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A hydrochemical and Dye-tracing Investigation in the Posht-e-Naz Karstic Aquifer,Alburz mountain,Northern Iran

Journal of mountain Science 2011年第1期8卷 37-45页

作者： Kalantari N. Alizadeh B. mohammadi A.r. keshavarzi.m.r. Geology Department Shahid Chamran University Waterresource Organization

A hydrochemical and tracer study （uranine injection） was conducted in Jurassic limestone of the Posht-e-Naz area in the Alborz belt to evaluate hydraulic relations between a large diameter （about 100m） sinkhole and springs and aquifer parameters. A main goal of the project was to find out the source of turbidity of the Emarate drinking water supply spring （SP4） in rainy season. Springs discharge were measured and hydrochemical investigation were carried out. The uranine tracer was injected and eight springs, three wells and the Neka river were selected and totally 989 samples in 107 days were collected. Hydrochemical data demonstrated a relative connection between sinkhole （Shl） and spring （SP4）. The results of the tracing by sampling water indicated only a hydraulic connection between Sange- Nou spring （SP8） and injection point, while the charcoal packets analysis revealed tracer exits from spring numbers SP1, SP3, SP4, SP5, SP8, in wells W1 and W2, and in the Neka river. The concentration - time curves of charcoal packets for qualitative analysis and exit tracer for quantitative analysis is also assessed.

关键词： Posht-e-Naz Tracing Spring Sinkhole Charcoal packet

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Water resource management in the Intermountain Izeh Plain,Southwest of Iran

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Journal of mountain Science 2009年第1期6卷 25-41页

作者： Kalantari.N Pawar.N.J keshavarzi.m.r Geology Department Shahid Chamran UniversityAhvazIran Geology Department University of PunePune-411 007India

Ever growing demand for water for agricultural activities in the Izeh Plain has enhanced the use of groundwater. Due to enormous groundwater abstraction since 1985, the overall static water level has receded by more than 5 meters reflecting that the aquifer is under stress condition. As a result, interest is focused on application of artificial recharge as an option for groundwater management to augment water supply in this area. Therefore, in the present investigations, suitable sites for artificial recharge were selected by an integrated surface and sub-surface assessment of the area. On the basis of the data collected from four target points, it was realized that the selected sites for artificial recharge could not meet water demand of the area. In this study attention was also paid to utilization of the existing miangran Lake water as an alternative to combat water shortage for irrigation. The study further indicated that the available miangran Lake water could be used for irrigation of the reclaimed agricultural land and enabling to convert 20o0 hectares of rain-fed land into irrigation. The total cost to utilize lake water is US$ 2,756,729 and it was estimated that the project could recoup the investment within 5 years which is quite reasonable in this water scarcity prone area.

关键词： Artificial recharge stream miangranLake groundwater Izeh Plain

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基于模型的迭代重建算法在小儿全身CT扫描辐射剂量及影像质量的效果研究

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国际医学放射学杂志 2014年第2期 177-177页

作者： E.A.Smith J.r.Dillman m.m.Goodsitt E.G.Christodoulou N.keshavarzi P.J.Strouse 余晓 Department of radiology C.SMott Children 's Hospital -University of Michigan Health System 1540 E Hospital DrSPC 4252 Ann Arbor MI 48109-4252

目的回顾性比较基于模型的迭代重建算法(mBIr)的低剂量CT扫描和使用30%适应性统计迭代重建算法(ASIr)滤过反投影技术的标准剂量CT扫描之间的影

关键词：迭代重建算法影像质量辐射剂量 CT 基于模型小儿

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