TY - JOUR
T1 - Atrazine movement in corn cultivated soil using HYDRUS-2D
T2 - A comparison between real and simulated data
AU - Alves de Oliveira, Luciano
AU - Jarbas Honorio de, Miranda
AU - Grecco, Katarina L.
AU - Tornisielo, Valdemar Luiz
AU - Woodbury, Bryan L.
N1 - This study was supported in part by the National Council for Scientific and Technological Development ( CNPq ) for granting scholarships to the first author and by the PQ grants.
The authors would like to thank the team of the Laboratory of Soil Physics of the Department of Biosystems Engineering, Luiz de Queiroz College of Agriculture (ESALQ/USP) and to the São Paulo Research Foundation (FAPESP) for the financial support (Proposals: #2017/07443-6 , #2018/01915-6 and #2018/10164-4 ) and Meat Animal Research Center USMARC/USDA, Clay Center, NE, USA.
This study was supported in part by the National Council for Scientific and Technological Development (CNPq) for granting scholarships to the first author and by the PQ grants. The authors would like to thank the team of the Laboratory of Soil Physics of the Department of Biosystems Engineering, Luiz de Queiroz College of Agriculture (ESALQ/USP) and to the S?o Paulo Research Foundation (FAPESP) for the financial support (Proposals:#2017/07443-6, #2018/01915-6 and #2018/10164-4) and Meat Animal Research Center USMARC/USDA, Clay Center, NE, USA. Mention of trade names or commercial products in this article is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the USDA. USDA is an equal opportunity provider and employer.
PY - 2019/10/15
Y1 - 2019/10/15
N2 - Atrazine is an herbicide that is applied in corn around the world and in sugarcane in Brazil. It is known to be hazardous for animals' health, mobile in the soil, and its analysis is considered expensive and onerous. Solute movement studies are essential to provide information about dangerous molecules movement, which can avoid contamination. While field investigations demand time and financial resources, numerical models are an alternative to describe water and solute distribution in the soil profile. Thus, the objective of this work was to use HYDRUS 2-D model for simulations of atrazine movement in containers packed with tropical soil cultivated with corn and to compare simulated and observed data through statistical parameters. The research was carried out in a greenhouse during 116 days after planting. Atrazine was analyzed in the soil solution at three different depths to validate HYDRUS-2D. Simulations were carried out using hydraulic properties fitted directly to measured retention data and parameters for corn growing and atmospheric characteristics. The mixed procedure analysis indicated that there are differences in atrazine concentration among depths and along time. In general, atrazine concentration is higher at shallow depths and right after application. However, it is possible to find atrazine in deeper soil layers, which might be a concern regarding contamination. RMSE, Willmott and Pearson coefficients indicated a favorable capacity of the model to simulate atrazine concentration on corn cultivation. HYDRUS-2D is a reliable tool to obtain trends in atrazine movement under these experiment's conditions. The uptake parameters, the crop root growth and distribution parameters depend on further specific studies to better describe the relationship between the plant and atrazine and meteorological parameters need to be updated.
AB - Atrazine is an herbicide that is applied in corn around the world and in sugarcane in Brazil. It is known to be hazardous for animals' health, mobile in the soil, and its analysis is considered expensive and onerous. Solute movement studies are essential to provide information about dangerous molecules movement, which can avoid contamination. While field investigations demand time and financial resources, numerical models are an alternative to describe water and solute distribution in the soil profile. Thus, the objective of this work was to use HYDRUS 2-D model for simulations of atrazine movement in containers packed with tropical soil cultivated with corn and to compare simulated and observed data through statistical parameters. The research was carried out in a greenhouse during 116 days after planting. Atrazine was analyzed in the soil solution at three different depths to validate HYDRUS-2D. Simulations were carried out using hydraulic properties fitted directly to measured retention data and parameters for corn growing and atmospheric characteristics. The mixed procedure analysis indicated that there are differences in atrazine concentration among depths and along time. In general, atrazine concentration is higher at shallow depths and right after application. However, it is possible to find atrazine in deeper soil layers, which might be a concern regarding contamination. RMSE, Willmott and Pearson coefficients indicated a favorable capacity of the model to simulate atrazine concentration on corn cultivation. HYDRUS-2D is a reliable tool to obtain trends in atrazine movement under these experiment's conditions. The uptake parameters, the crop root growth and distribution parameters depend on further specific studies to better describe the relationship between the plant and atrazine and meteorological parameters need to be updated.
KW - Computational model
KW - Contamination
KW - Herbicide
KW - Soil dynamics
KW - Soil engineering
UR - https://www.scopus.com/pages/publications/85070193636
UR - https://www.scopus.com/pages/publications/85070193636#tab=citedBy
U2 - 10.1016/j.jenvman.2019.109311
DO - 10.1016/j.jenvman.2019.109311
M3 - Article
C2 - 31466177
AN - SCOPUS:85070193636
SN - 0301-4797
VL - 248
JO - Journal of Environmental Management
JF - Journal of Environmental Management
M1 - 109311
ER -