River Drainage Area in Arkansas (IRDAA) watershed utilizing the soil and water assessment tool (SWAT) model...

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Singh et al., 2018

SWAT2009_LUC: A Tool to Activate Land Use Change Module in SWAT 2009

Pai, N. and D. Saraswat. 2011. SWAT2009_LUC: A Tool to Activate Land Use Change Module in SWAT 2009. Trans. ASABE. 54(5): 1649-1658. (2012 ASABE Superior Paper award winning paper).


Abstract: In watersheds where land use and land cover changes take place over the modeling period, using a single land use geospatial dataset is not a true representation of the watershed condition. This article describes development of...

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Singh et al., 2018

Biofuels and Water Quality: Challenges and Opportunities for Simulation Modeling

Engel, B., I. Chaubey, M. Thomas, D. Saraswat, P. Murphy, and B. Bhaduri. 2010. Biofuels and Water Quality: Challenges and Opportunities for Simulation Modeling. Future Science Group: Biofuels. 1(3): 463-477.


Abstract: Quantification of the various impacts of biofuel feedstock production on hydrology and water quality is complex. Mathematical models can be used to efficiently evaluate various ‘what if’ scenarios related to...

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Singh et al., 2018

Application of GPS and Near-Surface Geophysical Methods to Evaluate Agricultural Test Plot Differences

Allred, B., B. Clevenger, and D. Saraswat. 2009. Application of GPS and Near-Surface Geophysical Methods to Evaluate Agricultural Test Plot Differences. FastTimes. 14(3): 15-24.


Abstract: A field research facility with two pairs of replicated agricultural test plots (four total) was established at a location in northwest Ohio during 2005 for the purpose of studying water table...

Singh et al., 2018

Comparison of electromagnetic induction, capacitively-coupled resistivity, and galvanic contact resistivity methods for soil electrical conductivity measurement

Allred, B. J., R. Ehsani, and D. Saraswat. 2006. Comparison of electromagnetic induction, capacitively-coupled resistivity, and galvanic contact resistivity methods for soil electrical conductivity measurement. Applied Engineering in Agriculture. 22(2): 215-230.


Abstract: In situ measurement of apparent soil electrical conductivity (ECa) is an important precision agriculture tool useful for determining spatial changes in soil properties. Three near-surface geophysical methods are available for rapid...

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Singh et al., 2018

The Impact of temperature and shallow hydrologic conditions on the magnitude and spatial pattern consistency of electromagnetic induction measured soil electrical conductivity

Allred, B. J., R. Ehsani, and D. Saraswat. 2005. The Impact of temperature and shallow hydrologic conditions on the magnitude and spatial pattern consistency of electromagnetic induction measured soil electrical conductivity. Trans. ASAE, 48(6): 2123-2135.


Abstract: In situ measurement of apparent soil electrical conductivity (ECa) is an important precision agriculture tool for determining spatial changes in the soil properties affecting soil fertility. However, dynamic temperature and shallow...

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