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                    U.S. DEPARTMENT OF AGRICULTURE
 Southwest Watershed Research Center: Tucson, AZ
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ARS Home Pacific West Area Tucson, Arizona SWRC People & Locations







Chandra D Holifield Collins
                        Southwest Watershed Research Center

                        




                        
                        Soil Scientist
                        Phone: (520) 647-9287
                        
                        
                        Fax: (520) 670-5550(Employee information on this page comes from the REE Directory. Please contact your front office staff to update the REE Directory.)
                            **Publications**
                                                (Clicking on the reprint icon
                                                    Reprint Icon
                                                    will take you to the publication reprint.)Rangeland Brush Estimation Tool (RaBET): An operational remote sensing-based application for quantifying woody cover on western rangelands
                                                        

- (Peer Reviewed Journal)Holifield Collins, C.D., Skirvin, S., Kautz, M.A., Winston, Z., Curley, D., Corrales, A., Bishop, A., Bishop, N., Norton, C., Ponce-Campos, G., Armendariz, G.A., Metz, L., Heilman, P., Van Leeuwen, W. 2023. Rangeland Brush Estimation Tool (RaBET): An operational remote sensing-based application for quantifying woody cover on western rangelands. Remote Sensing. 15(21). Article 510. https://doi.org/10.3390/rs15215102.Performance of SMOS soil moisture products over core validation sites
                                                        

- (Peer Reviewed Journal)Colliander, A., Kerr, Y., Wigneron, J., Al-Yaari, A., Rodriguez-Fernandez, N., Li, X., Chaubell, J., Richaume, P., Mialon, A., Asanuma, J., Berg, A., Bosch, D.D., Caldwell, T., Cosh, M.H., Holifield Collins, C.D., Martinez-Fernandez, J., Mcnaim, H., Seyfried, M.S., Starks, P.J., Su, Z., Thibeault, M., Walker, J. 2023. Performance of SMOS soil moisture products over core validation sites. IEEE Geoscience and Remote Sensing Magazine. 20:1-5. https://doi.org/10.1109/LGRS.2023.3272878.Legacy earthen berms influence vegetation and hydrologic complexity in the Altar Valley, Arizona
                                                        

- (Peer Reviewed Journal)Nichols, M.H., Duke, S.E., Holifield Collins, C.D., Thompson, L. 2023. Legacy earthen berms influence vegetation and hydrologic complexity in the Altar Valley, Arizona. International Soil and Water Conservation Research. https://doi.org/10.1016/j.iswcr.2023.01.005.Application of a change detection soil moisture retrieval algorithm to combined, semiconcurrent radiometer, and radar observations
                                                        

- (Peer Reviewed Journal)Ouellette, J., Himani, T., Li, L., Colliander, S., Twarog, E., Goodrich, D.C., Holifield Collins, C.D., Cosh, M.H., Walker, J. 2022. Application of a change detection soil moisture retrieval algorithm to combined, semiconcurrent radiometer, and radar observations. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 15:9716-9721. https://doi.org/10.1109/JSTARS.2022.3219259.Multi-temporal LiDAR and hyperspectral data fusion for classification of semi-arid woody cover species
                                                        

- (Peer Reviewed Journal)Norton, C., Hartfield, K., Holifield Collins, C.D., van Leeuwen, W., Metz, L. 2022. Multi-temporal LiDAR and hyperspectral data fusion for classification of semi-arid woody cover species. Remote Sensing. 14(12). Article 2896. https://doi.org/10.3390/rs14122896.Thermal hydraulic disaggregation of SMAP soil moisture over continental United States
                                                        

- (Peer Reviewed Journal)Liu, P., Bindlish, R., O'Neil, P., Fang, B., Lakshmi, V., Yang, Z., Cosh, M.H., Bongiovanni, T., Holifield Collins, C.D., Starks, P.J., Prueger, J.H., Bosch, D.D., Seyfried, M.S., Williams, M.R. 2022. Thermal hydraulic disaggregation of SMAP soil moisture over continental United States. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 15:4072-4093. https://doi.org/10.1109/JSTARS.2022.3165644.Agroecoregions resulting from novel clustering methods: Production variables

- (Abstract Only)Holifield Collins, C.D., Baffaut, C., Bean, A., Clark, P., Coffin, A.W., Goslee, S.C., Hendrickson, J.R., Ponce-Campos, G., Sclater, V., Strickland, T.C. 2022. Agroecoregions resulting from novel clustering methods: Production variables. US-International Association for Landscape Ecology.Spatial definitions of working lands, LTAR croplands and grazinglands masks

- (Abstract Only)Ponce-Campos, G., Coffin, A.W., Gaffney, R., Holifield Collins, C.D., James, D. 2022. Spatial definitions of working lands, LTAR croplands and grazinglands masks. US-International Association for Landscape Ecology. 4/13/2022; Virtual 2022.Agroecosystem conceptual frameworks and methods

- (Abstract Only)Goslee, S.C., Baffaut, C., Coffin, A.W., Holifield Collins, C.D., Hurst, Z., Pisarello, K., Ponce-Campos, G., Witthaus, L.M. 2022. Agroecosystem conceptual frameworks and methods [abstract]. US-International Association for Landscape Ecology. P.1.Measuring the social and ecological performance of agricultural innovations on rangelands: Progress and plans for an indicator framework in the LTAR network
                                                        

