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Dynamic Modeling Framework of Sediment Trapped by Check-Dam Networks:A Case Study of a Typical Watershed on the Chinese Loess Plateau

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Engineering 2023年第8期27卷 209-221页

作者： Pengcheng Sun Yiping Wu key laboratory of degraded and unused land Consolidation Engineering the Ministry of Natural ResourcesShaanxi Provincial Land Engineering Construction Group Co.Ltd.Xi’an 710075China key laboratory of Soil and Water Conservation on the Loess Plateau of ministry of Water resources Yellow River Institute of Hydraulic ResearchZhengzhou 450003China Technology Innovation Center for land Engineering and Human Settlement Shaanxi Provincial Land Engineering Construction Group Co.Ltd.&Xi’an Jiaotong UniversityXi’an 710115China

Check-dam construction is an effective and widely used method for sediment trapping in the Yellow River Basin and other places over the world that are prone to severe soil *** estimations of the dynamic sediment trapped by check dams are necessary for evaluating the effects of check dams and planning the construction of new *** this study,we propose a new framework,named soil and water assessment tool(SWAT)–dynamic check dam(DCDam),for modeling the sediment trapped by check dams dynamically,by integrating the widely utilized SWAT model and a newly developed module called *** then applied this framework to a typical loess watershed,the Yan River Basin,to assess the time-varying effects of check-dam networks over the past 60 years(1957–2016).The DCDam module generated a specific check-dam network to conceptualize the complex connections at each time step(monthly).In addition,the streamflow and sediment load simulated by using the SWAT model were employed to force the sediment routing in the check-dam *** evaluation results revealed that the SWAT-DCDam framework performed satisfactorily,with an overestimation of 11.50%,in simulating sediment trapped by check dams,when compared with a field survey of the accumulated sediment *** the Yan River Basin,our results indicated that the designed structural parameters of check dams have evolved over the past 60 years,with higher dams(37.14%and 9.22%increase for large dams and medium dams,respectively)but smaller controlled areas(46.03%and 10.56%decrease for large dams and medium dams,respectively)in recent *** retained by check dams contributed to approximately 15.00%of the total sediment load reduction in the Yan River during 1970–***,our developed framework can be a promising tool for evaluating check-dam effects,and this study can provide valuable information and support to decision-making for soil and water conservation and check-dam planning and management.

关键词： Check dams Dynamic check dam(DCDam) Loess Plateau Sediment trapping SWAT

Spatiotemporal variations in ecosystem services and their trade-offs and synergies against the background of the gully control and land consolidation project on the Loess Plateau,China

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Journal of Arid land 2024年第1期16卷 131-145页

作者： WANG Jing WEI Yulu PENG Biao LIU Siqi LI Jianfeng key laboratory of degraded and unused land Consolidation Engineering Ministry of Natural and ResourcesXi'an 710075China Institute of land Engineering and Technology Shaanxi Provincial Land Engineering Construction Group Co.Ltd.Xi'an 710021China School of Human Settlements and Civil Engineering Xi'an Jiaotong UniversityXi'an 710049China Shaanxi key laboratory of land Consolidation Xi'an 710064China

Studying the spatiotemporal variations in ecosystem services and their interrelationships on the Loess Plateau against the background of the gully control and land consolidation(GCLC)project has significant implications for ecological protection and quality development of the Yellow River ***,in this study,we took Yan'an City,Shaanxi Province of China,as the study area,selected four typical ecosystem services,including soil conservation service,water yield service,carbon storage service,and habitat quality service,and quantitatively evaluated the spatiotemporal variation characteristics and trade-offs and synergies of ecosystem services from 2010 to 2018 using the Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)*** also analysed the relationship between the GCLC project and regional ecosystem service changes in various regions(including 1 city,2 districts,and 10 counties)of Yan'an City and proposed a coordinated development strategy between the GCLC project and the ecological *** results showed that,from 2010 to 2018,soil conservation service decreased by 7.76%,while the other three ecosystem services changed relatively little,with water yield service increasing by 0.56% and carbon storage service and habitat quality service decreasing by 0.16% and 0.14%,*** ecological environment of Yan'an City developed in a balanced way between 2010 and 2018,and the four ecosystem services showed synergistic relationships,among which the synergistic relationships between soil conservation service and water yield service and between carbon storage service and habitat quality service were *** GCLC project had a negative impact on the ecosystem services of Yan'an City,and the impact on carbon storage service was more *** study provides a theoretical basis for the scientific evaluation of the ecological benefits of the GCLC project and the realization of a win-win situation between food security and e

关键词： ecosystem services trade-offs and synergies gully control and land consolidation habitat quality Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)model Loess Plateau

Background of land Development and Opportunity of land Use Transition

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Asian Agricultural Research 2015年第12期7卷 45-48页

作者： Jie CHENG Jichang HAN Huanyuan WANG Wei TONG Shaanxi Provincial land Engineering construction Group Key Laboratory of Degraded and Unused Land Remediation Engineeringthe Ministry of Land and Resources of China Institute of Water resources and Hydro-Electric Engineering Xi'an University of Technology

In order to ease the contradiction between people and land and ensure the needs of construction land and farmland,this paper analyzes the demand and regional land development background,and points out the problems of the development of the land in China: late start of land development and utilization practices; declining back-up resources and sharply increasing costs; new resources and environmental problems brought about by development and utilization of land in some areas. This paper presents a new opportunity and strategy for land use transition: giving full play to the agricultural and geographical advantages of farming-pastoral area; carrying out water-saving technologies and intensive use of agricultural land in water-deficient areas,in order to achieve reasonable and efficient development and utilization.

