Charles B. Andrews
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View article: Characterizing human exposure to multi-class antibiotics through urine biomonitoring in a Chinese population
Characterizing human exposure to multi-class antibiotics through urine biomonitoring in a Chinese population Open
The growing threat of antimicrobial resistance to global public health underscores the urgent need for biomonitoring of human exposure to antibiotics in the environment, for which data are currently limited in the general population. In th…
View article: Multivariate statistical analysis of hydrogeochemical data to identify and delineate primary influences on groundwater chemistry
Multivariate statistical analysis of hydrogeochemical data to identify and delineate primary influences on groundwater chemistry Open
This study uses multivariate statistical analyses to identify and delineate mine-influenced groundwater from other types of groundwater near a former copper mine in Yerington, NV, USA. This statistical approach was used because some analyt…
View article: Seeing China's Invisible Groundwater: Advances and Challenges
Seeing China's Invisible Groundwater: Advances and Challenges Open
In 2021, China adopted comprehensive “Groundwater Management Regulations” to address critical groundwater issues, building upon the foundation of a national groundwater monitoring network established by 2020. This commentary reviews the de…
View article: Undervalued Groundwater Resources Over the Major Tectonic Lines of Southeastern China
Undervalued Groundwater Resources Over the Major Tectonic Lines of Southeastern China Open
Rising water demand for agricultural, industrial, and domestic sectors continue to stress water resources worldwide. In southeastern China, coastal cities and megacities typically rely on thousands of reservoirs, incurring high constructio…
View article: Integrated Modeling of Flow, Soil Erosion, and Nutrient Dynamics in a Regional Watershed: Assessing Natural and Human‐Induced Impacts
Integrated Modeling of Flow, Soil Erosion, and Nutrient Dynamics in a Regional Watershed: Assessing Natural and Human‐Induced Impacts Open
Current integrated modeling frameworks for simulating nutrient sources and dynamics are inadequate for large regional watersheds dominated by groundwater‐surface water interactions due to their simplistic representations of groundwater. In…
View article: Methods for Quantifying Interactions Between Groundwater and Surface Water
Methods for Quantifying Interactions Between Groundwater and Surface Water Open
Driven by the need for integrated management of groundwater (GW) and surface water (SW), quantification of GW–SW interactions and associated contaminant transport has become increasingly important. This is due to their substantial impact o…
View article: A New Simulation‐Optimization Framework for Estimation of Submarine Groundwater Discharge Based on Hydrodynamic Modeling and Isotopic Data
A New Simulation‐Optimization Framework for Estimation of Submarine Groundwater Discharge Based on Hydrodynamic Modeling and Isotopic Data Open
Estimation of submarine groundwater discharge (SGD) has traditionally relied on isotopic mass balance calculation, which is a form of regional box modeling. Here we propose an entirely new approach for SGD estimation by coupling a general …
View article: The China groundwater crisis: A mechanistic analysis with implications for global sustainability
The China groundwater crisis: A mechanistic analysis with implications for global sustainability Open
Over the past several decades, China has rapidly depleted groundwater storage, and has lagged in managing and protecting this resource. As a result, dried up rivers, land subsidence, saltwater intrusion, and wetland losses are extensive. T…
View article: Human daily dietary intakes of antibiotic residues: Dominant sources and health risks
Human daily dietary intakes of antibiotic residues: Dominant sources and health risks Open
Antibiotic use in crops is an emerging concern, however, human exposure to antibiotics residues through consumption of plant-derived food has generally been neglected. This study is a comprehensive evaluation based on full consideration of…
View article: The Role of Aquifers in Sustaining the Sponge City Concept in Chinese High-Density Housing
The Role of Aquifers in Sustaining the Sponge City Concept in Chinese High-Density Housing Open
Chinese cities and megacities occupy large areas with high population densities. These urban sectors have extensive impervious surfaces and import large amounts of water from pristine sources, putting pressure on the urban drainage systems…
View article: Hydrogeological Criteria to Improve the Sponge City Strategy of China
Hydrogeological Criteria to Improve the Sponge City Strategy of China Open
China is facing frequent waterlogging and an increasing water scarcity that mirrors the fast urban and economic expansion of the last 4 decades. To mitigate these issues, the government promulgated the “Sponge City” strategy; a concept roo…
View article: Role of Groundwater in Sustaining Northern Himalayan Rivers
Role of Groundwater in Sustaining Northern Himalayan Rivers Open
The Himalayas are critical for supplying water for ∼2 billion people who live downstream, and available water is highly sensitive to climate change. The role of the groundwater system in sustaining the northern Himalayan rivers remains unk…
View article: Dynamics of seasonally frozen ground in the Yarlung Zangbo River Basin on the Qinghai-Tibet Plateau: historical trend and future projection
Dynamics of seasonally frozen ground in the Yarlung Zangbo River Basin on the Qinghai-Tibet Plateau: historical trend and future projection Open
Seasonally frozen ground (SFG) is a critical component of the Earth’s surface that affects energy exchange and the water cycle in cold regions. The estimation of SFG depth has generally required intensive parameterization which has limited…
View article: Can groundwater be protected from the pressure of china's urban growth?