- (Peer Reviewed Journal)Spiegal, S.A., Webb, N., Boughton, E., Boughton, R., Bentley-Brymer, A., Clark, P., Holifield Collins, C.D., Hoover, D.L., Kaplan, N.E., McCord, S.E., Meredith, G., Porensky, L.M., Toledo, D.N., Wilmer, H.N., Wulfhorst, J.D., Bestelmeyer, B.T. 2022. Measuring the social and ecological performance of agricultural innovations on rangelands: Progress and plans for an indicator framework in the LTAR network. Rangelands. 44:334-344. https://doi.org/10.1016/j.rala.2021.12.005.Regularized dual-channel algorithm for the retrieval of soil moisture and vegetation optical depth for SMAP
                                                        

- (Peer Reviewed Journal)Chaubell, J., Yueh, S., Dunbar, S., Andreas, C., Entekhabi, D., Chan, S., Chen, F., Xu, A., Bindlish, R., O'Neill, P., Asanuma, J., Berg, A., Bosch, D.D., Caldwell, T., Cosh, M.H., Holifield Collins, C.D., Jensen, K., Martinez-Fern, J., Mcnarin, H., Seyfried, M.S., Starks, P.J., Su, Z., Thibeault, M., Walker, J. 2022. Regularized dual-channel algorithm for the retrieval of soil moisture and vegetation optical depth for SMAP. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 15(2022):102-114. https://doi.org/10.1109/JSTARS.2021.3123932.Calibration and validation for the L2/3_SM_P version 8 and L2/3_SM_P_E version 5 data products

- (Government Publication)O’Neill, P., Chan, S., Bindlish, R., Chaubell, M., Colliander, A., Chen, F., Dunbar, S.. Jackson, T., Peng, J., Mousavi, M., Cosh, M., Bongiovanni, T., Walker, J., Wu, X., Berg, A., McNairn, H., Thibeault, M., Martínez-Fernández, J., González-Zamora, A., Lopez-Baeza, E., Jensen, K., Seyfried, M., Bosch, D., Starks, P., Holifield Collins, C., Prueger, J., Su, Z., van der Velde, R., Asanuma, J., Palecki, M., Small, E., Zreda, M., Calvet, J., Crow, W., Kerr, Y., Yueh, S., and Entekhabi, D., October 12, 2021.  Calibration and Validation for the L2/3_SM_P Version 8 and L2/3_SM_P_E Version 5 Data Products, SMAP Project, JPL D-56297, Jet Propulsion Laboratory, Pasadena, CA.Understanding temporal stability: A long-term analysis of USDA ARS watersheds
                                                        

- (Peer Reviewed Journal)Coopersmith, E., Cosh, M.H., Starks, P.J., Bosch, D.D., Holifield Collins, C.D., Seyfried, M.S., Livingston, S.J., Prueger, J.H. 2021. Understanding temporal stability: A long-term analysis of USDA ARS watersheds. International Journal of Digital Earth. https://doi.org/10.1080/17538947.2021.1943550.Validation of soil moisture data products from the NASA SMAP mission
                                                        

- (Peer Reviewed Journal)Colliander, A. Reichle, R.H., Crow, W.T., Cosh, M.H., Chen, F., Chan, S., Das, N., Bindlish, R., Chaubell, M.J., Kim, S.B., Liu, Q., O’Neill, P., Dunbar, R.S., Dang,  L., Kimball, J., Jackson, T.J., al Jassar, J.K., Asanuma, J., Bhattacharya, B.K., Berg, A., Bosch, D.D., Bourgeau-Chavez, L., Caldwell, T., Calvet, J-C., Dorigo, W., Holifield Collins, C., Jensen, K., Livingston, S., Lopez-Baeza, E., Martínez-Fernández, J.,  McNairn, H., Moghaddam, M., Montzka, C., Notarnicola, C., Pellarin, T., Prueger, J., Pulliainen, J., Ramos, J., Seyfried, M., Starks, P., Su, Z., van der Velde, R., Zeng, Y., Thibeault, M., Walker, J.P., Zribi, M., Entekhabi, D., and Yueh, S. 2022. Validation of Soil Moisture Data Products from the NASA SMAP Mission. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 15:364-392. https://doi.org/10.1109/JSTARS.2021.3124743.The Long-Term Agroecosystem Research network standard GIS data layers
                                                        

- (Database / Dataset)Armendariz, G., Coffin, A.W., Archer, D.W., Arthur, D.K., Bean, A.R., Browning, D.M., Carlson, B.R., Clark, P., Flynn, K.C., Goslee, S.C., Sclater, V., Sudduth, K.A., Kaplan, N.E., Stinner, J.H., King, K.W., Spiegal, S.A., Hsieh, H., Moglen, G.E., Yasarer, L.M., Kettler, T.A., Schmer, M.R., Teet, S.B., Starks, P.J., Hall, V.O., Wagner, S.W., Johnson, J.M., Holifield Collins, C.D., Kautz, M.A. 2021. The Long-Term Agroecosystem Research network standard GIS data layers. Ag Data Commons. https://doi.org/10.15482/USDA.ADC/1521161.Regional frameworks for the USDA Long-Term Agroecosystem research (LTAR) Network: Preliminary concepts and potential indicators
                                                        

- (Peer Reviewed Journal)Bean, A.R., Coffin, A.W., Arthur, D.K., Baffaut, C., Holifield Collins, C.D., Goslee, S.C., Ponce Campos, G.E., Sclater, V., Strickland, T.C., Yasarer, L.M. 2021. Regional frameworks for the USDA Long-Term Agroecosystem research (LTAR) Network: Preliminary concepts and potential indicators. Frontiers in Sustainable Food Systems. 4:612785. https://doi.org/10.3389/fsufs.2020.612785.Assessing disaggregated SMAP soil moisture products in the United States
                                                        