关键词： Background of land development Development problems land use transition

Oxidative degradation of phenol by sulfidated zero valent iron under aerobic conditions:The effect of oxalate and tripolyphosphate ligands

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Journal of Environmental Sciences 2021年第2期33卷 82-89页

作者： Xianglong Kong Chengwu Zhang Jingyi Zhang Lishuang Xuan Chuanyu Qin key laboratory of Groundw ater resources and Environment Ministry of EducationJilin UniversityChangchun 130021China Jilin Prouindal key laboratory of Water resources and Enuironment jinin UniversityChangchun 130021China National and Local Joint Engineering laboratory for Petrochem ical Contaminated Site Control and remediation Technology Jilin UniversityChangchun 130021China

After adding either organic or inorganic ligands,sulfidated nano-zero-valent iron(Sn ZVI)was used for aerobic degradation of phenol,and the effect of the ligand species on oxidation performance was *** found that Sn ZVI hardly degraded phenol in the absence of ligand *** initiated and promoted the degradation of pollutants by Sn *** data herein show that a characteristic inorganic ligand,tripolyphosphate(TPP),is more effective in enhancing oxidation than a characteristic organic ligand *** addition to the scavenging of reactive oxidants by the organic ligand,more ferrous ion(Fe(Ⅱ))dissolution from Sn ZVI in the TPP system is another cause for the superior enhancement by the inorganic *** the oxalate system,as the sulfur content of Sn ZVI increased,the oxidation efficiency increased because Fe S shell promoted the transfer of electrons to produce more reactive oxygen species(ROS).In TPP system,the effect of sulfur content on oxidation performance is more *** Sn ZVI with low sulfur content showed poor oxidation performance compared with that of n *** experiments proved that sulfidation might weaken the complexation of TPP with surface bound Fe,which would slow down the ionic Fe(II)dissolution ***,sulfidation has the dual effects of enhancing electron transfer and inhibiting the complexation of inorganic *** addition,the mechanisms of ROS generation in different ligand systems were investigated *** showed that the critical ROS in both the oxalate and TPP systems are hydroxyl radicals,and that they are produced via one-electron activation of O_(2).

关键词： Zero valent iron Sulfidation Tripolyphosphate Oxalate Oxygen activation

Application of Big Data in the remediation of Contaminated Sites

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Asian Agricultural Research 2021年第4期13卷 39-40页

作者： Jing WEI Hui KONG Wangtao FAN Shaanxi Provincial land Engineering Construction Group Co. Ltd.Institute of Land Engineering and TechnologyShaanxi Provincial Land Engineering Construction Group Co.Ltd.Key Laboratory of Degraded and Unused Land Consolidation EngineeringMinistry of Natural ResourcesShaanxi Provincial Land Consolidation Engineering Technology Research CenterLand Engineering Technology Innovation CenterMinistry of Natural ResourcesXi an 710075China

China has large population but little *** objective conditions determine that it is required to adhere to the policy path of"cherishing,rationally utilizing land and practically protecting cultivated land".Due to the relatively immature technology in the early stage of resource development in China,extensive utilization of resources leads to serious pollution,and the situation of the restoration of contaminated sites is *** nearly 20 years of a large number of pollution,land restoration there have been a lot of achievements in research and practice,but in the era of big data development,prevention and cure of soil pollution in China,there are a number of problems in the development of science and technology,this paper put forward the corresponding recommendations and opinions for the existing problems,in order to provide decision support for using big data to repair contaminated sites.

关键词： Big data Contaminated sites Repair

Site Pollution remediation and Its Technology

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Asian Agricultural Research 2021年第5期13卷 24-25页

作者： Jing WEI Jie CHENG Wangtao FAN Shaanxi Provincial land Engineering Construction Group Co. Ltd.Institute of Land Engineering and TechnologyShaanxi Provincial Land Engineering Construction Group Co.Ltd.Key Laboratory of Degraded and Unused Land Consolidation EngineeringMinistry of Natural ResourcesShaanxi Provincial Land Consolidation Engineering Technology Research CenterLand Engineering Technology Innovation CenterMinistry of Natural ResourcesXi'an 710075China

This paper summarized the connotation of contaminated site remediation,the differences between contaminated site and brownfield,the differences between contaminated site and soil pollution and land pollution,clarified... 详细信息

关键词： Contaminated sites Brownfield Soil pollution Contaminated site remediation technology

Experience in remediation of Contaminated Sites at Home and Abroad

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Asian Agricultural Research 2021年第6期13卷 34-35,39页

