Prof. Peiyue Li is a full professor in the field of hydrogeology and environmental sciences at Chang’an University, China. He serves as the Vice Dean of School of Water and Environment at this university. He holds a Ph.D. in Groundwater Science and Engineering (2014), and has wide experience in groundwater quality assessment, hydrogeochemistry, and groundwater modeling. Peiyue Li has been selected for the National Ten Thousand Talents Program as a Young Talent and recognized as a Young Changjiang Scholar by the Ministry of Education. He has edited and co-edited 12 textbooks and academic monographs, and published over 220 articles in refereed journals. He at present serves as Associate Editors for Exposure and Health, Mine Water and the Environment, Archives of Environmental Contamination and Toxicology, Environmental Monitoring and Assessment, Human and Ecological Risk Assessment, Applied Water Science, Water Practice and Technology, and Discover Water. He is also book series editors for Springer Hydrogeology,Cave and Karst Systems of the World, Advances in Karst Science. He has been awarded one of the most highly cited researchers by Clarivate, Elsevier, and other organizations.Dr. Jianhua Wu is a Full Professor at Chang'an University in China, specializing in hydrology and water resources in arid areas, loess seepage and its disaster mechanisms, and groundwater environmental protection. Her research has been supported by numerous research projects funded by the National Natural Science Foundation of China. Her research output includes over 80 academic papers published in international journals, with 16 of them recognized as highly cited and popular papers by Essential Science Indicators. In addition to her research contributions, Dr. Wu actively engages in the academic community as an associate editor for the international journal Exposure and Health.Dr. Xiaodong He is an assistant professor at Chang'an University, China. He holds a Ph.D. in hydraulic engineering from Chang'an University and possesses extensive expertise in hydrogeochemistry, water-rock interaction, water ecology, and water security. Dr. He has published over 20 scientific papers in renowned international journals, focusing on groundwater quality and groundwater pollution.In recognition of his research excellence, he was selected as one of the Top 2% Top Scientists Worldwide by Stanford University in 2022.Dr. Yuanhang Wang is a young researcher with extensive experience in hydrogeology and environmental science. His research interests encompass a wide range of topics, including groundwater quality assessment, groundwater hydrochemistry, moisture movement, and in-situ tracer tests. Many of his papers have gained considerable recognition and have been widely cited by fellow researchers. He successfully chaired the Doctoral Foundation project of the Ministry of Education. Additionally, he has actively participated in numerous national and provincial research projects.Dr. Xiaofei Ren is a young researcher who has made significant contributions to the fields of hydrogeology and environmental science. His work includes groundwater quality assessment, groundwater hydrochemistry, isotope hydrology, and ecological base-flow. Dr. Ren's involvement in national and provincial research initiatives, particularly the National Natural Science Foundation Project, showcases his active engagement in advancing scientific knowledge.Dr. Lingxi Li is a researcher affiliated with the School of Water and Environment at Chang'an University. Her research interests revolve around the assessment of groundwater and surface water environmental quality, as well as hydrogeochemistry. Lingxi Li's contributions to the field have been recognized through her receipt of provincial awards twice for her work on the Qinling Ecological and Environmental Protection Projects.

• Water Research in Qinling Mountains: An Introduction.- Overview of the Study Area.- Main Rivers Originating from the Northern Qinling Mountains.- Ecological Baseflow Estimation for Selected Rivers in the Northern Qinling Mountains.- Surface Water Quality in the Northern Qinling Mountains.- Hydrochemistry and Quality of Groundwater.- Surface Water-Groundwater Interactions in Selected River Basins.- Land Use Changes in Selected Areas of the Northern Qinling Mountains.- Groundwater Nitrate Pollution and Health Risks Under Land Use Changes.- Water Resources Protection and Management.- Conclusions and Future Perspectives.

Prof. Peiyue Li is a full professor in the field of hydrogeology and environmental sciences at Chang’an University, China. He serves as the Vice Dean of School of Water and Environment at this university. He holds a Ph.D. in Groundwater Science and Engineering (2014), and has wide experience in groundwater quality assessment, hydrogeochemistry, and groundwater modeling. Peiyue Li has been selected for the National Ten Thousand Talents Program as a Young Talent and recognized as a Young Changjiang Scholar by the Ministry of Education. He has edited and co-edited 12 textbooks and academic monographs, and published over 220 articles in refereed journals. He at present serves as Associate Editors for Exposure and Health, Mine Water and the Environment, Archives of Environmental Contamination and Toxicology, Environmental Monitoring and Assessment, Human and Ecological Risk Assessment, Applied Water Science, Water Practice and Technology, and Discover Water. He is also book series editors for Springer Hydrogeology,Cave and Karst Systems of the World, Advances in Karst Science. He has been awarded one of the most highly cited researchers by Clarivate, Elsevier, and other organizations.Dr. Jianhua Wu is a Full Professor at Chang'an University in China, specializing in hydrology and water resources in arid areas, loess seepage and its disaster mechanisms, and groundwater environmental protection. Her research has been supported by numerous research projects funded by the National Natural Science Foundation of China. Her research output includes over 80 academic papers published in international journals, with 16 of them recognized as highly cited and popular papers by Essential Science Indicators. In addition to her research contributions, Dr. Wu actively engages in the academic community as an associate editor for the international journal Exposure and Health.Dr. Xiaodong He is an assistant professor at Chang'an University, China. He holds a Ph.D. in hydraulic engineering from Chang'an University and possesses extensive expertise in hydrogeochemistry, water-rock interaction, water ecology, and water security. Dr. He has published over 20 scientific papers in renowned international journals, focusing on groundwater quality and groundwater pollution.In recognition of his research excellence, he was selected as one of the Top 2% Top Scientists Worldwide by Stanford University in 2022.Dr. Yuanhang Wang is a young researcher with extensive experience in hydrogeology and environmental science. His research interests encompass a wide range of topics, including groundwater quality assessment, groundwater hydrochemistry, moisture movement, and in-situ tracer tests. Many of his papers have gained considerable recognition and have been widely cited by fellow researchers. He successfully chaired the Doctoral Foundation project of the Ministry of Education. Additionally, he has actively participated in numerous national and provincial research projects.Dr. Xiaofei Ren is a young researcher who has made significant contributions to the fields of hydrogeology and environmental science. His work includes groundwater quality assessment, groundwater hydrochemistry, isotope hydrology, and ecological base-flow. Dr. Ren's involvement in national and provincial research initiatives, particularly the National Natural Science Foundation Project, showcases his active engagement in advancing scientific knowledge.Dr. Lingxi Li is a researcher affiliated with the School of Water and Environment at Chang'an University. Her research interests revolve around the assessment of groundwater and surface water environmental quality, as well as hydrogeochemistry. Lingxi Li's contributions to the field have been recognized through her receipt of provincial awards twice for her work on the Qinling Ecological and Environmental Protection Projects.