- (Peer Reviewed Journal)Liu, P., Bindlish, R., Fang, B., Lakshmi, V., O'Neill, P., Yang, Z., Cosh, M.H., Bongiovqnni, T., Bosch, D.D., Holifield Collins, C.D., Starks, P.J., Prueger, J.H., Seyfried, M.S., Livingston, S.J. 2021. Assessing disaggregated SMAP soil moisture products in the United States. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 14:2577-2592. https://doi.org/10.1109/JSTARS.2021.3056001.Evaluation of SMAP core validation site representativeness errors using dense networks of in situ sensors and random forests
                                                        

- (Peer Reviewed Journal)Whitcomb, J., Clewley, D., Colliander, A., Cosh, M.H., Powers, J., Friesen, M., McNairn, H., Berg, A., Bosch, D.D., Coffin, A.W., Holifield Collins, C.D., Prueger, J.H., Entekhabi, D., Moghaddam, M. 2020. Evaluation of SMAP core validation site representativeness errors using dense networks of in situ sensors and random forests. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 13:6457-6472. https://doi.org/10.1109/JSTARS.2020.3033591.Global soil moisture retrievals from the Chinese FY-3D microwave radiation imager
                                                        

- (Peer Reviewed Journal)Kang, C.S., Zhao, T., Shi, J.C., Cosh, M.H., Chen, Y., Starks, P.J., Holifield Collins, C.D., Wu, S., Sun, R., Zheng, J. 2020. Global soil moisture retrievals from the Chinese FY-3D microwave radiation imager. IEEE Transactions on Geoscience and Remote Sensing. https://doi.org/10.1109/TGRS.2020.3019408.Global scale error assessments of soil moisture estimates from microwave-based active and passive satellites and land surface models over forest and mixed irrigated/dryland agriculture regions
                                                        

- (Peer Reviewed Journal)Kim, H., Wigneron, J., Kumar, S., Dong, J., Wagner, W., Cosh, M.H., Bosch, D.D., Holifield Collins, C.D., Starks, P.J., Seyfried, M.S., Lakshmi, V. 2020. Global scale error assessments of soil moisture estimates from microwave-based active and passive satellites and land surface models over forest and mixed irrigated/dryland agriculture regions. Remote Sensing of Environment. 251:112052. https://doi.org/10.1016/j.rse.2020.112052.Assessing the impact of soil layer specification on the observability of modeled soil moisture and brightness temperature
                                                        

- (Peer Reviewed Journal)Shelito, P., Kumar, S., Santanello, J., Lawston, P., Bolton, J., Cosh, M.H., Bosch, D.D., Holifield Collins, C.D., Livingston, S.J., Prueger, J.H., Seyfried, M.S., Starks, P.J. 2020. Assessing the impact of soil layer specification on the observability of modeled soil moisture and brightness temperature. Journal of Hydrometeorology. 21(9):2041-2060. https://doi.org/10.1175/JHM-D-19-0280.1.Comparison of microwave remote sensing and land surface modeling for surface soil moisture climatology estimation
                                                        

- (Peer Reviewed Journal)Dong, J., Crow, W.T., Tobin, K., Cosh, M.H., Bosch, D.D., Starks, P.J., Seyfried, M.S., Holifield Collins, C.D. 2020. Comparison of microwave remote sensing and land surface modeling for surface soil moisture climatology estimation. Remote Sensing of Environment. 242:111756. https://doi.org/10.1016/j.rse.2020.111756.An intercomparison study of algorithms for downscaling SMAP radiometer soil moisture retrievals
                                                        

- (Peer Reviewed Journal)Fang, L., Zhan, X., Yin, J., Schull, M., Walker, J., Wen, J., Cosh, M.H., Lakankar, T., Holifield Collins, C.D., Bosch, D.D., Starks, P.J., Caldwell, T. 2020. An intercomparison study of algorithms for downscaling SMAP radiometer soil moisture retrievals. Journal of Hydrometeorology. 21(8):1761-1775. https://doi.org/10.1175/JHM-D-19-0034.1.Effect of rainfall events on SMAP radiometer-based soil moisture accuracy using core validation sites

- (Peer Reviewed Journal)Colliander, A., Jackson, T., Berg, A., Bosch, D.D., Caldwell, T., Chan, S., Cosh, M.H., Holifield Collins, C.D., Martinez-Fernandez, J., Mcnairn, H., Prueger, J.H., Starks, P.J., Walker, J., Yueh, S. 2020. Effect of rainfall events on SMAP radiometer-based soil moisture accuracy using core validation sites. Journal of Hydrometeorology. 21:255-264.Improved SMAP dual-channel algorithm for the retrieval of soil moisture
                                                        

- (Peer Reviewed Journal)Chaubell, J., Yueh, S., Dunbar, S., Colliander, A., Chen, F., Chan, S., Entekhabi, D., Bindlish, R., O'Neill, P., Asansuma, J., Berg, A., Bosch, D.D., Caldwell, T., Cosh, M.H., Holifield Collins, C.D., Martinez-Fernandez, J., Seyfried, M.S., Starks, P.J., Su, Z., Thibeault, M., Walker, J. 2020. Improved SMAP dual-channel algorithm for the retrieval of soil moisture. IEEE Transactions on Geoscience and Remote Sensing. 58(6):3894-3905. https://doi.org/10.1109/TGRS.2019.2959239.The SMAP and Copernicus Sentinel 1A/B microwave active-passive, high-resolution surface soil moisture product
                                                        

