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Recharge and vulnerability assessment of groundwater resources in North west India:Insights from isotope-geospatial modelling approach

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Geoscience Frontiers 2024年第1期15卷 247-262页

作者： Annadasankar Roy Sitangshu Chatterjee Uday Kumar Sinha Anil Kumar Jain Hemant Mohokar Ajay Jaryal Tirumalesh Keesari Harish Jagat Pant Isotope and Radiation Application Division Bhabha Atomic Research CentreTrombayMumbai–400085India Homi Bhabha National Institute Mumbai 400094India Central Ground Water Board AhmedabadGujaratIndia

Recent studies indicate dwindling groundwater quantity and quality of the largest regional aquifer system in North West India,raising concern over freshwater availability to about 182 million population residing in this region.Widespread agricultural activities have resulted severe groundwater pollution in this area,demanding a systematic vulnerability assessment for proactive measures.Conventional vulnerability assessment models encounter drawbacks due to subjectivity,complexity,data-prerequisites,and spatial-temporal constraints.This study incorporates isotopic information into a weighted-overlay framework to overcome the above-mentioned limitations and proposes a novel vulnerability assessment model.The isotope methodology provides crucial insights on groundwater recharge mechanisms(18O and 2H)and dynamics(3H)-often ignored in vulnerability assessment.Isotopic characterisation of precipitation helped in establishing Local Meteoric Water Line(LMWL)as well as inferring contrasting recharge mechanisms operating in different aquifers.Shallow aquifer(depth<60 m)showed significant evaporative signature with evaporation loss accounting up to 18.04%based on Rayleigh distillation equations.Inter-aquifer connections were apparent from Kernel Density Estimate(KDE)and isotope correlations.A weighted overlay isotope-geospatial model was developed combining 18O,3H,aquifer permeability,and water level data.The central and northern parts of study area fall under least(0.29%)and extremely(1.79%)vulnerable zones respectively,while majority of the study area fall under moderate(42.71%)and highly vulnerable zones(55.20%).Model validation was performed using groundwater NO3-concentration,which showed an overall accuracy up to 82%.Monte Carlo Simulation(MCS)was performed for sensitivity analysis and permeability was found to be the most sensitive input parameter,followed by 3H,18O,and water level.Comparing the vulnerability map with Land Use Land Cover(LULC)and population density maps helped in precisely identifying the high-risk s

关键词： agricultural pollution Data scarcity Recharge mechanism Rayleigh distillation Isotope-geospatial model Vulnerability assessment

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Tendency and Control Strategy of agricultural Environmental pollution in China

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Meteorological and Environmental Research 2013年第7期4卷 35-38页

作者： Qiuping Han Zhencheng Xu Zhenyuan Guo Xibang Hu Dong Zeng Hunan agricultural University South China Institute of Environmental Sciences MEP Guangzhou Institute of Geochemistry Chinese Academy of Sciences

Current situation of China＇s agricultural pollution was elaborated, and the causes of the pollution were analyzed. Moreover, China＇s agri- cultural pollution tendency in the next few years was predicted. In order to control agricultural pollution in China, we should construct a diet structure for health and ecological civilization and create an ecological food chain by establishing a new concept of diet.

关键词： agricultural pollution Diet Ecology Transformation and upgrade China

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Modelling the role of ground-true riparian vegetation for providing regulating services in a Mediterranean watershed

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International Soil and Water Conservation Research 2023年第1期11卷 159-168页

作者： Bruno A.Aparício João Pedro Nunes Léonard Bernard-Jannin Luis Filipe Dias Andre Fonseca Teresa Ferreira cE3c-Centre for Ecology Evolution and Environmental Changes&CHANGE-Global Change and Sustainability InstituteFaculty of SciencesUniversity of LisbonLisbonPortugal Forest Research Centre&Laboratory TERRA School of AgricultureUniversity of LisbonLisbonPortugal Soil Physics and Land Management Group Wageningen University and ResearchWageningenNetherlands Longline Environment Ltd LondonUK

Intensive agricultural and industrial activities are often considered major sources of water contamina-tion.Currently,riparian vegetation(RV)is increasingly being promoted as a solution to balance the potentially adverse effects that agriculture may have on water quality.Nonetheless,existing RV is often overlook in recent modelling efforts,failing to capture the current amount of ecosystem services provide.Here,we used the Soil and Water Assessment Tool ecohydrological model to simulate the influence of ground-true RV on i)nutrient(nitrate and total phosphorus)and sediment exports from agricultural areas and ii)its effect for in-stream concentrations.These results are further compared against a set of hypothetical scenarios of different RV widths and different land-uses.Our results point to a great rele-vance of existing RV in controlling in-stream concentration of sediments and nutrients where pressure from agriculture is highest,preventing them to surpass limits set in the EU Water Framework Directive.On the other hand,in areas with industry discharges,the role of RV is limited and model results suggest that restoring RV would have limited impacts.We illustrate how existing RV may already provide strong but not acknowledged water quality regulation services,how these services can differ substantially between nearby streams,and that effective strategies to improve water quality using RV must acknowledge existing patterns of vegetation,land use and contamination sources.

