This paper aims to mitigate the impacts of subsurface drainage system in Ibshan, Egypt on the environment. For studying
and analyzing these impacts, data are collected concerning before and after the installation of the subsurface drainage system. The
environmental impacts are set to be crops yields, salinity, and water table depth. Concerning crops yields, five crops are identified to
study the effect of the subsurface drainage system on their productivity. Regarding salinity, the saline areas are investigated pre and
post the subsurface drainage system. For the water table depth, the ground water table depths are reviewed before and after the
subsurface drainage system. Also, the DRAINMOD-S computer program is employed to determine the effect of the subsurface
drainage system on the water table depth. It is concluded that the environmental impacts of the subsurface drainage system in Ibshan
area are very good. The yields of five crops increased from 7% to 38%, 16.4% of saline areas are improved, and the ground water
table depth is reduced by 10%. Also, an equation is obtained to predict the percentage decrease of ground water table depth according
to the laterals spacing of the subsurface drainage system. |