- (Peer Reviewed Journal)Das, N., Entekhabi, D., Dunbar, R., Caubell, M., Colliander, A., Yueh, S., Jaghuber, T., Chen, F., Crow, W.T., O'Neil, P., Walker, J., Berg, A., Bosch, D.D., Caldwell, T., Cosh, M.H., Holifield Collins, C.D., Lopez-Baeza, E., Thibeault, M. 2019. The SMAP and Copernicus Sentinel 1A/B microwave active-passive, high-resolution surface soil moisture product. Remote Sensing of Environment. https://doi.org/10.1016/j.rse.2019.111380.Evaluation of Conservation Effects Assessment Project Grazing Lands conservation practices on the Cienega Creek Watershed in southeast Arizona with RHEM/KINERSO2/AGWA modeling tools
                                                        

- (Peer Reviewed Journal)Goodrich, D.C., Wei, H., Burns, I., Guertin, D., Spaeth, K., Hernandez Narvaez, M.N., Holifield Collins, C.D., Kautz, M.A., Heilman, P., Levick, L., Ponce Campos, G.E., Carrillo, E., Tiller, R. 2020. Evaluation of Conservation Effects Assessment Project Grazing Lands conservation practices on the Cienega Creek Watershed in southeast Arizona with RHEM/KINERSO2/AGWA modeling tools. Journal of Soil and Water Conservation. 75(3):304-318. https://doi.org/10.2489/jswc.75.3.304.Uncertainty of reference pixel soil moisture averages sampled at SMAP core validation sites
                                                        

- (Peer Reviewed Journal)Chen, F., Crow, W.T., Cosh, M.H., Colliander, A., Asanuma, J., Berg, A., Bosch, D.D., Caldwell, T., Holifield Collins, C.D., Martinez-Fernandez, J., Mcnairn, H., Starks, P.J., Su, Z., Walker, J. 2019. Uncertainty of reference pixel soil moisture averages sampled at SMAP core validation sites. Journal of Hydrometeorology. https://doi.org/10.1175/JHM-D-19-0049.1.A method for assessing SMAP core validation site scaling bias using enhanced sampling and random forests

- (Proceedings)Witcomb, J., Moghaddam, M., Clewley, D., Colliander, Cosh, M.H., Powers, J., Friesen, M., Mcnaim, H., Berg, A., Bosch, D.D., Holifield Collins, C.D., Prueger, J.H., Entekhabi, D. 2019. A method for assessing SMAP core validation site scaling bias using enhanced sampling and random forests.Proceedings of the IEEE International Geoscience and Remote Sensing Symposium. Paper No. 4461.Hydrologic model parameterization using dynamic Landsat-based vegetative estimates within a semiarid grassland
                                                        

- (Peer Reviewed Journal)Kautz, M.A., Holifield Collins, C.D., Guertin, D., Goodrich, D.C., Van Leeuwen, W., Williams, C.J. 2019. Hydrologic model parameterization using dynamic Landsat-based vegetative estimates within a semiarid grassland. Journal of Hydrology. 575:1073-1086. https://doi.org/10.1016/j.jhydrol.2019.05.044.The SMAP mission combined active-passive soil moisture product at 9km and 3km spatial resolutions
                                                        

- (Peer Reviewed Journal)Das, N., Entekhabi, D., Dunbar, R., Colliander, A., Chen, F., Crow, W.T., Jackson, T.J., Berg, A., Bosch, D.D., Caldwell, T., Cosh, M.H., Holifield Collins, C.D., Lopez-Baeza, E. 2018. The SMAP mission combined active-passive soil moisture product at 9 km and 3km spatial resolutions. Remote Sensing of Environment. 211:204-217. https://doi.org/10.1016/j.rse.2018.04.011.An assessment of the differences between spatial resolution and grid size for the SMAP enhanced soil moisture product over homogeneous sites
                                                        

- (Peer Reviewed Journal)Colliander, A., Jackson, T.J., Chan, S., O'Neill, P., Bindlish, R., Cosh, M.H., Caldwell, T., Walker, J., Berg, A., McNairn, H., Thibeault, M., Martinez-Fernandez, J., Jensen, K., Asanuma, J., Seyfried, M.S., Bosch, D.D., Starks, P., Holifield Collins, C.D., Prueger, J.H., Su, Z., Lopez-Beeza, E., Yeuh, S. 2018. An assessment of the differences between spatial resolution and grid size for the SMAP enhanced soil moisture product over homogeneous sites. Remote Sensing of Environment. 207:65-70.Identifying agro-ecoregions for the Long Term Agroecosystem Research (LTAR) network

- (Abstract Only)Estimating surface soil moisture from SMAP observations using a neural network technique
                                                        

- (Peer Reviewed Journal)Kolassa, J., Reichle, R., Lui, Q., Alemohammad, S., Gentine, P., Aida, K., Asanuma, J., Bircher, S., Caldwell, T., Colliander, A., Cosh, M.H., Holifield Collins, C.D., Jackson, T.J., Jensen, K., Martinez-Fernandez, J., Mcnairn, H., Pacheco, A., Thibeault, M., Walker, J. 2018. Estimating surface soil moisture from SMAP observations using a neural network technique. Remote Sensing of Environment. 204:43-59. https://doi.org/10.1016/j.rse.2017.10.045.Rainfall simulation experiments in the Southwestern USA using the Walnut Gulch rainfall simulator
                                                        