• Water Research in Qinling Mountains: An Introduction.- Overview of the Study Area.- Main Rivers Originating from the Northern Qinling Mountains.- Ecological Baseflow Estimation for Selected Rivers in the Northern Qinling Mountains.- Surface Water Quality in the Northern Qinling Mountains.- Hydrochemistry and Quality of Groundwater.- Surface Water-Groundwater Interactions in Selected River Basins.- Land Use Changes in Selected Areas of the Northern Qinling Mountains.- Groundwater Nitrate Pollution and Health Risks Under Land Use Changes.- Water Resources Protection and Management.- Conclusions and Future Perspectives.

Prof. Peiyue Li is a full professor in the field of hydrogeology and environmental sciences at Chang’an University, China. He serves as the Vice Dean of School of Water and Environment at this university. He holds a Ph.D. in Groundwater Science and Engineering (2014), and has wide experience in groundwater quality assessment, hydrogeochemistry, and groundwater modeling. Peiyue Li has been selected for the National Ten Thousand Talents Program as a Young Talent and recognized as a Young Changjiang Scholar by the Ministry of Education. He has edited and co-edited 12 textbooks and academic monographs, and published over 220 articles in refereed journals. He at present serves as Associate Editors for Exposure and Health, Mine Water and the Environment, Archives of Environmental Contamination and Toxicology, Environmental Monitoring and Assessment, Human and Ecological Risk Assessment, Applied Water Science, Water Practice and Technology, and Discover Water. He is also book series editors for Springer Hydrogeology,Cave and Karst Systems of the World, Advances in Karst Science. He has been awarded one of the most highly cited researchers by Clarivate, Elsevier, and other organizations.Dr. Jianhua Wu is a Full Professor at Chang'an University in China, specializing in hydrology and water resources in arid areas, loess seepage and its disaster mechanisms, and groundwater environmental protection. Her research has been supported by numerous research projects funded by the National Natural Science Foundation of China. Her research output includes over 80 academic papers published in international journals, with 16 of them recognized as highly cited and popular papers by Essential Science Indicators. In addition to her research contributions, Dr. Wu actively engages in the academic community as an associate editor for the international journal Exposure and Health.Dr. Xiaodong He is an assistant professor at Chang'an University, China. He holds a Ph.D. in hydraulic engineering from Chang'an University and possesses extensive expertise in hydrogeochemistry, water-rock interaction, water ecology, and water security. Dr. He has published over 20 scientific papers in renowned international journals, focusing on groundwater quality and groundwater pollution.In recognition of his research excellence, he was selected as one of the Top 2% Top Scientists Worldwide by Stanford University in 2022.Dr. Yuanhang Wang is a young researcher with extensive experience in hydrogeology and environmental science. His research interests encompass a wide range of topics, including groundwater quality assessment, groundwater hydrochemistry, moisture movement, and in-situ tracer tests. Many of his papers have gained considerable recognition and have been widely cited by fellow researchers. He successfully chaired the Doctoral Foundation project of the Ministry of Education. Additionally, he has actively participated in numerous national and provincial research projects.Dr. Xiaofei Ren is a young researcher who has made significant contributions to the fields of hydrogeology and environmental science. His work includes groundwater quality assessment, groundwater hydrochemistry, isotope hydrology, and ecological base-flow. Dr. Ren's involvement in national and provincial research initiatives, particularly the National Natural Science Foundation Project, showcases his active engagement in advancing scientific knowledge.Dr. Lingxi Li is a researcher affiliated with the School of Water and Environment at Chang'an University. Her research interests revolve around the assessment of groundwater and surface water environmental quality, as well as hydrogeochemistry. Lingxi Li's contributions to the field have been recognized through her receipt of provincial awards twice for her work on the Qinling Ecological and Environmental Protection Projects.

• Water Research in Qinling Mountains: An Introduction.- Overview of the Study Area.- Main Rivers Originating from the Northern Qinling Mountains.- Ecological Baseflow Estimation for Selected Rivers in the Northern Qinling Mountains.- Surface Water Quality in the Northern Qinling Mountains.- Hydrochemistry and Quality of Groundwater.- Surface Water-Groundwater Interactions in Selected River Basins.- Land Use Changes in Selected Areas of the Northern Qinling Mountains.- Groundwater Nitrate Pollution and Health Risks Under Land Use Changes.- Water Resources Protection and Management.- Conclusions and Future Perspectives.