Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/74296
DC FieldValue
dc.titlePesticide runoff from paddy field and its impact on receiving water
dc.contributor.authorLi, S.
dc.contributor.authorMigita, J.
dc.date.accessioned2014-06-19T05:51:15Z
dc.date.available2014-06-19T05:51:15Z
dc.date.issued1992
dc.identifier.citationLi, S.,Migita, J. (1992). Pesticide runoff from paddy field and its impact on receiving water. Water Science and Technology 26 (12) : 69-76. ScholarBank@NUS Repository.
dc.identifier.issn02731223
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/74296
dc.description.abstractA mathematical model is developed to predict the runoff of pesticides from paddy field to a river. The model describes the long term runoff as a function of physical-chemical properties of pesticides, cultural practices and climatic conditions. It is assumed that the adsorption and desorption of pesticides between soil and water phases are in equilibrium state, while the degradation in water and soil and the evaporation from water to atmosphere are of first-order reaction. The model is used to examine the relationships between the seasonal amounts of pesticide runoff and their environmental dynamic factors. A four-stage evaluation system is proposed to assess the impact of the runoff on drinking water by taking into account the amount of application, runoff ratio, toxicity and the possibility of being removed from raw water by water purification processes. The model simulates the daily variation of contaminant level in river water, thereby providing a basis for making recommendations for pesticide usage and water management for rice cultivation.
dc.sourceScopus
dc.typeConference Paper
dc.contributor.departmentCIVIL ENGINEERING
dc.description.sourcetitleWater Science and Technology
dc.description.volume26
dc.description.issue12
dc.description.page69-76
dc.description.codenWSTED
dc.identifier.isiutNOT_IN_WOS
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