✦ LIBER ✦

A Field Test of Root Zone Water Quality Model-Pesticide and Bromide Behavior

✍ Scribed by Ahuja, Laj R.; Ma, Q. L.; Rojas, K. W.; Boesten, Jos J. T. I.; Farahani, H. J.

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 564 KB
Volume: 48
Category: Article
ISSN: 1526-498X
DOI: 10.1002/(sici)1096-9063(199610)48:2<101::aid-ps431>3.0.co;2-y

No coin nor oath required. For personal study only.

✦ Synopsis

The Root Zone Water Quality Model (RZWQM) is a process-based model developed recently by USDA-ARS scientists. The model integrates physical, chemical and biological processes to simulate the fate and movement of water and agrochemicals over and through the root zone at a representative point in a field with various management practices. The model was evaluated using field data for the movement of water and bromide, and the transformation and transport of cyanazine and metribuzin in the soil profile. The model reasonably simulated soil water and bromide movement. Pesticide persistence was predicted reasonably well using a two-site sorption model that assumes a rate-limited (i.e. long-term) adsorption-desorption process with the additional assumption of negligible degradation of inter-aggregate adsorbed pesticides.

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