Simulating concentration of bensulphuron-methyl in a drainage canal of a paddy block using a rice pesticide model

Thai Khanh Phong, Kazuaki Hiramatsu, Hirozumi Watanabe

Research output: Contribution to journalArticle

4 Citations (Scopus)

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 languageEnglish
Pages (from-to)69-81
Number of pages13
JournalEnvironmental Technology
Volume32
Issue number1
DOIs
Publication statusPublished - Jan 1 2011

Fingerprint

Canals
Pesticides
Drainage
canal
rice
pesticide
drainage
Runoff
runoff
pesticide application
Herbicides
paddy field
Catchments
field survey
Sensitivity analysis
sensitivity analysis
herbicide
water budget
river basin
Rivers

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Water Science and Technology
  • Waste Management and Disposal

Cite this

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 journalArticle

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