Hyun A Lee

• Doctor of Philosophy
• Researcher at Yonsei University

The M9.0 earthquake occurred at 05:46:23 UTC on March 11, 2011 off the coast of Tohoku, Japan, causing devastating tsunami-driven disasters along coastal areas. The influence of the Tohoku earthquake was detected at 46 of 320 monitoring wells of the Korea National Groundwater Monitoring Network (NGMN) in terms of changes in water level, temperature...

Closing energy and water budgets in terrestrial ecosystems still remains as a challenge, particularly for those with heterogeneous vegetation in complex terrains. This paper presents an attempt to quantitatively estimate parts of water-level fluctuation due to evapotranspiration (ET) and earth tides, and their seasonality at the Gwangneung forest c...

Groundwater is important for domestic, industrial, and agricultural uses in Ho Chi Minh City, Vietnam. As the city has developed in a coastal environment, the issue of the fresh water supply must be solved for continuous development. The aim of this study was to quantitatively estimate the risk of groundwater salinization in the Ho Chi Minh area du...

This study assessed the status of fluorine (F) in soil in the vicinity of a spillage of anhydrous hydrofluoric acid in Korea. Gaseous hydrogen fluoride dispersed was suspected to have contaminated the surrounding soil environment. Total and water soluble F concentrations in soil within a 1km radius of the spillage were determined. Total F concentra...

Seawater intrusion (SWI) is a critical issue for coastal aquifers, especially in islands where groundwater is the sole source of water supply. The objective of this study was to develop a straightforward approach to evaluating groundwater vulnerability to SWI, using a statistical method with spatial analyses applied to the four basins of Jeju volca...

Although there is skepticism about the likelihood of predictive success, research on the prediction of an earthquake through precursory changes in natural parameters, including groundwater, has continued for decades. One of the promising precursors is the changes in groundwater, i.e., the level and composition of groundwater, and the monitoring net...

An Mw 5.5 earthquake occurred in Pohang, South Korea on November 15, 2017, resulting in a great impact on society. Despite a lot of controversy about the cause of the earthquake in relation to the enhanced geothermal system (EGS), the location of earthquakerelated active faults is poorly known. Here, we first report the results of the geochemical a...

Significant variation in the precipitation events caused by global climate change has made it difficult to manage water resources due to the increased frequency of unexpected droughts and floods. Under these conditions, groundwater is needed to ensure a sustainable water supply; thus, estimates of precipitation recharge are essential. In this study...

CO2 leakage monitoring is essential to ensure the environmental safety for CO2 capture and storage (CCS) technologies. This study aims to provide recommendations for the selection of analytical methods for monitoring of geochemical parameters at CCS sites. Five CCS sites are reviewed to investigate the changes in geochemistry following CO2 leakage....

The hydrofluoric acid (HF) leakage accident occurred on September 2012 in Gumi, Korea affected the surrounding soils and plants. In this study, we investigated fluoride migration in Gumi area through geochemical properties of soil-liquid phase (pore water F and water-soluble F). The concentrations of porewater F and water-soluble F were obtained fr...

Various leaching tests were applied to the soil affected by accidental leakage of HF in an industrial area in Korea. Three different leaching methods including pH-stat, continuous batch leaching, and column tests were adopted to assess leaching characteristics and mobility of fluorine(F) in soil and the potential risks to ecosystem. Both natural an...

To establish an aging management plan considering seawater influx and changes in groundwater within nuclear power plant sites, the characteristics of groundwater flow must be understood. This study investigated the characteristics of groundwater flow within the site and analyzed groundwater level recorded by monitoring wells to evaluate groundwater...

Groundwater monitoring data from the National Groundwater Monitoring Stations, a total of 320 stations, were analyzed to identify the response of water level and quality to the Odaesan earthquake (M4.9) occurred in January 2007. Among the total of eight stations responded to the earthquake, five wells showed water-level decline, and in three wells,...

In the Gwangneung forest, a Korean National Arboretum, fluxes of energy, water and CO2 have been monitored continuously over the forest catchment as a part of HydroKorea project. Using variograms, characteristic time scales of hydrologic parameters including precipitation, stream discharge, soil moisture and groundwater levels in response to the ra...