Pesticide transport simulation in a tropical catchment by SWAT
| Autor: | Joachim Ingwersen, M.A. Bannwarth, Marc Lamers, Thilo Streck, Alan D. Ziegler, Walaya Sangchan, C. Hugenschmidt |
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| Rok vydání: | 2013 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category Chlorothalonil Agrochemical business.industry Health Toxicology and Mutagenesis Drainage basin General Medicine Sorption coefficient Pesticide Toxicology Thailand Pollution Southeast asia chemistry.chemical_compound chemistry Models Chemical Water Movements Environmental science Decay coefficient Computer Simulation Pesticides business Water Pollutants Chemical |
| Zdroj: | Environmental pollution (Barking, Essex : 1987). 191 |
| ISSN: | 1873-6424 |
| Popis: | The application of agrochemicals in Southeast Asia is increasing in rate, variety and toxicity with alarming speed. Understanding the behavior of these different contaminants within the environment require comprehensive monitoring programs as well as accurate simulations with hydrological models. We used the SWAT hydrological model to simulate the fate of three different pesticides, one of each usage type (herbicide, fungicide and insecticide) in a mountainous catchment in Northern Thailand. Three key parameters were identified: the sorption coefficient, the decay coefficient and the coefficient controlling pesticide percolation. We yielded satisfactory results simulating pesticide load dynamics during the calibration period (NSE: 0.92–0.67); the results during the validation period were also acceptable (NSE: 0.61–0.28). The results of this study are an important step in understanding the modeling behavior of these pesticides in SWAT and will help to identify thresholds of worst-case scenarios in order to assess the risk for the environment. |
| Databáze: | OpenAIRE |
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