The role of different sources of uncertainty on the stochastic quantification of subsurface discharges in heterogeneous aquifers

Schiavo, Massimiliano

doi:10.1016/j.jhydrol.2022.128930

Cited by 15 publications

(1 citation statement)

References 34 publications

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“…To address this, the precipitation before and after the turbidity can be analyzed, and a scenario in which precipitation is as usual can be set up to simulate groundwater levels. Although there are sophisticated analysis methods using the Monte Carlo framework [39], in this study, the contributions of turbidity and precipitation were calculated using the following formulae, incorporating cases without turbidity effects and cases with neither turbidity effects nor normal precipitation levels: Turbidity Contribution = 1/NΣ(Hcase(a),i − Ho,i)/(Hcase(b),i − Ho,i) × 100 (4)…”

Section: Contribution Estimationmentioning

confidence: 99%

Impacts of High-Concentration Turbid Water on the Groundwater Environment of the Tedori River Alluvial Fan in Japan

Fujihara,

Otani,

Takase

et al. 2024

Water

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The occurrence of high-concentration turbid water due to a large landslide in the upper reaches of the Tedori River Basin in Japan in May 2015 led to a rapid decline in the groundwater levels within the alluvial fan. However, factors other than turbid water, such as changes in precipitation patterns, can have a significant impact on groundwater levels but have not been thoroughly investigated. By analyzing the relationship between river water and groundwater levels, we found that by 2018, conditions had returned to those observed prior to the turbidity events. Regarding seepage, we found that approximately 24% of the Tedori River’s discharge contributed to seepage before the turbidity event. In contrast, during the post-turbidity years, seepage decreased between 2015 and 2017 and returned to the pre-turbidity levels by 2018. Furthermore, by constructing a hydrological model and examining the contributions of turbidity and precipitation, we found that in 2015, turbidity contributed to 76% of the groundwater level changes, whereas precipitation accounted for 24%. In contrast, in 2016, turbidity contributed to 67%, while precipitation contributed to 33%. In essence, the first year was characterized by a significant contribution from turbidity, while precipitation also played a significant role in groundwater level fluctuations in the second year.

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Section: Contribution Estimationmentioning

confidence: 99%