关键词： agricultural pollution Riparian vegetation Ecosystem services Hydrological services Mediterranean region

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Long-term agricultural contamination shaped diversity response of sediment microbiome

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Journal of Environmental Sciences 2021年第1期33卷 90-99页

作者： Lei Zhang Ziyin Wang Hua Cai Wenxuan Lu Jing Li School of Civil Engineering and Architecture Chuzhou UniversityChuzhou 239000China Nanjing Institute of Geography and Limnology Chinese Academy of SciencesNanjing 210008China Fisheries Research Institute Anhui Academy of Agricultural SciencesHefei 230036China

The pollution caused by agricultural production poses a threat to the ecological integrity of river ecosystems,altering the structure and function of river ecosystems.Differences in microbial community structure provide useful information about the impact of agricultural pollution on the biological integrity of ecosystems,but generally convey little information regarding ecosystem functions.In this study,using Illumina MiSeq sequencing technology based on the 16 S rRNA gene,river sediment samples associated with four different types of agricultural pollution were comprehensively analyzed.The results show that the total organic carbon(TOC)content was highest at the YZS site(animal husbandry sewage)among the assayed sites,but the species richness and uniformity were lowest at this site,which may have been caused by the high nutrient source of the sewage.Furthermore,in the three YZS samples affected by the long-term discharge of aquaculture tail-water,the unique genus Dechloromonas and the genus Candidatus-Competitor were observed,which are strongly correlated with phosphorus conversion.The formation of network modules may correspond to the coexistence of functional bacteria accustomed to multiple niche combinations under different agricultural pollution conditions in river sediments.According to the PICRUSt functional prediction,the bacterial community in the agricultural polluted river sediment primarily harbored 46 subfunctions,exhibiting richness of functions.Overall,our results provide a more comprehensive understanding of the structure and ecological processes associated with the aggregation of bacterial communities,which is beneficial for the management of river environments.

关键词： agricultural pollution Bacterial community Illumina miseq sequencing Co-occurrence patterns Functional prediction

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Photocatalytic removal of heavy metal ions and antibiotics in agricultural wastewater:A review

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Journal of Semiconductors 2023年第11期44卷 26-41页

作者： Jiaxin Song Malik Ashtar Ying Yang Yuan Liu Mingming Chen Dawei Cao School of Physics and Electronic Engineering Jiangsu UniversityZhenjiang 212013China

In recent years,the treatment of agricultural wastewater has been an important aspect of environmental protection.The purpose of photocatalytic technology is to degrade pollutants by utilizing solar light energy to stimulate the migration of photocarriers to the surface of photocatalysts and occur reduction-oxidation reaction with pollutants in agricultural wastewater.Photocatalytic technology has the characteristics of high efficiency,sustainability,low-energy and free secondary pollution.It is an environmental and economical method to recover water quality that only needs sunlight.In this paper,the mechanism and research progress of photocatalytic removal of heavy metal ions and antibiotics from agricultural water pollution were reviewed by combining photocatalytic degradation process with agricultural treatment technology.The mechanism of influencing factors of photocatalytic degradation efficiency was discussed in detail and corresponding strategies were proposed,which has certain reference value for the development of photocatalytic degradation.

关键词： photocatalysis agricultural pollution water quality remediation heavy metals antibiotics

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The status and distribution characteristics of residual mulching film in Xinjiang, China

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Journal of Integrative Agriculture 2016年第11期15卷 2639-2646页

作者： ZHANG Dan LIU Hong-bin HU Wan-li QIN Xiao-hui MA Xing-wang YAN Chang-rong WANG Hong-yuan Key Laboratory of Nonpoint Source pollution Control Ministry of Agriculture/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences Institute of agricultural Environment and Resources Yunnan Academy of Agricultural Sciences Protection Station of agricultural Resources and Environment Xinjiang Agricultural Department Institute of Soil Fertilizer and Water Saving Xinjiang Academy of Agricultural Sciences Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences

pollution of residual plastic film in arable lands is a severe problem in China. In this study, the status of residual film and influential factors were investigated using the methods of farm survey in combination with questionnaires and quadrat sampling at a large number of field sites in Xinjiang Uygur Autonomous Region, China. The results showed that the amount of film utilization increased largely and reached to 1.8×10~5 t in 2013. Similarly, the mulching area also substantially increased in recent decades, and reached to 2.7×10~5 ha in the same year. According to the current survey, 60.7% of the sites presented a greater mulch residue than the national film residue standard（75 kg ha^（–1））, and the maximum residual amount reached 502.2 kg ha^（–1） in Turpan, Xinjiang. The film thickness, the mulching time and the crop type all influenced mulch residue. The thickness of the film had significantly negative correlation with the amount of residual film（P0.05）, while the mulching years had significantly positive correlation with it（P0.05）. The total amount of residual film in Xinjiang was 3.43×105 t in 2011, which accounted for 15.3% of the cumulative dosage of mulching. Among all the crops, the cotton fields had the largest residual amount of mulch film（158.4 kg ha^（–1））, and also the largest contribution（2.6×10~5 tons） to the total amount of residual film in Xinjiang.

关键词： Xinjiang residual mulching film influential factor agricultural resources agricultural pollution

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