期刊
WATER RESEARCH
卷 38, 期 13, 页码 3017-3022出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2004.02.013
关键词
pesticide; runoff; paddy field; fate; field survey
Runoff characteristics of nine kinds of herbicides from paddy fields were surveyed in the Kozakura. River, that is one of the tributaries flowing into the Lake of Kasumigaura, over a period of 23 April to 30 June (before and after rice transplantation) of year. The flow rates of river water and the concentrations of herbicides in the river water were measured every day in May and every 2 days in April and June at six survey sites along the river. The runoff characteristics of herbicides were elucidated by taking account of the rainfall data, the detailed application data (application date and quantities of herbicides applied to each paddy field in a region), and their physico-chemical properties. The runoff rates (the runoff/application amounts ratio) were calculated for each herbicide, resulting in the range of 8.2-22.4%. The runoff rates were correlated fairly well with octanol-water partition coefficient, log P-ow, rather than with water. solubility of herbicides. (C) 2004 Published by Elsevier Ltd.
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