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Synthetic Unit Hydrograph of Small Catchments by Using GIS

100%

Günal A., Güven A.

Acta Physica Polonica A

2016

vol. 130

issue 1

130-132

In this study, synthetic unit hydrograph parameters which are q_{p}, t_{p}, t_{b} are calculated by using Synder, Mockus, SCS (Soil Conservation Service) and DSI (State Hydraulic Works) methods. First according to observed data, calculations were done. Then the mentioned above methods, which are based on both topographic map and geographic information systems values, were applied. Three catchments, Damlıca, Vize, Kumdere were studied. Synder, Mockus, SCS and DSI methods were applied for each catchment.

The Cryogenic Enrichment System in Chromatographic Analysis of Noble Gases in Groundwater

80%

Najman J., Śliwka I.

Acta Physica Polonica A

2016

vol. 130

issue 3

737-742

The concentration of helium in groundwater may be a good environmental tracer for groundwater dating in hydrogeology. In this work, we present a chromatographic method for simultaneous analysis of helium, neon, and argon in groundwater from a single groundwater sample. Proper use of environmental tracers for dating purposes requires the knowledge of the recharge temperature of the system and the excess air. Both parameters can be determined by measuring the concentration of argon and neon in groundwater. The lowest helium concentration in groundwater is 4.8×10¯⁸ cm³_{STP}/g_{H₂O} at sea level and temperature 10°C. In view of the deficiency of a suitable detector with a limit of detection for helium at the level of 4.8×10¯⁸ cm³_{STP}/g_{H₂O}, the application of the enrichment method is necessary. In this work, the cryogenic method of enrichment with activated charcoal at abated pressure conditions was applied. Helium, neon and argon are analyzed on two gas chromatographs equipped with capillary and packed columns (filled with molecular sieve 5A and activated charcoal) and three thermo-conductive detectors. The chromatographic method was applied to groundwater dating from Kraków and Żarnowiec aquifers. The levels of detection for measurement systems for the tested compounds are: 1.9×10¯⁸ cm³_{STP}/cm³ for neon, 3.1×10¯⁶ cm³_{STP}/cm³ for argon, and 1.2×10¯⁸ cm³_{STP}/cm³ for helium.

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2 Acta Physica Polonica A

2 2016

1 Günal A.

1 Güven A.

1 Najman J.

1 Śliwka I.

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Synthetic Unit Hydrograph of Small Catchments by Using GIS

The Cryogenic Enrichment System in Chromatographic Analysis of Noble Gases in Groundwater