Model for Pesticide Spill in Louisville using GLEAMS Natsuko Shiomi.

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Presentation transcript:

Model for Pesticide Spill in Louisville using GLEAMS Natsuko Shiomi

Overview  Define a problem  Model Description  Input data  Output data  Sensitive Analysis  Conclusion

Define a problem (Case Study)  In Louisville, KY, there was a pesticide spill  Diazinon  Nearly 1000gal spilled  As much as 500gal was cleaned up  Find out how much time does it take to remove all the pesticide???

How does GLEAMS work?  Continuous simulation  Field scale model  Developed extension of the chemicals, Runoff and Erosion from CREAMS  Assumes -homogeneous land use, soil, and precipitation.

How does GLEAMS work? cont…

Input data  Precipitation  Hydrology (soil information)  Weather (temperature)  Erosion  Pesticide  Nutrient  Time

Output data  Precipitation  Weather (temperature)  Erosion  Pesticide  Nutrient

Sensitive Analysis  Both Application rate and timing is highly sensitive  Soil type and root zone are also sensitive

Conclusion As root zone increases, the total pesticide loss decreases. If the pesticide spill occur one day before rain storm in summer, total loss does not increase much, however if it is in winter it increases by about 3.4 times. Changing in spill date does not affect to its detention time.

Thank you Questions or Comments?