Rui Ma

ORCID: 0000-0003-1061-3938
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About
Contact & Profiles
Research Areas
  • Groundwater flow and contamination studies
  • Groundwater and Isotope Geochemistry
  • Hydrology and Watershed Management Studies
  • Soil and Unsaturated Flow
  • Climate change and permafrost
  • Cryospheric studies and observations
  • Radioactive element chemistry and processing
  • Soil Moisture and Remote Sensing
  • Environmental and Agricultural Sciences
  • Environmental Changes in China
  • Hydraulic Fracturing and Reservoir Analysis
  • Arctic and Antarctic ice dynamics
  • Remote Sensing and Land Use
  • Karst Systems and Hydrogeology
  • Wastewater Treatment and Nitrogen Removal
  • Metabolomics and Mass Spectrometry Studies
  • Radioactive contamination and transfer
  • Plant Water Relations and Carbon Dynamics
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Heavy metals in environment
  • Landslides and related hazards
  • Groundwater and Watershed Analysis
  • Geoscience and Mining Technology
  • Geomechanics and Mining Engineering
  • Radioactivity and Radon Measurements

China University of Geosciences
2016-2025

University College London
2024

China University of Geosciences (Beijing)
2022

Lanzhou University
2021

Ministry of Natural Resources
2020

Jiangsu University
2019

University of Nebraska–Lincoln
2009-2015

Chinese Academy for Environmental Planning
2015

University of Nebraska at Omaha
2015

Ministry of Ecology and Environment
2015

Driven by the need for integrated management of groundwater (GW) and surface water (SW), quantification GW–SW interactions associated contaminant transport has become increasingly important. This is due to their substantial impact on quantity quality. In this review, we provide an overview methods developed over past several decades investigate interactions. These include geophysical, hydrometric, tracer techniques, as well various modeling approaches. Different reveal valuable information...

10.1146/annurev-environ-111522-104534 article EN Annual Review of Environment and Resources 2024-07-18

10.2136/vzj2010.0151 article EN Vadose Zone Journal 2011-05-01

Understanding the heavy metal (HM) contamination in alpine mountain headwaters regions is important to maintaining ecosystem stability of basin. A total 119 water samples and 104 sediment were collected along tributaries main course Heihe River. The concentrations eight metals (As, Cd, Cr, Cu, Mn, Ni, Pb, Zn) measured describe their spatial variability assess quality. To identify origins pathways HMs, anions, cations, trace elements, as well δD/δ18O stable isotopes also measured. results...

10.3390/ijerph15091987 article EN International Journal of Environmental Research and Public Health 2018-09-12

MT3DMS is a three-dimensional multi-species solute transport model for solving advection, dispersion, and chemical reactions of contaminants in saturated groundwater flow systems. interfaces directly with the U.S. Geological Survey finite-difference MODFLOW solution supports hydrologic discretization features MODFLOW. contains multiple techniques one code, which can often be important, including calibration. Since its first release 1990 as MT3D single-species mass modeling, has been widely...

10.13031/2013.42263 article EN Transactions of the ASABE 2012-01-01

Abstract. The roles of groundwater flow in the hydrological cycle within alpine area characterized by permafrost and/or seasonal frost are poorly known. This study explored role controlling and connections between glaciers high mountains rivers low piedmont plain with respect to hydraulic head, temperature, geochemical isotopic data, at a representative catchment headwater region Heihe River, northeastern Qinghai–Tibet Plateau. results show that mainly occurred as suprapermafrost...

10.5194/hess-21-4803-2017 article EN cc-by Hydrology and earth system sciences 2017-09-27

Decoupled simulation of groundwater flow and heat transport assuming constant fluid density viscosity is computationally efficient simple. However, by neglecting the effects variable viscosity, numerical solution may be inaccurate. This study investigates conditions under which on modeling can neglected without any significant loss computational accuracy. A cross-section model aquifer-river interactions at Hanford 300 Area in Washington State was employed as reference frame to quantify role...

10.1111/j.1745-6584.2009.00660.x article EN Ground Water 2009-12-16

This study explores field‐scale modeling of U(VI) reactive transport through incorporation laboratory and field data. A model was developed on the basis laboratory‐characterized surface complexation reactions (SCRs) multirate mass transfer processes, as well field‐measured hydrogeochemical conditions at U.S. Department Energy, Hanford 300 Area (300 A), Washington. The used to assess importance processes evaluate effect variable geochemical caused by dynamic river water‐groundwater...

