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Attribution analysis of groundwater level fluctuation in the Xinxiang section of the Lower Yellow River's suspended river after the construction of the Xiaolangdi Reservoir

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Journal of Geographical Sciences 2024年第7期34卷 1348-1375页

作者： LI He PING Jianhua LENG Wei MEI Xuemei ZHANG Min LIU Jiaqi School of Water Conservancy and Transportation Zhengzhou University College of Ecology and Environment Zhengzhou University Geothermal and Ecological Geology Research Center Zhengzhou University Institute of Geology and Geophysics CAS

The clear identification and quantification of the factors affecting groundwater systems is crucial for protecting groundwater resources and ensuring safety in agricultural production.The Lower Yellow River （LYR） is a suspended river that replenishes groundwater continuously due to clear differences in the water head,especially in the Xinxiang section.Since its construction,the Xiaolangdi Reservoir has reversed the LYR’s deposition.To accurately determine the factors influencing the groundwater level （GWL）,the study area was divided into five subzones based on hydrogeology.A dynamic factor model （DFM）,variational mode decomposition （VMD）,and a multiple linear regression model were used to identify and quantify the factors influencing the GWL.The impact of the suspended river on the groundwater before and after the construction of the Xiaolangdi Reservoir was examined.The results show that:（1） The rate of decrease in the GWL was 8.53×10–4m/month,and the rate of decrease in the Yellow River water level （RWL） was 4.63×10–4m/month.（2） Mountain front recharge （MFR）(scale=3 months) and precipitation （scale=9 months） were the dominant factors in subzones I and II,accounting for more than 40%of the fluctuation in the GWL.Subzone III was dominated by exploitation （scale=7 months） and precipitation （scale=12months）,accounting for 28.43%,and 23.44%of changes in the GWL,respectively.In subzone IV,agricultural irrigation （scale=12 months） was the major factor,accounting for32.47%of GWL changes,while in subzone V,the RWL （scale=12 months） accounted for52.52%of these changes.（3） The Xiaolangdi Reservoir has increased the lateral seepage of the suspended river and altered the inter-annual distribution.The results of this study can provide a valuable reference for controlling groundwater overexploitation and ensuring water supply security.

关键词： groundwater level influencing factor dynamic factor analysis Xiaolangdi Reservoir Lower Yellow River lateral seepage of the Yellow River

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Influence of groundwater level changes on the seismic response of geosynthetic-reinforced soil retaining walls

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2022年第11期23卷 850-862页

作者： Fei-fan REN Qiang-qiang HUANG Xue-yu GENG Guan WANG Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Department of Geotechnical EngineeringTongji UniversityShanghai 200092China School of Engineering University of WarwickCoventry CV47ALUK School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai 200093China

Geosynthetic-reinforced soil retaining walls(GSRWs)have been widely used in civil engineering projects.However,as the climate changes,extreme weather conditions and natural hazards are likely to become more frequent or intense,posing a huge threat to the stability of GSRWs.In this paper,the effect of groundwater level fluctuations on the seismic response of GSRWs is investigated.First,a dynamic numerical model was established and validated through centrifugal shaking-table test results.Using the established numerical model,the seismic response of GSRWs under four different groundwater level conditions was then investigated,i.e.,an earthquake occurring at a low groundwater level(Case LW),an earthquake occurring when the groundwater level rises(Case RW),an earthquake occurring at a high groundwater level(Case HW),and an earthquake occurring when the groundwater level drops(Case DW).The results show that the GSRW in Case DW has the worst seismic stability because of the drag forces generated by the water flowing to the outside of the GSRW.For Case RW,deformation of the GSRW under earthquake forces was prevented by the drag forces generated by the water flowing to the inside of the GSRW and the water pressure acting on the outside of the facing,giving the GSRW the best seismic stability in this case.Compared with Case LW,the seismic stability of a GSRW in Case HW is worse,because the high groundwater level will generate excess pore-water pressure during an earthquake.On this basis,we provide engineering design suggestions to be considered by practitioners.