- (Peer Reviewed Journal)Polyakov, V.O., Stone, J., Holifield Collins, C.D., Nearing, M.A., Paige, G., Buono, J., Gomez-Pond, R. 2018. Rainfall simulation experiments in the Southwestern USA using the Walnut Gulch rainfall simulator. Earth System Science Data. 10:19-26. https://doi.org/10.5194/essd-10-19-2018.Assessment of the SMAP Level-4 surface and root-zone soil moisture product using in situ measurements
                                                        

- (Peer Reviewed Journal)Reichle, R., De Lannoy, G., Liu, Q., Ardizonne, J., Colliander, A., Conaty, A., Crow, W.T., Jackson, T.J., Jones, L., Kimball, J., Koster, R., Mahanama, S., Smith, E., Berg, A., Bircher, S., Bosch, D.D., Caldwell, T., Cosh, M.H., Gonzalez-Zanora, A., Holifield Collins, C.D., Livingston, S.J., Lopez-Baeza, E., Martinez-Fernandez, J., McNairn, H., Moghaddam, M., Pacheco, A., Pellarin, T., Prueger, J.H., Rowlandson, T., Seyfried, M.S., Starks, P.J., Su, Z., Thibeault, M., Uldall, F., van der Velde, R., Walker, J., Wu, X., Zeng, Y. 2017. Assessment of the SMAP Level-4 surface and root-zone soil moisture product using in situ measurements. Journal of Hydrometeorology. 18(10):2621-2645. https://doi.org/10.1175/JHM-D-17-0063.1.Data assimilation to extract soil moisture information from SMAP observations
                                                        

- (Peer Reviewed Journal)Kolassa, J., Reichle, R., Liu, Q., Cosh, M.H., Bosch, D.D., Caldwell, T., Colliander, A., Holifield Collins, C.D., Jackson, T.J., Livingston, S.J., Moghaddam, M., Starks, P.J. 2017. Data assimilation to extract soil moisture information from SMAP observations. Remote Sensing. 9(11):1179. https://doi.org/10.3390/rs9111179.GCOM-W AMSR2 soil moisture product validation using core validation sites
                                                        

- (Peer Reviewed Journal)Bindlish, R., Cosh, M.H., Jackson, T.J., Koike, T., Fuiji, X., De Jeu,, R., Chan, S., Asanuma, J., Berg, A., Bosch, D.D., Caldwell, T., Holifield Collins, C.D., McNairn, H., Martinez-Fernandez, J., Prueger, J.H., Rowlandson, T., Seyfried, M.S., Starks, P.J., Su, Z., Thibeault, M., van der Velde, R., Walker, J., Coopersmith, E. 2018. GCOM-W AMSR2 soil moisture product validation using core validation sites. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 11(1):209-219. https://doi.org/10.1109/JSTARS.2017.2754293.The Rangeland Hydrology and Erosion Model: A dynamic approach for predicting soil loss on rangelands
                                                        

- (Peer Reviewed Journal)Hernandez Narvaez, M.N., Nearing, M.A., Al-Hamdan, O., Pierson, F.B., Armendariz, G.A., Weltz, M.A., Spaeth, K., Williams, C.J., Goodrich, D.C., Unkrich, C.L., Nichols, M.H., Holifield Collins, C.D. 2017. The Rangeland Hydrology and Erosion Model: A dynamic approach for predicting soil loss on rangelands. Water Resources Research. 53:1-24. https://doi.org/10.1002/2017WR020651.Development and assessment of the SMAP enhanced passive soil moisture product
                                                        

- (Peer Reviewed Journal)Chan, S., Bindlish, R., O'Neill, P., Jackson, T.J., Njoku, E., Dunbar, R., Chaubell, J., Peipmeier, J., Yueh, S., Entekhabi, D., Colliander, A., Chen, F., Cosh, M.H., Caldwell, T., Walker, J., Berg, A., McNairn, H., Thibeault, M., Martinez-Fernandez, J., Udall, F., Seyfried, M.S., Bosch, D.D., Starks, P.J., Holifield Collins, C.D., Prueger, J.H., Crow, W.T. 2018. Development and assessment of the SMAP enhanced passive soil moisture product. Remote Sensing of Environment. 204:931-941. https://doi.org/10.1016/j.rse.2017.08.025.Validation and scaling of soil moisture in a semi-arid environment: SMAP Validation Experiment 2015 (SMAPVEX15)

- (Peer Reviewed Journal)Colliander, A., Cosh, M.H., Misra, S., Jackson, T.J., Crow, W.T., Chan, S., Bindlish, R., Chae, C., Holifield Collins, C.D., Yueh, S. 2017. Validation and scaling of soil moisture in a semi-arid environment: SMAP Validation Experiment 2015 (SMAPVEX15). Remote Sensing of Environment. 196:101-112.Strategies for validating satellite soil moisture products using in situ networks: Lessons from the USDA-ARS watersheds
                                                        

- (Abstract Only)Cosh, M.H., Jackson, T.J., Starks, P.J., Bosch, D.D., Holifield Collins, C.D., Seyfried, M.S., Prueger, J.H., Livingston, S.J., Bindlish, R. 2017. Strategies for validating satellite soil moisture products using in situ networks: Lessons from the USDA-ARS watersheds [abstract]. IEEE IGARSS Annual Proceedings. https://doi.org/10.1109/IGARSS.2017.8127377.Analysis of in situ resources of for the Soil Moisture Active Passive Validation Experiments in 2015 and 2016

