| Abstract: | A mass balance model was developed and applied to the Sacramento River in northern California during the July 1991 Sacramento River metam-sodium spill. The transport and reactions of metam-sodium, a soil fumigant, and the volatile and toxic methyl isothiocyanate (MITC) were simulated during the two-and-a-half days of movement along a 68-km stretch of river. Results from modeling were compared with field data for MITC, which is the only product measured downriver after the spill. Agreement between the simulated and measured values of MITC concentrations were found at Doney Creek (65.9 km downstream). Results illuminated the complexities and unique characteristics associated with the multiple kinetic processes of the chemical plume in the river. In particular, the photolysis of metam-sodium followed zero-order kinetics for high concentrations and first-order kinetics for low concentrations, a unique phenomenon consistent with the finding reported in a laboratory study. Concentrations of metam-sodium for transition from zero- to first-order, obtained by calibration and model sensitivity analyses, were in the same range as those in the reported laboratory results. ??ASCE. |
| Genre: | Article |
| ProdID: | 70019854 |
| Citation Author: | Wang, P. F.; Mill, T.; Martin, J. L.; Wool, T. A. |
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| Citation End Page: | 712 |
| Citation Issue: | 7 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Environmental Engineering |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Fate and transport of metam spill in Sacramento river; 1997; Article; Journal; Journal of Environmental Engineering; Wang, P. F.; Mill, T.; Martin, J. L.; Wool, T. A. |
| Citation Start Page: | 704 |
| Citation Volume: | 123 |
| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Fate and transport of metam spill in Sacramento river; 1997; Article; Journal; Journal of Environmental Engineering; Wang, P. F.; Mill, T.; Martin, J. L.; Wool, T. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1997 00:00 -0600 |
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