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¿¬±¸º¸¹® : À¯±âÈÇÕ¹° ; Àΰø°¿ì¿Í ÄáÀç¹è Æ÷Àå ¶óÀ̽øÞŸ¸¦ ÀÌ¿ëÇÑ endosulfanÀÇ À¯Ãâ·® Æò°¡
Original Research Articles : Organic Compounds ; Runoff of Endosulfan by Rainfall Simulation and from Soybean-grown Field Lysimeter |
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±èÂù¼· ( Chan Sub Kim ) , ÀÌÈñµ¿ ( Hee Dong Lee ) , ÀÓ¾çºó ( Yang Bin Ihm ) , ÀÓ°ÇÀç ( Geon Jae Im ) |
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26±Ç, 4È£, ½ÃÀÛÂʼö 343ÂÊ, ÀüüÂʼö 8ÂÊ |
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Three different experiments were carried out to investigate the runoff and erosion losses of endosulfan from sloped-field by rainfall. The mobility of endosulfan and which phase it was transported by were examined in adsorption study, the influence of rainfall pattern and slope degree on the pesticide loss were evaluated in simulated rainfall study, and the pesticide losses from soybean-grown field comparing with bare soil were measured in field lysimeter study. Adsorption parameter (K) of endosulfan ranged from 77 to 131 by adsorption method and K values by the desorption method were higher than those by the adsorption method. By the SSLRC`s classification for pesticide mobility endosulfan was classified as non-mobile class (Koc>4,000). Runoff and erosion loss of endosulfan by three rainfall scenarios ranged from 3.4 to 5.6% and from 4.4 to 15.6% of the amount treated. Endosulfan residues were mainly remained at the top 5 cm of soil depth after the simulated rainfall study. Pesticide loss in case of 30%-slope degree ranged from 0.6 to 0.9 times higher than those in case of 10%-slope degree. The difference of pesticide runoff loss was related with its concentration in runoff water and the difference of pesticide erosion loss would related closely with the quantity of soil eroded. Endosulfan losses from a series of lysimeter plots in sloped land by rainfall ranged from 5 to 35% of the amount treated. The erosion rate of endosulfan from soybean-plots was 66% of that from bare soil plots. The effect of slope conditions was not great for runoff loss, but was great for erosion loss as increasing to maximum 4~12 times with slope degree and slope length. The peak runoff concentration of endosulfan in soybean-plots and bare soil plots ranged from 8 to 10 and from 7 to 9 §¶L-1 on nine plots with different slope degree and slope length. Therefore the difference of the peak runoff concentrations between bare soil plots and soybean-plots were not great.
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