- (Abstract Only)Cosh, M.H., Jackson, T.J., Colliander, A., Bindlish, R., Mckee, L.G., Goodrich, D.C., Prueger, J.H., Hornbuckle, B., Coopersmith, E., Holifield Collins, C.D., Smith, J.R. 2016. Analysis of in situ resources of for the Soil Moisture Active Passive Validation Experiments in 2015 and 2016. American Geophysical Union.  Abs. EP43E-03..Agroecosystem research with big data and a modified scientific method using machine learning concepts
                                                        

- (Peer Reviewed Journal)Moran, M.S., Heilman, P., Peters, D.C., Holifield Collins, C.D. 2016. Agroecosystem research with big data and a modified scientific method using machine learning concepts. Ecosphere. 7(10):e01493. https://doi.org/10.1002/ecs2.1493.Quantifying decadal-scale erosion rates and their short-term variability on ecological sites in a semi-arid environment
                                                        

- (Peer Reviewed Journal)Polyakov, V., Nearing, M.A., Stone, J., Holifield Collins, C.D., Nichols, M.H. 2015. Quantifying decadal-scale erosion rates and their short-term variability on ecological sites in a semi-arid environment. Catena. 137:501-507. https://doi.org/10.1016/j.catena.2015.10.023.Early results of the Soil Moisture Active Passive Validation Experiment (SMAPVEX15)

- (Abstract Only)Cosh, M.H., Jackson, T.J., Colliander, Andreas, Goodrich, D.C., Holifield Collins, C., McKee, L.G., Kim, S., Yueh, S. 2016. Early results of the Soil Moisture Active Passive Validation Experiment (SMAPVEX15). American Geophysical Union Fall Meeting. December 14-18, 2015, San Francisco, CA. Abstract # H54B-07.Scaling an in situ network for high resolution modeling during SMAPVEX15

- (Abstract Only)Coopersmith, E., Cosh, M.H., Jacobs, J., Jackson, T.J., Crow, W.T., Holifield-Collins, C., Goodrich, D.C., Colliander, A. 2016. Scaling an in situ network for high resolution modeling during SMAPVEX15. American Geophysical Union Fall Meeting, December 14-18, 2015, San Francisco, CA. Abstract # H51I-1506.Development of an integrated multi-platform approach for assessing brush management conservation efforts in semiarid rangelands
                                                        

- (Peer Reviewed Journal)Holifield Collins, C.D., Kautz, M., Ponce-Campos, G., Hottenstein, J., Metz, L. 2015. Development of an integrated multi-platform approach for assessing brush management conservation efforts in semiarid rangelands. Journal of Applied Remote Sensing (JARS). 9:1-15. https://doi.org/10.1117/1.JRS.9.096057.Runoff and sediment yield relationships with soil aggregate stability for a state-and-transition model in southeastern Arizona

- (Peer Reviewed Journal)Holifield Collins, C.D., Stone, J.J., Cratic Iii, L. 2015. Runoff and sediment yield relationships with soil aggregate stability for a state-and-transition model in southeastern Arizona. Journal of Arid Environments. 117:96-103.Using long-term datasets to study exotic plant invasions on rangelands in the western United States

- (Peer Reviewed Journal)Morris, C.E., Morris, L., Leffler, J.A., Holifield Collins, C.D., Forman, A.D., Weltz, M.A., Kitchen, S.G. 2013. Using long-term datasets to study exotic plant invasions on rangelands in the western United States. Journal of Arid Environments. 95:65-74.A geomorphic perspective on terrain-modulated organization of vegetation productivity:  Analysis in two semiarid grassland ecosystems in Southwestern United States

- (Peer Reviewed Journal)Flores Cervantes, J., Istanbulluoglu, E., Vivoni, E., Holifield Collins, C.D., Bras, R. 2014. A geomorphic perspective on terrain-modulated organization of vegetation productivity:  Analysis in two semiarid grassland ecosystems in Southwestern United States. Ecohydrology. 7:242-257.Utilizing long-term ARS data to compare and contrast hydroclimatic trends from snow and rainfall dominated watersheds

- (Proceedings)Goodrich, D.C., Marks, D.G., Seyfried, M.S., Keefer, T.O., Unkrich, C.L., Anson, E.L., Clark, P., Flerchinger, G.N., Hamerlynck, E.P., Hardegree, S.P., Heilman, P., Holifield Collins, C.D., Moran, M.S., Nearing, M.A., Nichols, M.H., Pierson Jr, F.B., Scott, R.L., Stone, J.J., Van Vactor, S.S., Winstral, A.H., Wong, J.K. 2011. Utilizing long-term ARS data to compare and contrast hydroclimatic trends from snow and rainfall dominated watersheds.  Proceedings of the 4th Interagency Conference of Research in the Watersheds, Fairbanks, AK., Sept. 26-30, 2011.Runoff and erosional response to a drought-induced shift in a desert grassland community composition
                                                        

- (Peer Reviewed Journal)Polyakov, V.O., Nearing, M.A., Stone, J.J., Hamerlynck, E.P., Nichols, M.H., Holifield Collins, C.D., Scott, R.L. 2010. Runoff and erosional response to a drought-induced shift in a desert grassland community composition. Journal of Geophysical Research. 115, G04027. https://doi.org/10.1029/2010JG001386.Likelihood parameter estimation for calibrating a soil moisture using radar backscatter

