Sumathy Sinnathamby

Sumathy Sinnathamby

Watershed Modeler/Data Analyst/ Environmental Scientist

Posts by Collection

publications

Pollinator decline: US Agro-Socio-Economic Impacts and Responses

Published in Journal of Natural & Environmental Sciences, 2013

In this paper we present a holistic evaluation of impacts and responses to pollinator decline in the US in an effort to summarize the spatial and temporal state of US pollinators, to review possible pressures and drivers of national pollinator decline, to examine the agro-socio-economic impact of the state of pollinators, and to provide a comprehensive insight into associated problems and solutions.

Recommended citation: Sinnathamby, S., Y. Assefa, A. Granger, L. Tabor, K. Douglas Mankin. (2013). "Pollinator decline: US Agro-Socio-Economic Impacts and Responses." J.Natural Environ.Sciences. 4(1). https://www.researchgate.net/publication/283908690_Pollinator_Decline_US_Agro-Socio-Economic_Impacts_and_Responses

The Environmental Effects of Crop Price Increases: Nitrogen Losses in the U.S. Corn Belt

Published in Journal of Environmental Economics and Management, 2014

In this paper we estimate the effect of crop prices on nitrogen lossesformostfieldsinIowa,Illinois,and Indiana using crop data from satellite imagery.

Recommended citation: Hendricks, N.P., S. Sinnathamby, K.R.Douglas-Mankin, A.Smith, D. A. Sumner, D.H. Earnhart. (2014). "The Environmental Effects of Crop Price Increases: Nitrogen Losses in the U.S. Corn Belt." Journal of Environmental Economics and Management. 68(3). https://www.sciencedirect.com/science/article/pii/S0095069614000710

Pasture BMP effectiveness using an HRU-based subarea approach in SWAT

Published in Journal of Environmental Management , 2015

This study develop and demonstrate a method to evaluate water-quality impacts and the effectiveness of two widely used BMPs on a livestock pasture: off-stream watering site and stream fencing.

Recommended citation: Sheshukov A.Y., K.R. Douglas-Mankin, S. Sinnathamby, P. Daggupati. (2015). "Pasture BMP effectiveness using an HRU-based subarea approach in SWAT." Journal of Environmental Management . 166(2016). https://www.researchgate.net/publication/283291308_Pasture_BMP_effectiveness_using_an_HRU-based_subarea_approach_in_SWAT

Impacts of biofuel-based land-use change on water quality and sustainability in a Kansas watershed

Published in Agricultural Water Management, 2016

In this paper water quality and sustainability indicators are used to evaluate the impacts of land-use change to increase corn and grain sorghum acreage for biofuel productionin the Perry Lake watershed in northeast Kansas.

Recommended citation: Yasarer L.W., S. Sinnathamby, B. Sturm. (2016). "Impacts of biofuel-based land-use change on water quality and sustainability in a Kansas watershed." Agricultural Water Management. 175(2016). https://www.sciencedirect.com/science/article/pii/S0378377416301585

Field-scale calibration of crop-yield parameters in the Soil and Water Assessment Tool (SWAT)

Published in Agricultural Water Management, 2017

This study evaluated crop sub-model parameters of Soil and Water Assessment Tool (SWAT), a widely used,physically based, hydrological model.

Recommended citation: Sinnathamby, S., K.R. Douglas-Mankin, C. Craige (2017). "Field-scale calibration of crop-yield parameters in the Soil and Water Assessment Tool (SWAT)." Agricultural Water Management. 180(2017). https://www.sciencedirect.com/science/article/pii/S0378377416304103

Ecohydrological index, native fish, and climate trends and relationships in the Kansas River basin

Published in Ecohydrology, 2018

This study quantified climatological and hydrological trends and relationships to presence and distribution of 2 native aquatic species in the Kansas River basin over the past half century.

Recommended citation: Sinnathamby, S., K.R. Douglas-Mankin, M.E. Muche, S.L. Hutchinson and A. Aavudai. (2018). "Ecohydrological index, native fish, and climate trends and relationships in the Kansas River basin." Ecohydrology. 11(1). https://doi.org/10.1002/eco.1909

A unified approach for protecting listed species and ecosystem services in isolated wetlands using community level protection goals

Published in Science of the Total Environment, 2019

This study explore a new strategy for protecting isolated wetlands and habitats.

Recommended citation: Raimondo,S., Sharpe,L., Oliver,L., McCaffrey,K.R., Purucker,S,T., Sinnathamby,S., and J. M. Minucci. (2019)." A unified approach for protecting listed species and ecosystem services in isolated wetlands using community-level protection goals." Science of The Total Environment. 11(1). https://doi.org/10.1016/j.scitotenv.2019.01.153

research

Watershed hydrologic and water quality modeling

Surface water resource modeling; processing and analyzing historical climate and hydrology data; multi-objective calibration and validation for better simulation of flow (both low and high); linking ecohydrological changes and biotic variables (fish species) at watershed scale; landuse impact on water quality; spatial heterogeneity of crop rotation response to price with implications for nitrogen Losses; and modeling pasture BMP effectiveness using a HRU-based subarea approach in SWAT

talks

teaching

Demonstrator

Undergraduate, Department of Animal Science, Faculty of Agriculture, University of Jaffna, Sri Lanka, 2003

Jun. 2003-Nov. 2003 Developed course materials and lectured to first and final year undergraduate classes in the areas of animal science; grade exams, assignments and oral examination; and prepared lab materials and conducted lab sessions

Assistant Lecturer

Undergraduate, Department of Animal Science, Faculty of Agriculture, University of Jaffna, Sri Lanka, 2003

Dec. 2003- Oct. 2004 Developed course materials and lectured to first and final year undergraduate classes in the areas of animal science; grade exams, assignments and oral examination; and prepared lab materials and conducted lab sessions

Student-Councilor

Undergraduate, Department of Animal Science, Faculty of Agriculture, University of Jaffna, Sri Lanka, 2004

Dec. 2004- Nov. 2007. Counseled faculty students to address issues such as academic performance, social skills, self-esteem, attendance, bullying, friendship issues, and conflict resolution.

Lecturer

Undergraduate, Department of Animal Science, Faculty of Agriculture, University of Jaffna, Sri Lanka, 2004

Dec. 2004- Nov. 2007. Developed course materials and lectured to first and final year undergraduate classes in the areas of animal science; grade exams, assignments and oral examination; and prepared lab materials and conducted lab sessions .

Lab instructor

Graduate course GIS in Water Resources Modeling (CE 537), Department of Civil Engineering, Boise State University, 2009

Jan. 2008- May. 2010 Lab instructor of a graduate-level course in GIS in Water Resources Modeling(CE 537).

Graduate Teaching Assistant

Graduate course Watershed Modeling / Advanced Watershed Modeling BAE 669/869, Department of Biological and Agricultural Engineering, Kansas State University, 2012

Spring 2010-Spring 2012 Developed lab materials and conducted lab sections on STEPL model setup, application, BMP simulations and load reductions in undergraduate/graduate-level course in Watershed Modeling (BAE 669) and undergraduate-level course in Watershed Management (ATM 661).

Graduate Teaching Assistant

Graduate course Watershed Modeling / Advanced Watershed Modeling BAE 669/869, Department of Biological and Agricultural Engineering, Kansas State University, 2014

Conducted lab sessions on SWAT model setup and application in undergraduate/graduate-level course in Watershed Modeling (BAE 669) .