10.1029/2009wr008168 article EN Water Resources Research 2010-05-01

A tracer test using both bromide and heat tracers conducted at the Integrated Field Research Challenge site in Hanford 300 Area (300A), Washington, provided an instrument for evaluating utility of aquifer characterization. The data were critical to improving calibration flow model complicated by highly dynamic nature field. However, most concentrations obtained from fully screened observation wells, lacking depth‐specific resolution vertical On other hand, temperature relatively simple...

10.1029/2011wr011281 article EN Water Resources Research 2012-07-03

Abstract Compared with arctic and subarctic catchments, our knowledge about the hydrological functions of glaciers porous aquifers is still limited for partly glacierized alpine‐gorge headwaters in Qinghai‐Tibet Plateau. Here we examine impact glacial groundwater storage on variability warm‐season (June to September) discharge from Hulugou catchment, an headwater 3% coverage, by quantifying timing magnitude contributions glacier‐snow meltwater, baseflow, rainwater streamflow using a...

10.1029/2018jd028683 article EN Journal of Geophysical Research Atmospheres 2018-08-18

While the individual effects of permafrost and seasonal frost on interactions between groundwater surface water have received much attention, few attempts been made to investigate together flow its with water. In this study, hydraulic, chemical, isotopic data as well a Bayesian mixing model were employed streams groundwater, contributions mainstream, their relationships distribution in representative subcatchment headwater region Heihe River Basin northeastern Qinghai-Tibet Plateau China....

10.1029/2020jd033689 article EN Journal of Geophysical Research Atmospheres 2021-02-13

Abstract Hydraulic conductivity curves (HCCs) are important inputs in land surface modeling. The general way for predicting an HCC from a soil water retention curve (SWRC) requires additional input of the saturated hydraulic conductivity. However, macro effect near saturation often results difficulty and poor performance when In this paper, we introduce novel method fully SWRC, requiring no parameters. This is achieved by applying estimated (from SWRC) dry range as new matching point,...

10.1029/2021wr031297 article EN Water Resources Research 2022-04-01

Abstract Natural aquifers are often characterized by multiscale heterogeneity and complex flow networks, challenging the reliable simulation prediction of contaminant transport. Classic stochastic transport models usually assume independent, identically distributed probability density functions when upscaling solute dynamics, but this assumption is not valid for media with heterogeneity. To address issue, a dual heterogeneous domain model (DHDM) was proposed to quantify in where breakthrough...

10.1029/2021wr031128 article EN cc-by-nc-nd Water Resources Research 2022-04-01

Abstract In cold alpine areas, the hydrological control on dissolved organic matter (DOM) export in relation to permafrost distribution remains uncertain a catchment scale. To address this, seasonal variations DOM chemical features of groundwater and stream water were examined from 2013 2019 representative northeastern Qinghai–Tibet Plateau, which is covered by both (at elevations higher than 3,500 m a.s.l.) seasonally frozen areas. The results show that highest carbon (DOC) concentration...

10.1029/2022wr032426 article EN Water Resources Research 2023-01-30

Abstract Understanding the change in soil hydraulic conductivity with temperature is key to predicting groundwater flow and solute transport cold regions. The most commonly used models for during freeze‒thaw cycles only consider of capillary water neglect flowing along thin films around particle surface. This paper proposed a new model frozen via Clausius–Clapeyron equation based on an unsaturated over entire moisture range using analogy between dry‒wet processes soils. single describe...

10.1029/2023wr036857 article EN cc-by-nc-nd Water Resources Research 2025-01-01

Abstract Soil hydraulic properties (SHPs) are impacted by various mechanisms such as soil structure, capillarity, and adsorption forces, often showing a bimodal shape. Developing models (SHMs) that describe SHPs over the entire saturation range involves balancing representation of multiple processes while minimizing number free‐fitted parameters. Existing SHMs rarely capture across full moisture or introduce higher In this study, we propose novel framework to range, accounting for effects...

10.1029/2024wr038450 article EN cc-by Water Resources Research 2025-01-30
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