- (Peer Reviewed Journal)Nearing, G.S., Moran, M.S., Thorp, K.R., Holifield Collins, C.D., Slack, D.C. 2010. Likelihood parameter estimation for calibrating a soil moisture using radar backscatter. Remote Sensing of Environment. 114: 2564-2574.Soil Evaporation Response to Lehmann Lovegrass (Eragrostis lehmanniana) Invasion in a Semiarid Watershed

- (Peer Reviewed Journal)Moran, M.S., Scott, R.L., Hamerlynck, E.P., Green, K.N., Emmerich, W.E., Holifield Collins, C.D. 2009. Soil Evaporation Response to Lehmann Lovegrass (Eragrostis lehmanniana) Invasion in a Semiarid Watershed.  Agricultural and Forest Meteorology.  149:2133-2142.Soil Evaporative Response to Lehmann Lovegrass Eragrostis lehmanniana Invasion in a Semiarid Watershed                                                                 1982

- (Proceedings)Vegetation Data, Walnut Gulch Experimental Watershed, Arizona, United States                                                            1855

- (Peer Reviewed Journal)Skirvin, S., Kidwell, M., Biedenbender, S.H., Henley, F.P., King, D.M., Holifield Collins, C.D., Moran, M.S., Weltz, M.A. 2008. Vegetation Data, Walnut Gulch Experimental Watershed, Arizona, United States.  Water Resources Research, Vol. 44, W05S08, doi:10.1029/2006WR005724.A Remote Sensing Approach for Estimating Distributed Daily Net Carbon Dioxide Flux in Semiarid Grasslands                                                               1878

- (Peer Reviewed Journal)Holifield Collins, C.D., Emmerich, W.E., Moran, M.S., Hernandez, M., Scott, R.L., Bryant, R., King, D., Verdugo, C.L. 2008. A remote sensing approach for estimating distributed daily net carbon dioxide flux in semiarid grasslands.  Water Resources Research, Vol. 44, W05S17, doi:10.1029/2006WR005699.Assessing Vegetation Change Temporally and Spatially in Southeastern Arizona                                                                   1882

- (Peer Reviewed Journal)King, D.M., Skirvin, S., Holifield Collins, C.D., Moran, M.S., Biedenbender, S., Kidwell, M., Weltz, M.A., Diaz-Gutierrez, A. 2008. Assessing Vegetation Change Temporally and Spatially in Southeastern Arizona. Water Resources Research,  Vol. 44, W05S15, doi:10.1029/2006WR005850.Appropriate scale of soil moisture retrieval from high-resolution radar imagery for bare and minimally vegetated soils                                                                 1859

- (Peer Reviewed Journal)Thoma, D., Moran, M.S., Bryant, R., Rahman, M., Holifield Collins, C.D., Keefer, T.O., Noriega, R., Osman, I., Skirvin, S., Tischler, M., Bosch, D.D., Starks, P.J., Peters-Lidard, C. 2008. Appropriate scale of soil moisture retrieval from high-resolution radar imagery for bare and minimally vegetated soils.  Remote Sensing of Environment.  112:403-414.Preface to special section on Fifty Years of Research and Data Collection: U.S. Department of Agriculture Walnut Gulch Experimental Watershed                                                                   1930

- (Peer Reviewed Journal)Moran, M.S., Emmerich, W.E., Goodrich, D.C., Heilman, P., Holifield Collins, C.D., Keefer, T.O., Nearing, M.A., Nichols, M.H., Renard, K.G., Scott, R.L., Smith, J.R., Stone, J.J., Unkrich, C.L., Wong, J.K. 2008. Preface to special section on Fifty Years of Research and Data Collection: U.S. Department of Agriculture Walnut Gulch Experimental Watershed.  Water Resources Research, Vol. 44, W05S01, doi:10.1029/2007WR006083.Long-term remote sensing database, Walnut Gulch Experimental Watershed, Arizona, United States                                                                  1854

- (Peer Reviewed Journal)Moran, M.S., Holifield Collins, C.D., Goodrich, D.C., Qi, J., Shannon, D.T., Olsson, A. 2008. Long-term remote sensing database, Walnut Gulch Experimental Watershed, Arizona, United States.  Water Resources Research. Vol. 44, W05S10, doi:10.1029/2006WR005689.A DERIVATION OF ROUGHNESS CORRELATION LENGTH FOR PARAMETERIZING RADAR BACKSCATTER MODELS                                                                  1703

- (Peer Reviewed Journal)Rahman, M.M., Moran, M.S., Thoma, D., Bryant, R., Sano, E.E., Holifield Collins, C.D., Skirvin, S.M., Kerschner, C., Orr, B. 2007. A derivation of roughness correlation length for parameterizing radar backscatter models.  International J. of Remote Sensing.  1-18.MAPPING SURFACE ROUGHNESS AND SOIL MOISTURE USING MULTI-ANGLE RADAR IMAGERY WITHOUT ANCILLARY DATA                                                               1832

- (Peer Reviewed Journal)Rahman, M.M., Moran, M.S., Thoma, D.P., Bryant, R., Holifield Collins, C.D., Jackson, T.J., Orr, B.J., Tischler, M. 2008. Mapping surface roughness and soil moisture using multi-angle radar imagery without ancillary data.   Remote Sensing of Environment.  112:391-402.MEASURING SURFACE ROUGHNESS HEIGHT TO PARAMETERIZE RADAR BACKSCATTER MODELS FOR RETRIEVAL OF SURFACE SOIL MOISTURE                                                               1704

