Analysis of underground water resources quality in order to optimized management of water resources (Case Study: Khansar watershed)

Document Type : Original Article

Authors

1 M.Sc. of Watershed Management, Faculty of Natural Resources of Yazd University

2 Associate Professor, Faculty of Natural Resources of Yazd University,Yazd, Iran

3 Professor, Faculty of Natural Resources of Yazd University

4 Agricultural and natural resources research and Education center

Abstract

underground water resources are one of main sources for human needs, especially in dry areas. In addition, groundwater will not be affected by short-term droughts, and if used correctly can be a reliable resource for human needs. Khansar watershed, located in south- western of Harat city (in Yazd province), has two qanates with 414,383 m3 average annual discharge  and 5 Springs with 507,729.6 m3 average annual discharge. For evaluation of water quality, in this area,  no information is available so, in 2011, number of samples were taken and chemical analysis were carried on. The results showed that the input areas of Khansar watershed have high and appropriate water quality and are mainly Bicarbonat type. By moving the water toward the output, due to passing mineral geological formations, the water quality degrade. Minimum and maximum electrical conductivity  are 445 and 3866  µm/cm, respectively. The major cation, based on abundance,  are Sodium, Magnesium and Calcium. Analysis of the water quality for agriculture, on wilcox diagram, shows the suitability of all water samples except 4 and 6. These two samples are in the C4-S2 class and  are unsuitable for farming,  but appropriate for livestock. These results  have strategic importance in decisions, for developing  these areas.

Keywords

References

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Irrigation and Water Engineering
Volume 5, Issue 4 - Serial Number 20
September 2015
Pages 97-106

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