关键词： Geosynthetic-reinforced soil retaining walls(GSRWs) groundwater level Earthquake Stability analysis

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Spatial distribution of supra-permafrost groundwater in the Qinghai-Tibet Engineering Corridor using inversion models

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Advances in Climate Change Research 2024年第1期15卷 31-41页

作者： Yu GAO Ming-Tang CHAI Wei MA Yu-Tao GAO State Key Laboratory of Frozen Soils Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 73000China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China School of Civil and Hydraulic Engineering Ningxia UniversityYinchuan 750021China

Supra-permafrost groundwater(SPG)is a key factor that causes damage to highways and railways in the Qinghai-Tibet Engineering Corridor(QTEC).It is difficult to monitor SPG in the field due to their complex formation mechanisms and movement characteristics.Traditional single-site field monitoring studies limit the spatial and temporal precision of SPG spatial distribution.To determine the moisture content of shallow soils and the SPG distribution along the QTEC,this work employed the temperature vegetation dryness index and remote sensing models for groundwater table distribution models.The accuracies of the models were validated using mea-surements obtained from different sites in the corridor.In the permafrost zones of the QTEC,72%,22%and 6%of the SPG were located at depths of 0.5-1,1 m,respectively.Meanwhile,79.4%of the area along the Qinghai-Tibet Highway(QTH)(Xidatan-Tanggula)section contained SPG.In these sections with SPG,37.9%have an SPG table at depths of 0.5-0.8 m.This study preliminarily explored the SPG distribution in the QTEC with a 30 m resolution.The findings can help improve the spatial scale of SPG research,provide a basis for the analysis of the hydrothermal mechanisms,and serve as a guide in the assessment of operational risks and road structure designs.

关键词： Dryness index Landsat Soil moisture groundwater level Qinghai-Tibet Engineering Corridor

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groundwater level prediction of landslide based on classification and regression tree

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Geodesy and Geodynamics 2016年第5期7卷 348-355页

作者： Yannan Zhao Yuan Li Lifen Zhang Qiuliang Wang Key Laboratory of Earthquake Geodesy Institute of Seismology China Earthquake Administration Wuhan Base of Institute of Crustal Dynamics China Earthquake Administration

According to groundwater level monitoring data of Shuping landslide in the Three Gorges Reservoir area, based on the response relationship between influential factors such as rainfall and reservoir level and the change of groundwater level, the influential factors of groundwater level were selected. Then the classification and regression tree（CART） model was constructed by the subset and used to predict the groundwater level. Through the verification, the predictive results of the test sample were consistent with the actually measured values, and the mean absolute error and relative error is 0.28 m and 1.15%respectively. To compare the support vector machine（SVM） model constructed using the same set of factors, the mean absolute error and relative error of predicted results is 1.53 m and 6.11% respectively. It is indicated that CART model has not only better fitting and generalization ability, but also strong advantages in the analysis of landslide groundwater dynamic characteristics and the screening of important variables. It is an effective method for prediction of ground water level in landslides.

关键词： Landslide groundwater level Prediction Classification and regression tree Three Gorges Reservoir area

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Physiological Responses of Three Contrasting Plant Species to groundwater level Changes in an Arid Environment

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Journal of Integrative Plant Biology 2006年第5期48卷 520-526页

作者： Li Zhuang Ya-Ning Chen Xinjiang Institute of Ecology and Geography the Chinese Academy of Sciences Urumqi 830011 China

Plants growing on both sides of the Tarim River in western China serve as a natural barrier containing the deserts and protecting the oasis, and their growth is greatly affected by water conditions In their local habitat. We studied the physiological responses of three different types plants （i.e. Populus euphratlca Oliver, Tamarix ramosissima L., and Apocynum venetumas Linn） to changing groundwater levels by analyzing changes in chlorophyll, soluble sugar, proline （Pro）, malondialdehyde （MDA）, superoxlde dlsmutase （SOD）, peroxidase （POD）, indoleacetic acid （IAA）, giberellic acid, abscisic acid （ABA） and cytokinin （CK）. Relationships between these physiological characteristics and groundwater levels were analyzed in order to assess the drought tolerance of the three plant species based on the values of average membership function. We found that MDA, SOD and ABA were more susceptible to changes in groundwater level, followed by POD, IAA and CK. Among the three plant species, Populus euphratica responded physiologically less to changing groundwater level than T. ramosissima and A. venetumas.

关键词： Apocynum venetumas groundwater level membership function method Populus euphratica Tamarix ramosissima Tarim River.