- (Peer Reviewed Journal)Bryant, R., Moran, M.S., Thoma, D., Holifield Collins, C.D., Skirvin, S.M., Rahman, M., Slocum, K., Starks, P.J., Bosch, D.D., Gonzalez-Dugo, M.P. 2007. Measuring surface roughness height to parameterize radar backscatter models for retrieval of surface soil moisture.  IEEE  Geosci. and Rem. Sens. Letters 4(1): 137-141.COMPARISON OF FOUR MODELS FOR DETERMINING SURFACE SOIL MOISTURE FROM C-BAND RADAR IMAGERY                                                                 1702

- (Peer Reviewed Journal)Thoma, D., Moran, M.S., Bryant, R., Rahman, M.M., Holifield Collins, C.D., Skirvin, S.M., Sano, E.E., Slocum, K. 2005. Comparison of four models for determining surface soil moisture from c-band radar imagery. Water Resources Research 42(1): 1-12.COMPARISON OF TWO METHODS FOR EXTRACTING SURFACE SOIL MOISTURE FROM C-BAND RADAR IMAGERY                                                                1634

- (Proceedings)Thoma, D., Moran, M.S., Bryant, R., Rahman, M., Holifield Collins, C.D., Skirvin, S.M. 2004. Comparison of two methods for extracting surface soil moisture from c-band radar imagery.Proc. Internat'l. Geosci. and Rem. Sens. Sym., Sept. 20-24, Anchorage, AK, 4 p.MAPPING DAILY NET CO2 FLUX FROM GRASSLANDS USING REMOTE SENSING                                                                1539

- (Abstract Only)AGU Winter Meeting, San Fransisco, CA., Abstracts, unpaginated.EVALUATION OF HYPERSPECTRAL, INFRARED TEMPERATURE AND RADAR MEASUREMENTS FOR MONITORING SURFACE SOIL MOISTURE                                                  1517

- (Proceedings)Bryant, R., Thoma, D., Moran, M.S., Holifield, C.D., Goodrich, D.C., Keefer, T.O., Paige, G., Williamd, D., Skirvin, S.M. 2003. Evaluation of hyperspectral, infrared temperature and radar measurements for monitoring surface soil moisture.  Proceedings First Interagency Conference on Research in the Watersheds.  Oct. 27-30, 2003, Benson, AZ., pp. 528-533.ESTIMATING REGIONAL DAYTIME NET CARBON DIOXIDE FLUX USING REMOTELY SENSED INSTANTANEOUS MEASUREMENTS                                                 1516

- (Proceedings)Holifield, C.D., Emmerich, W.E., Moran, M.S., Bryant, R., Verdugo, C.L. 2003. Estimating regional daytime net carbon dioxide flux using remotely sensed instantaneous measurements.  Proceedings First Interagency Conference on Research in the Watersheds.  Oct. 27-30, 2003, Benson, AZ., pp. 517-521.EVALUATION OF HYPERSPECTRAL, INFRARED TEMPERATURE AND RADAR MEASUREMENTS FOR MONITORING SURFACE SOIL MOISTURE                                                                   1517

- (Proceedings)Proc. 1st Interagency Conf. on Research in the Watersheds, Oct. 27-30, 2003, Benson,AZ., pp. 528-523.DATA CONTINUITY OF EARTH OBSERVING-1 (EO-1) ADVANCED LAND IMAGER (ALI) AND LANDSAT TM AND ETM+                                                                   1640

- (Peer Reviewed Journal)Bryant, R.B., Moran, M.S., Mcelroy, S.A., Holifield, C.D., Thome, K.J., Miura, T., Biggar, S.F. 2003. Data continuity of earth observing-1 (eo-1) advanced land imager (ali) and landsat tm and etm+. IEEE Transactions on Geoscience and Remote Sensing. 41:1204-1214.A REMOTE SENSING APPROACH FOR ESTIMATING REGIONAL GRASSLAND CARBON DIOXIDE FLUX                                                            1485

- (Proceedings)Proc. EPA Conf. on Spectral Remote Sensing of Vegetation, March 12-14, 2003, Las Vegas, NV, Unpaginated CD Rom.A REFINED EMPIRICAL LINE APPROACH FOR RETRIEVING SURFACE REFLECTANCE FROM EO-1 ALI IMAGES                                                              1465

- (Peer Reviewed Journal)Moran, M.S., Bryant, R., Holifield Collins, C.D., Mcelroy, S. 2003. A refined empirical line approach for retrieving surface reflectance from EO-1 ali images.  Rem. Sens. Env. 78:71-82.TEMPORAL AND SPATIAL CHANGES IN GRASSLAND TRANSPIRATION DETECTED USING LANDSAT AND ETM+ IMAGERY                                                         1440

- (Peer Reviewed Journal)Holifield Collins, C.D., Mcelroy, S., Moran, M.S., Bryant, R., Miura, T., Emmerich, W.E. 2003. Temporal and spatial changes in grassland transpiration detected using landsat and etm+ imagery.  Can. J. Rem. Sens. 29(2):259-270.TEMPORAL AND SPATIAL CHANGES IN GRASSLAND TRANSPIRATION DETECTED USING LANDSAT IMAGERY                                                          1439

- (Proceedings)Holifield, C.D., Mcelroy, S., Moran, M.S., Bryant, R., Miura, T., Gao, X., Huete, A. 2002. Temporal and spatial changes in grassland transpiration detected using landsat imagery.  International Society Remote Sensing of Environment. p. 495-497.


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