Can groundwater be protected from the pressure of china's urban growth? Open
Groundwater is expected to be more vulnerable to water-quality degradation in the future due to rapid urbanization. However, despite knowledge that protecting future groundwater resources is necessary for sustainable groundwater resource d…
View article: Hydrogeology of the Pearl River Delta, southern China
Hydrogeology of the Pearl River Delta, southern China Open
The study describes the hydrogeological setting of the Pearl River Delta, a sub-tropical area of southern China encompassing the metropolises of Guangzhou, Shenzhen, Hong Kong and Macau. In the last 40 years, a booming economy and a popula…
View article: Hydrogeological constraints and opportunities for “Sponge City” development: Shenzhen, southern China
Hydrogeological constraints and opportunities for “Sponge City” development: Shenzhen, southern China Open
Study area: Shenzhen Megacity, southern China. Study focus: “Sponge City” is a Chinese concept aimed to mitigate flood risk, tackle chronic water scarcity, and improve the urban environment. It consists of a combination of new storage and …
View article: Efficient detection and assessment of human exposure to trace antibiotic residues in drinking water
Efficient detection and assessment of human exposure to trace antibiotic residues in drinking water Open
Human exposure to antibiotic residues in drinking water has not been well evaluated. This study is the first attempt to simultaneously and efficiently identify and quantify 92 antibiotic residues in filtered tap water (multistage filtratio…
View article: Analysis of groundwater resources in densely populated urban watersheds with a complex tectonic setting: Shenzhen, southern China
Analysis of groundwater resources in densely populated urban watersheds with a complex tectonic setting: Shenzhen, southern China Open
Shenzhen is the major financial and high-tech center in southern China. The megacity has grown rapidly in the last 40 years with the population increasing from about 30,000 in 1979 to 20 million in 2016. The study area (2,015 km2) is about…
View article: Role of Groundwater in the Dryland Ecohydrological System: A Case Study of the Heihe River Basin
Role of Groundwater in the Dryland Ecohydrological System: A Case Study of the Heihe River Basin Open
Key Points Shallow groundwater (<10 m deep) of alluvial plain responds to land surface regimes and dominates seasonal water budget variations Groundwater system in mountainous upstream impacts the evapotranspiration and surface‐groundwater…
View article: A Modified Water-Table Fluctuation Method to Characterize Regional Groundwater Discharge
A Modified Water-Table Fluctuation Method to Characterize Regional Groundwater Discharge Open
A modified Water-Table Fluctuation (WTF) method is developed to quantitatively characterize the regional groundwater discharge patterns in stressed aquifers caused by intensive agricultural pumping. Two new parameters are defined to expres…
View article: What controls the partitioning between baseflow and mountain block recharge in the Qinghai‐Tibet Plateau?
What controls the partitioning between baseflow and mountain block recharge in the Qinghai‐Tibet Plateau? Open
Mountainous areas are referred to as “water towers” since they are the source of water for many low‐lying communities. The hydrologic budgets of these areas, which are particularly susceptible to climate change, are typically poorly constr…
View article: Case Study: An Effective Model for Green Roofs in San Diego County
Case Study: An Effective Model for Green Roofs in San Diego County Open
Green roofs provide a myriad of environmental and financial benefits to a building and its owner. They can provide a pleasing outdoor aesthetic in an urban environment, as well as provide stormwater management and energy savings in an arid…