Abstract
Recent concerns about the presence of pesticide residues in surface and groundwater
have resulted in a need for computer model simulation to assess the impacts of agrichemicals
on potential surface and groundwater contamination. GLEAMS (Groundwater Loading
Effects of Agricultural Management Systems), is a mathematical model developed for fieldsize areas to evaluate the effects of agricultural management systems on the movement
of agrichemicals. It can be used as a tool to evaluate the effects of different tillage
systems on pesticide, and nutrient losses.
Agriculture is being increasingly criticized for the deterioration of surface and subsurface
water resources all over the world. In the Balochistan province of Pakistan, almost
all the urban and rural population depend on groundwater resources for drinking water,
irrigation, and the water for livestock use. The objective of this study was to simulate
pesticide (Metolachlor) losses from conventional tillage and no-till systems using the
GLEAMS pesticide submodel. The pesticide submodel simulated results showed that
the runoff losses of Metolachlor from convectional tillage were
94%, and by sediment, the losses were 92% higher than that for the no-till system. However, the
percolation losses of Metolachlor were 61%, and the total Metolachlor losses were 39% higher
from no-till system as compared to conventional tillage system. The total Metolachlor losses were
higher for no-till system because 91 to 99% of the annual total no-till losses were by percolation
as compared to 41 to 90% for conventional tillage.
Maqsood Ahmed Khan, Ehsanullah Kakar, Dost Muhammad Baloch, Salah Ud Din Azad. (2011) GLEAMS COMPUTER MODEL PESTICIDE PREDICTION IN TWO SOILS, Journal of Applied and Emerging Sciences, Volume 2, Issue 1.
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