INVESTIGATION OF THE EFFECTIVE FACTORS IN THE SPATIAL VARIATIONS OF NITRATE CONCENTRATION IN THE GROUNDWATER OF GHRESO WATERSHED BASIN, GOLESTAN PROVINCE

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NASERI H.; RAGHIMI M.; YAKHKESHI M.E.; DEHGHAN H.; SHAH PASANDZADEH M.

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Journal: Journal of Agricultural Sciences and Natural Resources Year:2006 | Volume:13 | Issue:1 Page(s): 108-116

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Title

INVESTIGATION OF THE EFFECTIVE FACTORS IN THE SPATIAL VARIATIONS OF NITRATE CONCENTRATION IN THE GROUNDWATER OF GHRESO WATERSHED BASIN, GOLESTAN PROVINCE

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Keywords

NITRATEQ2

GROUNDWATER CONTAMINATIONQ3

ENVIRONMENTAL GEOLOGYQ3

GHRESO WATERSHED BASINQ2

GOLESTAN PROVINCEQ2

Abstract

The GHRESO WATERSHED BASIN with an area of about 1700 km2 is located in the southeastern part of Caspian Sea. The aquifers of this watershed with width of about 700 km2 consisted of the unconfined aquifers in the south and multiple unconfined to confined aquifers in the north and middle parts of the study area. Surface factors, which have threatened the contamination, especially high NITRATE concentration, of the aquifers, are consisted of shallow depth of ground water, intensive agricultural activities in the plain, burial of Gorgan municipal effluents and coarse-grain texture of the southern aquifers. In order to assess effects of these parameters as well as determine the sources of NITRATE pollution, sampling was carried out from 30 shallow and deep wells in two stages, pre-agricultural activity (may 2000) and post-agricultural activity (September 2000). According to the analytical results of collected samples from unconfined aquifers with depths of about 5 to 35 meter deep wells, which are drilled in confined aquifers, mean concentration of NITRATE in the wet and dry seasons fluctuate between 7.26-12.56 mg/l and 10.79-33.70 mg/l in the deep and shallow aquifers, respectively. These results indicate that the unconfined shallow aquifers are more susceptible to pollution than deep confined aquifers. Moreover, NITRATE concentration enrage between 10-67 mg/l in the Ziarat, Garmabdasht, and main branches of Ghreso rivers. So, this investigation manifests the agricultural activities and municipal wastewater along with surfacial runoff of the area play the most effective influences on the increasing of NITRATE concentration in the aquifer.

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نیترات از دیدگاه کشاورزی و محیط زیست

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APA: Copy

NASERI, H., RAGHIMI, M., YAKHKESHI, M.E., DEHGHAN, H., & SHAH PASANDZADEH, M.. (2006). INVESTIGATION OF THE EFFECTIVE FACTORS IN THE SPATIAL VARIATIONS OF NITRATE CONCENTRATION IN THE GROUNDWATER OF GHRESO WATERSHED BASIN, GOLESTAN PROVINCE. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, 13(1), 108-116. SID. https://sid.ir/paper/9491/en

Vancouver: Copy

NASERI H., RAGHIMI M., YAKHKESHI M.E., DEHGHAN H., SHAH PASANDZADEH M.. INVESTIGATION OF THE EFFECTIVE FACTORS IN THE SPATIAL VARIATIONS OF NITRATE CONCENTRATION IN THE GROUNDWATER OF GHRESO WATERSHED BASIN, GOLESTAN PROVINCE. JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES[Internet]. 2006;13(1):108-116. Available from: https://sid.ir/paper/9491/en

IEEE: Copy

H. NASERI, M. RAGHIMI, M.E. YAKHKESHI, H. DEHGHAN, and M. SHAH PASANDZADEH, “INVESTIGATION OF THE EFFECTIVE FACTORS IN THE SPATIAL VARIATIONS OF NITRATE CONCENTRATION IN THE GROUNDWATER OF GHRESO WATERSHED BASIN, GOLESTAN PROVINCE,” JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES, vol. 13, no. 1, pp. 108–116, 2006, [Online]. Available: https://sid.ir/paper/9491/en

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