Estimation of quantitative spatial and temporal distribution for groundwater storage in agricultural basin of Korea: implications for rational water use

Raza, Maimoona; Lee, Jin Yong

doi:10.1007/s12665-019-8179-2

Cited by 4 publications

(4 citation statements)

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“…7 showed an increase in groundwater level value (groundwater deepening) across the studied period. Deepening of the groundwater level from 2011 to 2014, is attributed to a gradual increase in groundwater abstraction majorly for agricultural activities in Haean basin, which resulted in observable drop of average groundwater level (Raza et al, 2019). Decreasing groundwater NO 3 in this study, found to have negative correlation with the increasing groundwater level from the soil surface, because fertilizer application mostly effect the shallow groundwater (Pociene and Pocius, 2005).…”

Section: Varying Hydrochemistrymentioning

confidence: 51%

Factors affecting spatial pattern of groundwater hydrochemical variables and nitrate in agricultural region of Korea

Lee¹

2019

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The overuse of fertilizers for high yields in agricultural production increases the leaching problem particularly in areas affected by heavy monsoon precipitations in Republic of Korea. The extent of leaching depends on various factors such as rate of monsoon precipitation, agricultural management practices, land use, soil properties, topographic features, and hydrochemistry. We studied spatial variations based on temporal fluctuations of groundwater level below the ground surface, pH, electrical conductivity (EC), and nitrate (NO 3) from year 2011 to 2014 in 70 groundwater wells in agricultural region of Korea. We found that groundwater level deepening across the studied period in agricultural area. Low pH (5.50-6.50) gradually vanished in year 2014 and high pH (8.51-9.50) appeared in the same year. Variations in the EC values shifted from high range EC (>500 µS/cm) to lower range (<100 µS/cm) from 2011 to 2014. Similar to spatial pattern of groundwater EC and contrary to pH, the high values (>50 mg/L) for groundwater NO 3 which appeared in the start of the study period, got vanished at the end of the study period. These findings are attributed to improved agricultural practices and change in land use pattern from vegetables to orchards and ginseng fields which do not require excessive fertilizer application.

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Section: Varying Hydrochemistrymentioning

confidence: 51%

Factors affecting spatial pattern of groundwater hydrochemical variables and nitrate in agricultural region of Korea

Lee¹

2019

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“…In Equations (6) and (7), Q med indicate data trend direction and its value denotes the magnitude of the trend. Sen's slope is robust estimation for the magnitude of trend and has been broadly used in identifying the slope of trend in hydrological time series [34,35].…”

Section: Data Collection and Analysismentioning

confidence: 99%

“…This increasing variable and extreme precipitation are making the country more susceptible to flood and drought hazards [4,5]. To deal with frequent droughts, there is a need to construct dams to store water in the summer, but there is no more suitable sites left for the construction of mega dams in the country [6,7]. Water demand is increasing with growing agricultural innovation and urban sprawl, and an alternative to groundwater is needed.…”

Section: Introductionmentioning

confidence: 99%

“…The major use of groundwater is for agricultural (51.2%) and domestic (39%) purposes [9]. In addition, practice of using groundwater as bottled drinking water (enforced by Korean Drinking Water Management Act) has increased the use of groundwater by 11% per year, from 2000 to 2015 [5,6]. In recent decades, less precipitation in the dry season and increasing groundwater use has caused a decrease in the groundwater level [10].…”

Section: Introductionmentioning

confidence: 99%

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Countrywide Groundwater Quality Trend and Suitability for Use in Key Sectors of Korea

Jeon

Raza

Lee

et al. 2020

Water

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Under changing climate, increasing groundwater use has risen the concern for groundwater quality variations over recent years, to maintain a healthy ecosystem. The objectives were to identify trend of temporal variations in groundwater quality and its suitability for different uses in Republic of Korea. Water quality data were collected from 198 monitoring stations of Groundwater Quality Monitoring Network (GQMN), annually for the period of ten years (2008–2017). Non-parametric trend analysis of a Mann–Kendall test and Theil–Sen’s slope was done on groundwater physico-chemical data of ten years. Groundwater suitability evaluation was done for use in main sectors including domestic (drinking) and agriculture (irrigation). For drinking suitability analysis, results were compared with World Health Organization (WHO) and Korean Ministry of Environment (KME) established guidelines. For irrigation suitability evaluation, electrical conductivity (EC), Sodium Adsorption Ratio (SAR), percent of Na+, Residual Sodium Carbonate (RSC), US Salinity Laboratory (USSL), and Wilcox diagram were used. Most significantly, water type belongs to Ca-HCO3 and Ca-SO4 types, but a small proportion belongs to Na-CO3 and Na-Cl types. Approximately, 96% and 93% of groundwater samples are suitable for drinking, based on WHO and KME guidelines, respectively. Around 98% and 83% of groundwater samples are in suitable range for irrigation use, based on USSL and Wilcox diagrams, respectively.

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Relationship between Agricultural Land Use and Spatial Heterogeneity in Quality of Water Resources in Haean Basin of Korea

Raza

Lee

2022

Water Resour

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Estimation of quantitative spatial and temporal distribution for groundwater storage in agricultural basin of Korea: implications for rational water use

Cited by 4 publications

References 45 publications

Factors affecting spatial pattern of groundwater hydrochemical variables and nitrate in agricultural region of Korea

Factors affecting spatial pattern of groundwater hydrochemical variables and nitrate in agricultural region of Korea

Countrywide Groundwater Quality Trend and Suitability for Use in Key Sectors of Korea

Relationship between Agricultural Land Use and Spatial Heterogeneity in Quality of Water Resources in Haean Basin of Korea

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