Improvement and application of the PCPF-1@SWAT2012 model for predicting pesticide transport: a case study of the Sakura River watershed
Improvement and application of the PCPF-1@SWAT2012 model for predicting pesticide transport: a case study of the Sakura River watershed
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PCPF-1@SWAT2012农药迁移预测模型的改进与应用——以樱花川流域为例
DOI：
10.1002/ps.4934
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发表时间：
2018
影响因子：
4.1
通讯作者：
Ishwar Chandra Yadav and Hirozumi Watanabe
中科院分区：
文献类型：
--
作者：
3.Le Hoang Tu;Julien Boulange;Takashi Iwafune;Ishwar Chandra Yadav and Hirozumi Watanabe
土壤和水评估工具结合稻田农药浓度（PCPF‐1@SWAT）模型是为了模拟水稻农药在流域中的归趋和迁移而开发的。然而，目前的模型在表征稻田面积方面存在不足，并且与ArcSWAT 2012程序不兼容。在这项研究中，我们修改了原来的PCPF-1@SWAT模型，开发了一个新的PCPF-1@SWAT 2012模型，以解决水稻区的不足，并利用ArcSWAT 2012程序。将该模型应用于日本茨木樱川流域，模拟了苯噻草胺、丙草胺、苄嘧磺隆和咪唑磺隆4种除草剂的迁移过程。结果表明，PCPF 1@SWAT 2012模拟的水流流速与实测数据基本一致。计算的Nash-Sutcliffe效率系数（NSE）（0.73）和百分比偏差（PBIAS）（-20.38）表明该模型具有令人满意的性能。此外，PCPF-1@SWAT 2012模型模拟的除草剂浓度与实测值吻合较好。统计指标NSE和均方根误差（RMSE）估计苯噻草胺（分别为0.69和0.18）、丙草胺（分别为0.86和0.18）、苄嘧磺隆（分别为0.46和0.21）和咪唑磺隆（0.64和0.28，结论PCPF-1@ SWAT 2012模型能够较好地模拟该流域的水流速度和除草剂的迁移，包括不同的土地利用类型，包括水稻区。© 2018化学工业协会
BACKGROUNDThe Soil and Water Assessment Tool combined with Pesticide Concentration in Paddy Field (PCPF‐1@SWAT) model was previously developed to simulate the fate and transport of rice pesticides in watersheds. However, the current model is deficient in characterizing the rice paddy area and is incompatible with the ArcSWAT2012 program. In this study, we modified the original PCPF‐1@SWAT model to develop a new PCPF‐1@SWAT2012 model to address the deficiency in the rice paddy area and utilizing the ArcSWAT2012 program. Next, the new model was applied to the Sakura River watershed, Ibaraki, Japan in order to simulate the transport of four herbicides: mefenacet, pretilachlor, bensulfuron‐methyl and imazosulfuron.RESULTSThe results showed that the water flow rate simulated by PCPF1@SWAT2012 was similar with the observed data. The calculated Nash–Sutcliffe efficiency coefficient (NSE) (0.73) and percent bias (PBIAS) (–20.38) suggested satisfactory performance of the model. In addition, the concentrations of herbicides simulated by the PCPF‐1@SWAT2012 model were in good agreement with the observed data. The statistical indices NSE and root mean square error (RMSE) estimated for mefenacet (0.69 and 0.18, respectively), pretilachlor (0.86 and 0.18, respectively), bensulfuronmethyl (0.46 and 0.21, respectively) and imazosulfuron (0.64 and 0.28, respectively) indicated satisfactory predictions.CONCLUSIONThe PCPF‐1@SWAT2012 model is capable of simulating well the water flow rate and transport of herbicides in this watershed, comprising different land use types, including a rice paddy area. © 2018 Society of Chemical Industry