The Seventh sector is located on the right bank of the Euphrates River at the town of ALbu- Kamal, the Syrian-Iraq border. Invest most heavily sector too, by planting different crops which irrigated by irrigation networks consisting of canals and ear
then trenches. Research aims to evaluate the salinity of agricultural soils and unconfined groundwater by doing field surveying of agricultural soils of horizons from ground surface till depth 200cm. and making detailed chemical analysis of free groundwater and evaluate the quality of it to determine the salinity regions and the salinity degree. The salinity of agricultural soils of the sector are sulfate-chlorine and little degree chlorine - sulfate and chlorine classified non salinity –little salinity and little degree moderate salinity to very highly and highly salinity. The salinity of free groundwater between 1.3-28.5 g/l. and classified chlorine sulfate-magnesia calcic and sometimes sulfate chlorine- calcic magnesia. The research recommend to study and determine the leachingrequirement of salinity regions from actual test or choosing the most appropriate experimental equations.
The third sector of lower Euphrates basin has a great economic importance, but some
lands have gone out of service because of salinization due to the rise of groundwater levels.
Thus, it is very important to solve the ground water issue using new s
cientific techniques.
This research aims to solve the drainage problem in the third sector using a scenario based
on a mathematical model, the results of which allow us design a proper drainage network
comprised of 111 wells scattered all over the study area, with a total abstraction of 269000
m3/day. This will lower the groundwater level, dry the swamps, and decrease the soil
salinity, ensuring a sustainable economic exploitation of agricultural lands.
تأثير نوعية مياه الري وبعض محسنات التربة في خواص التربة وإنتاجية محاصيل العلف في ظروف حوض الفرات الأدنى
The provision of adequate drainage and the accompanying problem of
accumulation of salt in soil have plagued irrigated agriculture for
centuries. Soil salinity is one of the major problems in arid and semi-arid
zones. In Euphrates valley the high
groundwater level and its high
evaporation rate caused a serious salinity problem. This study was aimed
to allocate the dangerous areas in terms of high water level resulted from
the recent and expected activities. Drainage wells will be drilled at these
areas in order to lower the groundwater level and prevent further soil
salinity.