Thus, to prevent further underflooding and soil salinization concrete lining of the canal invert and banks or other measures to decrease percolating water losses are required.
32.
However, irrigation can also be used, together with soil drainage, to overcome soil salinization by leaching excess salts from the vicinity of the root zone.
33.
Salinization of the Euphrates River has occurred due to ancient Mesopotamian irrigation, and detrimental amounts of zinc have been deposited in the New Caliber River of Nigeria.
34.
Over-exploitation caused a steady decline in irrigation due to " droughts, sedimentation, aggradation of the main channel, salinization, seepage and waterlogging ".
35.
For irrigation systems to be sustainable, they require proper management ( to avoid salinization ) and must not use more water from their source than is naturally replenishable.
36.
These conditions persist due to inefficient agricultural irrigation and cattle grazing practices, which have led to the salinization of soil and the removal of ground cover plants respectively.
37.
The closed reservoirs of the Kuma-Manych depression are nowadays over-mineralized which results in soil salinization of the adjacent areas and appearance of unusable agricultural areas.
38.
Such losses are attributable not only to soil erosion, but also to salinization, loss of nutrients and organic matter, acidification, compaction, water logging and subsidence.
39.
This is an axis which probably reflects at the same time the phenomenon of salinization affecting certain types of soils and an alkalinization that develop on other [ 10 ].
40.
Rising sea levels also would increase the hazard of storm surges, the salinization of farm land and erosion of the coastline, said researcher Du Bilan, who lead the study.
