Intro
Foreword
Preface
Acknowledgments
Contents
Editors and Contributors
Water Resources and Water Quality
Recent Advances in Water Quality, Soil Pollution, Disaster Risk Reduction, and Carbon Neutrality: Seeking Environmental Sustainability
1 Introduction
2 Recent Research Advances in Water Quality
3 Recent Research Advances in Soil Pollution
4 Recent Research Advances in Disaster Risk Reduction
5 Recent Research Advances in Carbon Neutrality
6 Final Words
References

Investigation of Helium Isotopes in Groundwater of Kuwait Group and Dammam Formation Aquifers of Kuwait
1 Introduction
2 Hydrogeology
3 Analytical Methods
4 Results and Discussion
5 Conclusion
References
Hydrochemistry and Water Quality Assessment in Labuan Island, Malaysia
1 Introduction
2 Study Area
2.1 Geology of the Area
2.2 Land Use Pattern
2.3 Hydrogeology
3 Materials and Methods
3.1 Sampling and Data Acquisition
3.2 Measurement Techniques
3.3 Water Quality Index (WQI)
3.4 Heavy Metal Evaluation Index (HEI)
4 Results and Discussion

4.1 Hydrochemical Characteristics
4.2 Hydrogeochemical Processes
4.3 Assessment of Water Quality
5 Conclusions
References
Prediction of Groundwater Arsenic Risk in the Alluvial Plain of the Lower Yellow River by Ensemble Learning, North China
1 Introduction
2 Research Methods
2.1 Overview of the Study Area
2.2 Selection and Processing of Environmental Variables
2.3 Model Construction and Verification
3 Results and Discussion
3.1 Statistics and Distribution Characteristics of Arsenic Concentration in Groundwater

3.2 Distribution Characteristics of High Arsenic in Groundwater
3.3 Analysis of Driving Factors
4 Conclusions and Recommendations
References
Geochemistry and Isotope Hydrogeology of the Maracaibo Aquifer System (Venezuela) and Its Implications for Urban Water Supply
1 Introduction
2 Maracaibo City
3 Hydrogeology of Maracaibo
4 Drinking Water Service in Maracaibo
5 Water Supply Resources in Maracaibo
6 Groundwater and Drinking Water Quality in Maracaibo
7 Groundwater Origin in the Maracaibo Aquifer

8 Conclusions and Recommendations for Sustainable Groundwater Management
References
Hydrochemistry and Water Quality for Lakes Supplied by Water Replenishment in Arid Regions of China
1 Introduction
2 Study Area
3 Materials and Methods
3.1 Sample Collection and Analysis
3.2 Irrigation Water Quality Assessment
4 Results
4.1 Major Ions in Lake Water
4.2 Nutrient Element Variation
4.3 Source Identification and Apportionment
4.4 Irrigation Water Assessment
5 Discussion
6 Conclusions
References