A Simulation Model for Predicting Pesticide Concentrations in Paddy Water and Surface Soil. I. Model Development
A Simulation Model for Predicting Pesticide Concentrations in Paddy Water and Surface Soil. I. Model Development
复制标题
预测稻田水和表土中农药浓度的模拟模型。
DOI：
10.1080/09593332208618167
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发表时间：
2000
影响因子：
2.8
通讯作者：
K. Takagi
中科院分区：
文献类型：
--
作者：
H. Watanabe;K. Takagi
建立了稻田水和表层土壤中农药浓度的模拟预测模型（PCPF-1）。PCPF-1模型模拟了农药在稻田水和1cm深的氧化性稻田表层土壤中的归趋和迁移。该模型考虑了农药在稻田水环境中的迁移和归宿过程，包括农药在稻田水舱中的溶解、农药从PSL中解吸的迁移、降水和灌溉对农药的稀释、蒸发和蒸腾对农药的浓缩以及农药在稻田水环境中的生化和光化学降解对农药的耗散。在PSL室中，考虑了农药在土壤中的吸附、通过稻田水的渗滤而迁移以及通过生化降解而消散。模型程序采用Visual Basic for Applications作为Microsoft Excel中的宏进行编码，其中包括稻田水的日水量平衡和日UV-B辐射数据表。利用1988年在日本茨木国立农业环境科学研究所（NIAES）试验稻田获得的每日水分平衡和UV-B辐射的田间数据进行了模型行为和敏感性分析。稻田水和PSL中的模拟农药浓度随时间呈指数下降。PCPF-1成功地模拟了稻田水中农药浓度的振荡，受灌溉和降水的突然稀释以及PSL中农药迁移的影响。PCPF-1有可能成为调查农药转归和迁移过程的工具。同时将讨论使用实验数据的模型验证。
A simulation model for predicting pesticide concentrations in paddy water and surface soil (PCPF-1) was developed. The PCPF-1 model simulates the fate and transport of pesticide in paddy water and 1cm deep oxidative paddy surface soil layer, or the pesticide source layer (PSL). The model considers the pesticide fate and transport processes in paddy water such as dissolution of pesticide in paddy water compartment, pesticide transfer by desorption from the PSL, dilution by precipitation and irrigation, concentration from evaporation and transpiration, and dissipation by biochemical and photochemical degradation. In the PSL compartment, adsorption in soil, pesticide transport though percolation of paddy water, and pesticide dissipation by biochemical degradation are considered. The model program was coded using Visual Basic for Applications as a Macro in Microsoft Excel that includes data sheets of daily water balance and daily UV-B radiation received on paddy water. The model behavior and sensitivity analysis was conducted by using field data of daily water balance and UV-B radiation obtained at the experimental paddy rice field at National Institute of Agro-Environmental Sciences (NIAES), Ibaraki, Japan in 1988. Simulated pesticide concentrations in paddy water and PSL decreased exponentially with time. PCPF-1 successfully simulated oscillating pesticide concentrations in paddy water that affected by abrupt dilution from irrigation and precipitation and pesticide transfer from PSL. PCPF-1 indicated potentials to be a tool for investigating the pesticide fate and transport processes. The model validation using experimental data will be discussed in the concurrent paper.