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Effects of groundwater level on vegetation in the arid area of western China

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China Geology 2021年第3期4卷 527-535页

作者： Ge Song Jin-ting Huang Bo-han Ning Jia-wei Wang Lei Zeng Xi’an University of Science and Technology Xi’an 710054China Xi’an Center China Geological SurveyXi’an 710054China

At present,investigation about the relationship between the change of groundwater level and vegetation mostly focuses on specific watersheds,i.***.limited in river catchment scale.Understanding the change of groundwater level on vegetation in the basin or large scale,be urgently needed.To fill this gap,two typical arid areas in the west of China(Tarim Basin and Qaidam Basin)were chosen the a typical research area.The vegetation status was evaluated via normalization difference vegetation index(NDVI)from 2000 to 2016,sourced from MODN1F dataset.The data used to reflect climate change were download from CMDSC(http://***).groundwater level data was collected from monitor wells.Then,the relationship of vegetation and climate change was established with univariate linear regression and correlation analysis approach.Results show that:Generally,NDVI value in the study area decreased before 2004 then increased in the research period.Severe degradation was observed in the center of the basin.The area with an NDVI value>0.5 decreased from 12%to 6%between 2000 and 2004.From 2004 to 2014,the vegetation in the study area was gradually restored.The whole coverage of Qaidam Basin was low.And the NDVI around East Taigener salt-lake degraded significantly,from 0.596 to 0.005,2014 and 2016,respectively.The fluctuation of groundwater level is the main reason for the change of surface vegetation coverage during the vegetation degradation in the basin.However,the average annual precipitation in the study area is low,which is not enough to have a significant impact on vegetation growth.The annual average precipitation showed an increase trend during the vegetation restoration in the basin,which alleviates the water shortage of vegetation growth in the region.Meanwhile,the dependence of surface vegetation on groundwater is obviously weakened with the correlation index is−0.248.The research results are of some significance to eco-environment protection in the arid area of western China.

关键词： NDVI groundwater level Climate change Arid land Hydrogeological survey engineering Tarim Basin Qaidam Basin Western China

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Effects of urbanization on groundwater level in aquifers of Binh Duong Province,Vietnam

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Journal of groundwater Science and Engineering 2021年第1期9卷 20-36页

作者： Luong Van Viet Institute for Environmental Science Engineering and ManagementIndustrial University of Ho Chi Minh CityHo Chi Minh CityVietnam

The purpose of this paper was to assess the impact of urbanization on the groundwater level(GWL)in aquifers of Binh Duong(BD)Province.The research method is to analyze the trend of GWL,the recharge capacity of surface over time and the relationship between them.The data of the GWL used in the study are the average values in the dry and rainy seasons of 35 observation wells from 2011 to 2018,which are in Pleistocene and Pliocene aquifers.The ability to recharge groundwater from the surface in this study was represented by the curve number(CN),a parameter used in hydrology for calculating direct runoff or infiltration from rainfall.The land use data to identify the CN was analyzed from the Landsat images.The results show that besides over-exploitation,the change of surface characteristic due to the urbanization development process is also the cause of the GWL decline.The analysis of seasonal GWL data shows that the increase in impervious surface area is the cause of GWL decline in the Pleistocene aquifer,which is more evident in the rainy season than in the dry season.The statistical results also show that in the rainy season and in shallow aquifers,a higher CN change can be found with the wells that had a remarkable GWL decline compared to the remaining wells.

关键词： Urbanization Land use change Impervious surface Curve number groundwater level

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Physiological response of natural plants to the change of groundwater level in the lower reaches of Tarim River, Xinjiang

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Progress in Natural Science:Materials International 2004年第11期 39-47页

作者： CHEN Yaning*, LI Weihong, CHEN Yapeng, ZHANG Hongfeng and ZHUANG Li(Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China)

Based on the analysis of the three-year (2000-2002) monitoring data of the four times intermittent stream water conveyance to the lower reaches of Tarim River where the stream flow was dried up for more than 30 years and the measurement of PRO, SOD and POD in plants collected from 24 vegetation plots, it is concluded that the stream water conveyance plays an important role in lifting groundwater level. The groundwater nearby the watercourse was raised from 5～8 m in depth before the stream water conveyance to 2.5～5 m after stream water conveyance. The physiological response of Phragmites communis, Tamarix spp. and Populus euphratica to the change of groundwater is sensitive and represents a grads change obviously. The growth of the plants in the lower reaches of Tarim River is stressed by drought to various degrees. Lengthways, the drought stress exposed to the plants increases with groundwater depth from the upper sections to the lower sections; and breadthwise, the drought stress exposed to the plants is increased with the increase of distance away from the river channel of stream intermittent water releases and of the groundwater depth. Combining the field investigation and the analysis of the plots, it is considered that the stress groundwater depths for the Phragmites communis, Tamarix spp. and Populus euphratica are 3.5 m, 5 m and 4.5 m respectively.

