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Author Kisi, O.; Liepelt, K.; Kulls, C.
Title (down) Discussion of “Improving Prediction Accuracy of Hydrologic Time Series by Least-Squares Support Vector Machine Using Decomposition Reconstruction and Swarm Intelligence” Type Journal Article
Year 2023 Publication Journal of Hydrologic Engineering Abbreviated Journal
Volume 28 Issue 4 Pages 07023001
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Publisher American Society of Civil Engineers Place of Publication Editor
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Call Number THL @ christoph.kuells @ kisi2023discussion Serial 220
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Author Priyanka*, B.N.; Mohan Kumar, M.S.
Title (down) Direct and inverse modeling of seawater intrusion: A Perspective Type Journal Article
Year 2017 Publication J. Geol. Soc. India Abbreviated Journal
Volume 90 Issue Pages 595-601
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Call Number CUT @ phaedon.kyriakidis @ Priyanka2017 Serial 152
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Author Yeh, M.; Lin, Y.; Chang, L.
Title (down) Designing an optimal multivariate geostatistical groundwater quality monitoring network using factorial kriging and genetic algorithms Type Journal Article
Year 2006 Publication Environ. Geol. Abbreviated Journal
Volume 50 Issue 1 Pages 101-121
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Publisher Springer Science and Business Media LLC Place of Publication Editor
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Call Number CUT @ phaedon.kyriakidis @ Yeh2006 Serial 144
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Author Han, D.; Currell, M.J.
Title (down) Delineating multiple salinization processes in a coastal plain aquifer, northern China: hydrochemical and isotopic evidence Type Journal Article
Year 2018 Publication Hydrology and Earth System Sciences Abbreviated Journal
Volume 22 Issue 6 Pages 3473-3491
Keywords Isotopes, China, multiple salinization
Abstract Groundwater is an important water resource for agricultural irrigation and urban and industrial utilization in the coastal regions of northern China. In the past 5 decades, coastal groundwater salinization in the Yang–Dai river plain has become increasingly serious under the influence of anthropogenic activities and climatic change. It is pivotal for the scientific management of coastal water resources to accurately understand groundwater salinization processes and their causative factors. Hydrochemical (major ion and trace element) and stable isotopic (δ18O and δ2H) analysis of different water bodies (surface water, groundwater, geothermal water and seawater) were conducted to improve understanding of groundwater salinization processes in the plain's Quaternary aquifer. Saltwater intrusion due to intensive groundwater pumping is a major process, either by vertical infiltration along riverbeds which convey saline surface water inland, and/or direct subsurface lateral inflow. Trends in salinity with depth indicate that the former may be more important than previously assumed. The proportion of seawater in groundwater is estimated to have reached up to 13 % in shallow groundwater of a local well field. End-member mixing calculations also indicate that the geothermal water with high total dissolved solids (up to 10.6 g L−1) with depleted stable isotope compositions and elevated strontium concentrations (> 10 mg L−1) also mixes locally with water in the overlying Quaternary aquifers. This is particularly evident in samples with elevated Sr ∕ Cl ratios (> 0.005 mass ratio). Deterioration of groundwater quality by salinization is also clearly exacerbated by anthropogenic pollution. Nitrate contamination via intrusion of heavily polluted marine water is evident locally (e.g., in the Zaoyuan well field); however, more widespread nitrate contamination due to other local sources such as fertilizers and/or domestic wastewater is evident on the basis of NO3 ∕ Cl ratios. This study provides an example of how multiple geochemical indicators can delineate different salinization processes and guide future water management practices in a densely populated water-stressed coastal region.
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Call Number THL @ christoph.kuells @ hess-22-3473-2018 Serial 81
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Author Varouchakis, E.A.; Theodoridou, P.G.; Karatzas, G.P.
Title (down) Decision-making tool for groundwater level spatial distribution and risk assessment using geostatistics in R Type Journal Article
Year 2020 Publication J. Hazard. Toxic Radioact. Waste Abbreviated Journal
Volume 24 (1) Issue Pages 04019031
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Call Number CUT @ phaedon.kyriakidis @ varouchakis2020 Serial 106
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