Abstract
A pesticide fate and transport model (PCPF-B) was developed to predict the runoff of pesticides from paddy plots to a drainage canal in a paddy block based on the plot scale model (PCPF-1). The block-scale model now comprises three modules: (1) a module for pesticide application, (2) a module for pesticide behaviour in paddy fields, and (3) a module for pesticide concentration in the drainage canal. The PCPF-B model was first evaluated using published data in a single plot and then was applied to predict the concentration of bensulphuron-methyl in one paddy block in the Sakura river basin, Ibaraki, Japan, where a detailed field survey was conducted. The PCPF-B model simulated well the concentration of bensulphuron-methyl in individual paddy plots. It also reflected the runoff pattern of bensulphuron-methyl at the block outlet, although overestimation of bensulphuron-methyl concentrations occurred due to uncertainty in water balance estimation. A sensitivity analysis showed that the soil adsorption coefficient of the herbicide had the greatest influence on the concentrations and cumulative loss of bensulphuron-methyl to the drainage canal.
| Original language | English |
|---|---|
| Pages (from-to) | 69-81 |
| Number of pages | 13 |
| Journal | Environmental Technology |
| Volume | 32 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 1 2011 |
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All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Water Science and Technology
- Waste Management and Disposal
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Simulating concentration of bensulphuron-methyl in a drainage canal of a paddy block using a rice pesticide model. / Phong, Thai Khanh; Hiramatsu, Kazuaki; Watanabe, Hirozumi.
In: Environmental Technology, Vol. 32, No. 1, 01.01.2011, p. 69-81.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Simulating concentration of bensulphuron-methyl in a drainage canal of a paddy block using a rice pesticide model
AU - Phong, Thai Khanh
AU - Hiramatsu, Kazuaki
AU - Watanabe, Hirozumi
PY - 2011/1/1
Y1 - 2011/1/1
N2 - A pesticide fate and transport model (PCPF-B) was developed to predict the runoff of pesticides from paddy plots to a drainage canal in a paddy block based on the plot scale model (PCPF-1). The block-scale model now comprises three modules: (1) a module for pesticide application, (2) a module for pesticide behaviour in paddy fields, and (3) a module for pesticide concentration in the drainage canal. The PCPF-B model was first evaluated using published data in a single plot and then was applied to predict the concentration of bensulphuron-methyl in one paddy block in the Sakura river basin, Ibaraki, Japan, where a detailed field survey was conducted. The PCPF-B model simulated well the concentration of bensulphuron-methyl in individual paddy plots. It also reflected the runoff pattern of bensulphuron-methyl at the block outlet, although overestimation of bensulphuron-methyl concentrations occurred due to uncertainty in water balance estimation. A sensitivity analysis showed that the soil adsorption coefficient of the herbicide had the greatest influence on the concentrations and cumulative loss of bensulphuron-methyl to the drainage canal.
AB - A pesticide fate and transport model (PCPF-B) was developed to predict the runoff of pesticides from paddy plots to a drainage canal in a paddy block based on the plot scale model (PCPF-1). The block-scale model now comprises three modules: (1) a module for pesticide application, (2) a module for pesticide behaviour in paddy fields, and (3) a module for pesticide concentration in the drainage canal. The PCPF-B model was first evaluated using published data in a single plot and then was applied to predict the concentration of bensulphuron-methyl in one paddy block in the Sakura river basin, Ibaraki, Japan, where a detailed field survey was conducted. The PCPF-B model simulated well the concentration of bensulphuron-methyl in individual paddy plots. It also reflected the runoff pattern of bensulphuron-methyl at the block outlet, although overestimation of bensulphuron-methyl concentrations occurred due to uncertainty in water balance estimation. A sensitivity analysis showed that the soil adsorption coefficient of the herbicide had the greatest influence on the concentrations and cumulative loss of bensulphuron-methyl to the drainage canal.
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U2 - 10.1080/09593330.2010.486844
DO - 10.1080/09593330.2010.486844
M3 - Article
VL - 32
SP - 69
EP - 81
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
SN - 0959-3330
IS - 1
ER -