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| Simulation of Pesticide Transportation with a Distributed Non-point Pesticide Pollution Model |
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| KeyWord:distributed non-point source pollution model; isofenphos methyl; transportation; Linyi catchment |
| Author Name | Affiliation | | LIU Rui-juan | School of Geosciences, China University of Petroleum, Qingdao 266555, China | | ZHANG Yan-hong | College of Geo Exploration Science and Technology Jilin University, Changchun 130026, China |
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| Download times: 2017 |
| Abstract: |
| An increasing number of researchers have been studying pesticide pollution remained in the cultivated fields using the distributed non-point source pesticide model. On the basis of a distributed non-point source pesticide pollution model ESSI-2, this paper studied the process of pesticide transportation in Linyi catchment. Taking Isofenphos methyl as a simulated pesticide, and a reasonable pesticide concentration as an assumption, the ESSI-2 model was calibrated based on the acceptance level of the simulation results. The spatial distribution of pesticide transportation was analyzed by making use of the output of pesticide loading capacity. Study results are drawn as follows：（1）The distributed non-point source pollution model is a preferred tool to simulated the process of pesticide transportation in term of simulation precision and operational practicality. （２）The spatial distribution of pesticide was highly related to the different stages of its transportation. In the initial stage of pesticide spray in the cultivated fields, the spatial distribution of pesticides is primarily determined by the amount of pesticide usage in various locations. As time elapses, surface water flow palys a more important role in the spatial distribution and transportation of pesticide, resulting in the pesticides conflux to the stream course gradually and then to the downstream watershed. This simulated result provides an important basis for not only studies on water resource management in general, but also further research on pesticide transportation in particular. |
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