关键词： stream water conveyance groundwater level natural plants physiological index Tarim River.

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Reliability Analysis of Loess Landslide Considering the Change of groundwater level

Reliability Analysis of Loess Landslide Considering the Chan...

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作者： Yan Liang Guanghong He Aidi Huo Key Laboratory of Education Ministry on Highway Engineering of Special Region School of HighwayChang'an University Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region Ministry of EducationSchool of Environmental Science & EngineeringChang'an University

The reliability analysis of landslide is very important for the early warning and prevention of landslide.In this paper,Monte-Carlo method is used to analyze groundwater level,the variation coefficient of c and φ,and paleosol layer impact on the reliability of landslide in Jingyang South tableland.The reliability analysis results are as follows:（1） With the increase of groundwater level,the probability of landslide failure increases and the safety factor decreases.When the depth of groundwater level is 61 m,the failure probability is 2.46%,and the average safety factor is 1.166;when the groundwater depth is 31.6 m,the average safety factor is 0.791,and the failure probability is 98.94%.（2） The coefficient of variation "δ" is positively related to the failure probability of landslide,and negatively related to the reliability index.When δ＜0.05,the increasing trend of failure probability and the decreasing trend of reliability index are most significant.（3） Paleosol layer has certain influence on Reliability.When the groundwater depth is less than 35.3 m,the average safety factor with paleosol layer is less than that without paleosol,but the failure probability is higher.When the groundwater depth is more than 35.3 m,it shows the opposite relationship.

关键词： loess landslide reliability analysis Monte-Carlo method coefficient of variation groundwater level paleosol

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Determination of water balance equation components in irrigated agricultural watersheds using SWAT and MODFLOW models:A case study of Samalqan plain in Iran

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Journal of groundwater Science and Engineering 2022年第1期10卷 44-56页

作者： Shima Nasiri Hossein Ansari Ali Naghi Ziaei Water science and Engineering College of AgricultureFerdowsi University of MashhadIran

Increasing water demands,especially in arid and semi-arid regions,continuously exacerbate groundwater as the only reliable water resources in these regions.Samalqan watershed,Iran,is a groundwater-based irrigation watershed,so that increased aquifer extraction,has caused serious groundwater depletion.So that the catchment consists of surface water,the management of these resources is essential in order to increase the groundwater recharge.Due to the existence of rivers,the low thickness of the alluvial sediments,groundwater level fluctuations and high uncertainty in the calculation of hydrodynamic coefficients in the watershed,the SWAT and MODFLOW models were used to assess the impact of irrigation return flow on groundwater recharge and the hydrological components of the basin.For this purpose,the irrigation operation tool in the SWAT model was utilized to determine the fixed amounts and time of irrigation for each HRU(Hydrological Response Unit)on the specified day.Since the study area has pressing challenges related to water deficit and sparsely gauged,therefore,this investigation looks actual for regional scale analysis.Model evaluation criteria,RMSE and NRMSE for the simulated groundwater level were 1.8 m and 1.1%respectively.Also,the simulation of surface water flow at the basin outlet,provided satisfactory prediction(R^(2)=0.92,NSE=0.85).Results showed that,the irrigation has affected the surface and groundwater interactions in the watershed,where agriculture heavily depends on irrigation.Annually 11.64 Mm3 water entered to the aquifer by surface recharge(precipitation,irrigation),transmission loss from river and recharge wells 5.8 Mm3 and ground water boundary flow(annually 20.5 Mm^(3)).Water output in the watershed included ground water extraction and groundwater return flow(annually 46.4 Mm^(3))and ground water boundary flow(annually 0.68 Mm^(3)).Overally,the groundwater storage has decreased by 9.14 Mm3 annually in Samalqan aquifer.This method can be applied to simulate the effects of surface water flu

关键词： groundwater level SWAT Model MODFLOW Model Recharge Irrigation

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