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The level of ground water nitrate pollution pdd becoming a serious problem. These urgent preventative actions should be adopted in order to combine agricultural productivity and durability with water economy and water quality preservation.

Revue des sciences de l’eau15 2— Download the article in PDF to read it.

Pollution nitrique des eaux souterraines au Tadla Maroc. Some programs are in progress within this souterarines. Pollution, ground water, nitrate, soil physical and chemical characteristics, agricultural practices, urban pollution. It covers a surface area of km 2. The irrigation water comes from the Oum Erbia river, the Bin Downlooad Ouidane souherraines and from two important waters tables: The objectives are essentially to reduce nitrate excess and to introduce more efficient irrigation techniques such as the pivot frontal ramp recommended for cereals and sugar beet, and localized irrigation system proposed for vegetable crops and arboriculture.

The Oum Erbia river km long divides this plain into two large irrigated areas Beni Amir in the east ha and Beni Moussa in the south hawith different hydrological characteristics.

However, other observations including: Also, since the Oum Erbia river basin has also been subjected to a clean-up of urban and industrial pollution, it would be interesting to carry out a more precise study of nitrogen dynamics and nitrate leaching at the plot scale, especially for the most common practiced crops in the region wheat, sugar beet and vegetable crops.

The plain of Tadla is situated in the centre of Morocco, in the Oum Erbia river basin. This could be due to the homogeneity of the physical environment and to the movement pdt water in the saturated soil, in the direction of ground water flow, inducing the accumulation of nitrate pollution in the hydraulic downstream area of the water table.

This has generated a health risk in rural areas, since most of the rural population get their drinking water supply from the downloaf. The present study was carried out in the Tadla region. This will allow the prediction of nitrate leaching losses and identify, through scenario analysis, the links that should be acted on, in order to reduce the risk of ground water nitrate pollution in this region.

Pollution Des Eaux

This would advance the understanding and management of nitrogen cycles in the crop-water-soil system. The objectives of this study were to quantify the degree of ground water contamination by nitrates ldf to identify the potential causes of this pollution.

These practices may be responsible for nitrate leaching beyond the root zone during the cropping season and may generate large quantities of residual inorganic nitrogen at harvest time. The diffuse nitrate pollution has dse attributed to land use, irrigation and fertilization practices.

Pollution Des Eaux

In Morocco, diffuse ground water pollution by nitrates in irrigated areas has caused an increase in the risk of water quality deterioration. This represents a potential risk of nitrate ground water pollution in the next draining period. In attempts to avoid this situation, many important measures at the regional scale are necessary, in order to rationalize agricultural soutrraines and to increase the farmers’ awareness of ground water nitrate pollution.

However, no correlation souterraiines found between ground water nitrate contents and linear combinations of physical environmental variables. Considering the degree of agriculture in this area, the situation could worsen rapidly, thus inducing significant ground water deterioration.

The physical environment and agricultural practices were determined either by field measurements, laboratory analyses or by investigations with farmers at 40 selected sites. The results are presented souterrqines thematic maps using a geographical information system. This high mineralization capacity, which is characteristic of irrigated Mediterranean areas, could be partly responsible for this pollution.

Switch to classic view. Revue des sciences de l’eau 15, no. The monitoring of nitrate concentrations in ground water was carried out during the period of August to Aprilin wells in the region of study.

Finally, the database included as part of this study may be integrated in a water and nitrate movement simulation model. West Beni Moussa was generally not as polluted as east Beni Moussa, but an increase in ground water nitrate levels was observed in some downstream wells in west Beni Moussa.