作者： Jing WEI Tingting MENG Wangtao FAN Shaanxi Provincial land Engineering Construction Group Co. Ltd.Institute of Land Engineering and TechnologyShaanxi Provincial Land Engineering Construction Group Co.Ltd.Key Laboratory of Degraded and Unused Land Consolidation EngineeringMinistry of Natural ResourcesShaanxi Provincial Land Consolidation Engineering Technology Research CenterLand Engineering Technology Innovation CenterMinistry of Natural ResourcesXi'an 710075China

The selection of remediation technology for contaminated site is a key link of the remediation *** determines the success or failure of the site *** complexity of the types of contaminants in the site determines the diversity of remediation *** experience of many countries in the world shows that the use of scientific and technological means and advanced technology can more effectively carry out the work of soil protection and pollution prevention and control,and achieve obvious results.

关键词： Contaminated site Database Legislation

Effect of Gully land Reclamation on Soil Organic Matter and Carbon Contents

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Agricultural Biotechnology 2021年第3期10卷 80-82页

作者： Panpan ZHANG Tingyu ZHANG Institute of land Engineering&Technology Shaanxi Provincial Land Engineering Construction Group Co.LtdXi'an 710075China Shaanxi Provincial land Engineering Construction Group Key Laboratory of Degraded and Unused Land Consolidation EngineeringMinistry of Natural ResourcesXi'an 710075China Shaanxi Provincial land Consolidation Engineering Technology Research Center Xi'an 710075China land Engineering Technology Innovation Center Ministry of Natural ResourcesXi'an 710075China

[Objectives]This study was conducted to investigate the effects of Yan an gully land reclamation project on farmland soil organic matter and carbon contents.[Methods]Through indirect sampling and random sampling methods,soil samples were collected from six areas of Baota District,Ansai District,and Zichang County in Yan an City,before and after gully land reclamation,and the organic matter and soil organic carbon contained in them were determined.[Results]Through sampling experiments,we initially analyzed the changes of the above components in the land consolidation areas after different years and the reasons for the changes:①after the Yan an gully land reclamation project was implemented,the soil organic matter and carbon contents increased;②directing at the improvement of soil organic matter and carbon content different years after the consolidation,the improvement ranked as 5 a>2 a>1 a;and③correlation analysis showed that there was a significant positive correlation between soil organic matter and carbon contents.[Conclusions]This study provides scientific decision-making and theoretical basis for the construction of high-standard farmland in gully areas and the implementation and promotion of gully land reclamation projects.

关键词： Gully land reclamation Soil organic matter Soil organic carbon Effect

Sorption mechanisms of diphenylarsinic acid on natural magnetite and siderite:Evidence from sorption kinetics,sequential extraction and extended X-ray absorption fine-structure spectroscopy analysis

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Frontiers of Environmental Science & Engineering 2022年第9期16卷 39-52页

作者： Meng Zhu Yuhuan He Xiaobao Wei Haoran Qi Yunpeng Zhang Yijun Zhang Ruyi Yang Yongming Luo School of Ecology and Environment Anhui Normal UniversityWuhu 241002China key laboratory of Soil Environment and Pollution remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China key laboratory of Coastal Environmental Processes and Ecological remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Anhui Provincial Engineering laboratory of Water and Soil Pollution Control and remediation Anhui Normal UniversityWuhu 241002China Center of Cooperative Innovation for Recovery and Reconstruction of degraded Ecosystem in Wanjiang City Belt Anhui Normal UniversityWuhu 241002China

Diphenylarsinic acid(DPAA)is both the prime starting material and major metabolite of chemical weapons(CWs).Because of its toxicity and the widespread distribution of abandoned CWs in burial site,DPAA sorption by natural Fe minerals is of considerable *** we report the first study on DPAA sorption by natural magnetite and siderite using macroscopic sorption kinetics,sequential extraction procedure(SEP)and microscopic extended X-ray absorption fine-structure spectroscopy(EXAFS).Our results show that the sorption pseudo-equilibrated in 60 minutes and that close to 50%and 20%–30%removal can be achieved for magnetite and siderite,respectively,at the initial DPAA concentrations of 4–100 mg/*** sorption followed pseudo-secondary and intra-particle diffusion kinetics models,and the whole process was mainly governed by intra-particle diffusion and chemical *** and EXAFS results revealed that DPAA mainly formed inner-sphere complexes on magnetite(>80%),while on siderite it simultaneously resulted in outer-sphere and inner-sphere *** analysis further confirmed the formation of inner-sphere bidentate binuclear corner-sharing complexes(^(2)C)for *** of these results with previous studies suggests that phenyl groups are likely to impact the sorption capacity and structure of DPAA by increasing steric hindrance or affecting the way the central arsenic(As)atom maintains charge *** results improve our knowledge of DPAA interactions with Fe minerals,which will help to develop remediation technology and predict the fate of DPAA in soil-water environments.

关键词： Diphenylarsinic acid(DPAA) Sorption Magnetite Siderite Sequential extraction EXAFS