Tritium Concentrations and Radiocarbon Ages of Gushing Groundwater from Hsuehshan Tunnel, Northern Taiwan

Liu, Tsung-Kwei; Chen, Cheng-Hong; Yang, Tsanyao Frank; Liu, Ming

doi:10.3319/tao.2005.16.4.909(gig)

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…28 transverse walking tunnels, eight vehicle tunnels, and shafts and air vents (including three ventilation stations, three ventilation repeaters, 12 transverse ventilation tunnels, and six airshafts) comprise the exhaust system of the two main tunnels. The Hsuehshan Tunnel boasts the largest group of dual-bore highway tunnels in the World, and its construction cost 640 million USD [ 13 ].…”

Section: Methodsmentioning

confidence: 99%

The Effect of Developing a Tunnel across a Highway on the Water Quality in an Upstream Reservoir Watershed Area—A Case Study of the Hsuehshan Tunnel in Taiwan

Shyu

Cheng

Fang

2012

IJERPH

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Cities in Taiwan are so dependent on reservoir water that preservation of the upstream reservoir watershed has become a significant public concern. However, due to the high-density development of land, resulting in rapid urban expansion, the construction of tunnels and elevated highways across reservoirs to better utilize the surrounding land has become a global trend. Based on data from long-term observation of the reservoir, this study verifies the difference in water quality before and after the highway construction. The results indicate that the total phosphorus (TP) increased on average 14 μg/L to 36.5 μg/L per annum, and the water quality is expected to require 10 years to recover. During the highway development, the average TP was more than twice the normal level. During summer, the TP level increases 3.1-fold due to rainfall. As indicated by the results, the large-scale land development will harm the long-term preservation of the reservoir’s water quality, and therefore should be avoided.

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Section: Methodsmentioning

confidence: 99%

The Effect of Developing a Tunnel across a Highway on the Water Quality in an Upstream Reservoir Watershed Area—A Case Study of the Hsuehshan Tunnel in Taiwan

Shyu

Cheng

Fang

2012

IJERPH

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“…Hsueshan Tunnel construction at the catchment lasted for over 16 years (1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006) of artesian water, which was proven to have existed for 8000 years (Liu et al, 2005), indicated that it contained underground reservoirs. Certain amounts of tunnel drilling debris as well as a large quantity of groundwater were exported into the downstream reservoir.…”

Section: Site Descriptionmentioning

confidence: 98%

Geochemistry of Sediment Phosphorus Impacted by High Calcium Export from the Catchments: A Case Study

Chen

2007

Environmental Engineering Science

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This study examined sediment phosphorus (P) geochemistry in the Feitsui Reservoir, Taiwan, during a period when groundwater outbursts carrying Ca exports occurred during tunnel construction at the catchments. In order to evaluate the impact of such events on P release from reservoir sediments, chemical fractionations of P along with the concerned metals, Al, Fe, Mn, and Ca in sediments, catchment top soils, and tunnel drilling debris were performed. The chemical composition of porewater (mixed 10-cm sediment layer) was analyzed on soluble P, soluble metals (Fe, Mn, Al, Ca), sulfide, and fluoride. A diagenesis simulation was conducted. It was concluded that oversaturation of porewater P and the formation of Fe, Mn, and Ca bound P minerals accumulated in sediments, which were originally dominated by Al bound P. This suggests that the Ca exports had impacted P geochemistry, resulting in suppressed P mobility.

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“…In addition, such gas-charged sediments in the seafloor and their bubbling plumes present a high risk to offshore construction. Liu et al (2005), investigating gushing water during the Hsuehshan Tunnel construction in northern Taiwan, measure carbon and tritium isotopic compositions and recognize two different recharge sources for the gushing groundwater. Such isotopic compositions reflect local hydrogeological characteristics of the rock formations along the tunnel and are helpful in assessing excavation methods.…”

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confidence: 99%

Preface to the Special Issue on Geochemical Investigations on Geohazards

Yang¹,

Chen²,

Liu³

2005

Terr. Atmos. Ocean. Sci.

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Tritium Concentrations and Radiocarbon Ages of Gushing Groundwater from Hsuehshan Tunnel, Northern Taiwan

Abstract: ABSTRACT1 Department of Geosciences, National Taiwan University, Taipei, Taiwan, ROC

Cited by 9 publications

References 14 publications

The Effect of Developing a Tunnel across a Highway on the Water Quality in an Upstream Reservoir Watershed Area—A Case Study of the Hsuehshan Tunnel in Taiwan

The Effect of Developing a Tunnel across a Highway on the Water Quality in an Upstream Reservoir Watershed Area—A Case Study of the Hsuehshan Tunnel in Taiwan

Geochemistry of Sediment Phosphorus Impacted by High Calcium Export from the Catchments: A Case Study

Preface to the Special Issue on Geochemical Investigations on Geohazards

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