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Numerical modeling of regional groundwater flow in the Heihe River Basin,China:Advances and new insights

Science China Earth Sciences 2015年第1期58卷 3-15页

作者： YAO YingYing ZHENG ChunMiao TIAN Yong LIU Jie ZHENG Yi Center for Water Research College of EngineeringPeking University Department of Geological Sciences University of Alabama

Numerical groundwater modeling is an effective tool to guide water resources management and explore complex groundwater-dependent ecosystems in arid *** the Heihe River Basin(HRB),China’s second largest inland river basin located in arid northwest China,a series of groundwater flow models have been developed for those purposes over the past 20 *** models have elucidated the characteristics of groundwater flow systems and provided the scientific basis for a more sustainable management of groundwater resources and ecosystem *** first part of this paper presents an overview of previous groundwater modeling studies and key lessons learned based on seven different groundwater models in the middle and lower HRB at sub-basin *** second part reviews the rationale for development of a regional basin-scale groundwater flow model that unifies previous sub-basin *** addition,this paper discusses the opportunities and challenges in developing a regional groundwater flow model in an arid river basin such as the HRB.

关键词： Heihe River Basin groundwater flow modeling regional hydrogeology sustainable groundwater management ecohy-drology

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In-situ observation and transport modelling of arsenic in Gangetic plain,India

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Emerging Contaminants 2017年第4期3卷 138-143页

作者： Pankaj Kumar Gupta Pranjay Joshi Jahangeer Department of Hydrology Indian Institute of Technology Roorkee247667UttarakhandIndia Department of Soil and Water Conservation G.B.Pant University of Agriculture&TechnologyPantnagar263145UttarakhandIndia University of NebraskaeLincoln NebraskaLincolnNE68588USA

The focus of this study is to investigate the arsenic movement and impacts on the residual concentrations on groundwater pollution *** Gangetic plain area in the Ballia,Uttar Pradesh is selected as study area,which is also reported to extreme arsenic pollution in soil-water system.A modelling approach is developed to assess the arsenic flux in partially saturated zone using data of soil texture,soil hydraulic properties and *** type,slope,and land-use cover is considered for estimating the transient flux at the top boundary from daily precipitation and evapotranspiration data of the study *** transport in the subsurface is predicted by the mass transfer equation,which is derived by integrating Darcy's law with the equation of mass *** arsenic profiles of varying hydrogeological conditions associated with different locations in the study area are presented as breakthrough *** results shows that the arsenic transport is dominated by the advective flux and strongly depends on the soilmoisture flow *** may increases the arsenic load to underlaying groundwater *** simulated results suggest that mobility plays a vital role arsenic transport as well as on adsorbed arsenic concentration in ***,the adsorption isotherms show that the high peak curve for Bairai and low at Sikarderpur.A higher pollution risk is observed in the Belthara Road,whereas a lower vulnerability is computed in the north and northeast *** study can help in strategising sustainable groundwater management and protection planning of identified regions of India.

关键词： Arsenic transport Adsorption Subsurface sustainable groundwater management

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