Hydrogeological Survey and Compilation of Hydro-Geological Map in Central Flow Basin, Taiwan

Chiang, Li-Wei

doi:10.1130/abs/2016am-276876

Cited by 3 publications

(6 citation statements)

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“…The subsidence rate of the boundary gradually increased over time, whereas the shape of the boundary remained constant, indicating that the boundary reflected the composition of subsurface sediments. According to Central Geological Survey, Ministry of Economic Affairs report [12], the sediments in the study area, from east to west, consisted of gravel, sand, and mud. When groundwater is pumped, the compaction of mud is greater than that of sand and gravel.…”

Section: Discussionmentioning

confidence: 99%

“…Four aquifers merge at the top of the alluvial fan. Figure 3 depicts a hydrogeological model of the Jhuoshuei River alluvial fan and clearly shows that the aquifers and aquitards are formed by marine transgression and regression [12]. …”

Section: Study Areamentioning

confidence: 99%

“…The Jhuoshuei River alluvial fan is composed of unconsolidated sediments, mainly gravel, sand, and mud, which are transported by the Jhuoshuei, Lugang, and Huwei Rivers from the Pleistocene Toukoshan Formation in the east part of the alluvial fan. The sediment deposits in the Jhuoshuei River alluvial fan are the result of frequent flooding that has led to the formation of large-grain-size material, including gravel and coarse-grained sand, constituting an overlapping, layered distribution [12].…”

Section: Study Areamentioning

confidence: 99%

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Observing Land Subsidence and Revealing the Factors That Influence It Using a Multi-Sensor Approach in Yunlin County, Taiwan

Hsu

Chang²,

Chang

et al. 2015

Remote Sensing

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Land subsidence is a worldwide problem that is typically caused by human activities, primarily the removal of groundwater. In Western Taiwan, groundwater has been pumped for industrial, residential, agricultural, and aquacultural uses for over 40 years. In this study, a multisensor monitoring system comprising GPS stations, leveling surveys, monitoring wells, and Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) was employed to monitor land subsidence in Western Taiwan. The results indicate that land subsidence in Yunlin County was mainly affected by the compaction of subsurface soils and over-pumping of groundwater from deep soils. The study area comprised western foothills, characterized by sediments containing predominantly gravel, and coastal areas, where clay was predominant. The subsidence in coastal areas was more severe than that in the western foothills, as a result of groundwater removal. An additional factor affecting subsidence was the compaction of deep layers caused by deep groundwater OPEN ACCESSRemote Sens. 2015, 7 8203 removal and the deep-layer compaction was difficult to recover. Based on multisensor monitoring results, severe subsidence is mainly affected by compaction of subsurface soils, over-pumping of groundwater from deep soils, and deep soil compaction.

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Section: Discussionmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

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Observing Land Subsidence and Revealing the Factors That Influence It Using a Multi-Sensor Approach in Yunlin County, Taiwan

Hsu

Chang²,

Chang

et al. 2015

Remote Sensing

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“…1a). The central mountain ranges reach altitudes above 3500 m in several massifs and are built up of pre-Miocene to Pliocene metamorphic rocks (Chang, 1953(Chang, , 1955aHo, 1988). Their western fringes are called the Western Foothills (WF) (Angelier et al, 1986;Ho, 1988).…”

Section: The Taiwanese Tablelandsmentioning

confidence: 99%

“…1b). It has caused the topographic separation of the tableland segments and the coastal plains (Chang, 1990(Chang, , 1994Ho, 1994;Lee, 2000); the precise chronology of the movement is still unclear due to a lack of direct dating results.…”

Section: Geomorphological and Sedimentological Setting Of The Miaoli ...mentioning

confidence: 99%

Late Quaternary formation of the Miaoli Tableland in northwest Taiwan, an interplay of tectonic uplift and fluvial processes dated by OSL

et al. 2022

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The “tablelands” in Taiwan are sedimentary terraces occurring in the foreland basin west of the Neogene mountain ranges. The Miaoli Tableland consists of elevated Late Quaternary sedimentary successions, representing a change from tidal to coastal and fluvial to eolian depositional environments. The present-day morphology is a result of combined processes, including differential tectonic uplift, ongoing fluvial aggradation, and incision. Selected deposits in 10 outcrops were sampled and studied by optical dating. The deposition of fluvial sediments started after the last interglacial (<100 ka) in the southeast of the tablelands. Uplift and sea-level lowering caused a base-level fall, resulting in a stepwise redeposition of the fluvial sediments. Additionally, enhanced remobilization of fluvial sediments occurred during the cold/dry climate during Marine Oxygen Isotope Stages (MIS) 4 and 2. The depositional ages of the coastal sediments enabled the estimation of long-term uplift rates of ca. 0.5 to 3.5 mm/yr. The eolian cover sediments yielded MIS 3 (east) to Holocene ages (west). Our results provide new insight into the interplay of climate, sea-level changes, remobilization of sediments, and tectonism leading to tableland formation during the Late Quaternary.

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Patent Tigers: The New Geography of Global Innovation

Barnett¹

2016

SSRN Journal

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Hydrogeological Survey and Compilation of Hydro-Geological Map in Central Flow Basin, Taiwan

Cited by 3 publications

References 0 publications

Observing Land Subsidence and Revealing the Factors That Influence It Using a Multi-Sensor Approach in Yunlin County, Taiwan

Observing Land Subsidence and Revealing the Factors That Influence It Using a Multi-Sensor Approach in Yunlin County, Taiwan

Late Quaternary formation of the Miaoli Tableland in northwest Taiwan, an interplay of tectonic uplift and fluvial processes dated by OSL

Patent Tigers: The New Geography of Global Innovation

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