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Temporal variations of reference evapotranspiration and controlling factors:Implications for climatic drought in karst areas

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Journal of Groundwater Science and Engineering 2022年第3期10卷 267-284页

作者： Xiao-jiao Guo Wen-zhong Wang Cheng-xi Li Wei Wang Jian-sheng Shi Ying Miao Xing-bo Hao Dao-xian Yuan Key Laboratory of Groundwater Sciences and Engineering Ministry of Natural ResourcesInstitute of Hydrogeology and Environmental GeologyChinese Academy of Geological SciencesShijiazhuang 050061China Ecogeological Survey Center of China geological Survey China Aero Geophysical Survey and Remote Sensing Center for Natural ResourcesBeijing 100083China China University of Geosciences(Wuhan) Wuhan 430074China Key Laboratory of Karst Dynamics Institute of Karst GeologyChinese Academy of Geological SciencesGuilin 541004GuangxiChina geological Exploration Institute of Shandong Zhengyuan China Metallurgical Geology BureauJinan 250101China Hebei Coal Geology Bureau fourth geological brigade Zhangjiakou 075100HebeiChina.

Variations in reference evapotranspiration(ET_(0)) and drought characteristics play a key role in the effect of climate change on water cycle and associated ecohydrological *** accurate estimation of ET_(0) is still a challenge due to the lack of meteorological data and the heterogeneity of hydrological *** there is an increasing trend in extreme drought events with global climate change,the relationship between ET_(0) and aridity index in karst areas has been poorly *** this study,we used the Penman-Monteith method based on a long time series of meteorological data from 1951 to 2015 to calculate ET_(0)in a typical karst area,Guilin,Southwest *** temporal variations in climate variables,ET_(0)and aridity index(AI)were analyzed with the Mann-Kendall trend test and linear regression to determine the climatic characteristics,associated controlling factors of ET_(0) variations,and further to estimate the relationship between ET_(0) and *** found that the mean,maximum and minimum temperatures had increased significantly during the 65-year study period,while sunshine duration,wind speed and relative humidity exhibited significant decreasing *** annual ET_(0) showed a significant decreasing trend at the rate of−8.02 mm/***,significant increase in air temperature should have contributed to the enhancement of ET_(0),indicating an“evaporation paradox”.In comparison,AI showed a slightly declining trend of−0.0005/a during *** change in sunshine duration was the major factor causing the decrease in ET_(0),followed by wind *** had a higher correlation with precipitation amount,indicating that the variations of AI was more dependent on precipitation,but not substantially dependent on the ET_(0).Although AI was not directly related to ET_(0),ET_(0)had a major contribution to seasonal AI *** seasonal variations of ET_(0)played a critical role in dryness/wetness changes to regulate water and energy supply,which

关键词： Reference evapotranspiration Aridity index Penman-Monteith method Sunshine duration Guilin

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SATELLITE THERMAL INFRARED ANOMALOUS TEMPERATURE INCREASE AND IMPENDING EARTHQUAKE PRECURSOR

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Chinese Science Bulletin 1992年第19期37卷 1642-1646页

作者：强祖基赁常恭王宣吉胡思颐 Institute of Geology State Seismological Bureau Beijing 100029 PRC Satellite Meteorological Center.State Meteorological Administration.Beijing 100081.PRC. 7th geological brigade.Shandong Bureau of Geology and Mineral Resources.Linyi 276006 PRC.

The Changshu earthquake (M_s = 5.1) occurred at 17:57 (GMT, hereinafter) on Feb. 9, 1990, and it was sensible around Shanghai, Wuxi and some other places. The epicenter was at 31.6°N, 121°E. We predicted on Feb. 6, 1990 that there would be an earthquake with magnitude 5—6 in the south Huanghai Sea-north Jiangsu Province region, There were a

关键词： thermal infrared channel bursting anomalies of temperature increase impending earthquake precursor

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Analysis of Soil Remediation Technology for Heavy Metalcontaminated Sites in Electroplating Enterprises

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Meteorological and Environmental Research 2020年第2期11卷 73-75页

作者： Minmin ZHOU Chuanjun FU Xiaojun FAN 11^th geological Team of Zhejiang Province Wenzhou 325006China Zhejiang Nuclear Industry 262 brigade Huzhou 313000China

The advantages and disadvantages of chemical leaching,phytoremediation,in-situ/ex-situ solidification and stabilization,cement kiln co-disposal and safe landfill remediation are *** addition,the application of chemical leaching and in-situ/ex-situ solidification and stabilization technology in the treatment of heavy metal-contaminated soil in electroplating enterprises in China is introduced in detail to provide reference for the remediation of heavy metal-contaminated soil around electroplating enterprises in China.

关键词： Electroplating enterprises Heavy metal pollution Soil remediation technology

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A scalable software package for time series reconstruction of remote sensing datasets on the Google Earth Engine platform

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International Journal of Digital Earth 2023年第1期16卷 988-1007页

作者： Jie Zhou Massimo Menenti Li Jia Bo Gao Feng Zhao Yilin Cui Xuqian Xiong Xuan Liu Dengchao Li Key Laboratory for Geographical Process Analysis&Simulation of Hubei Province College of Urban and Environmental SciencesCentral China Normal UniversityWuhanPeople’s Republic of China State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingPeople’s Republic of China Faculty of Civil Engineering and Geosciences Delft University of TechnologyDelftThe Netherlands College of Resources Environment and Tourism Capital Normal UniversityBeijingPeople’s Republic of China The First geological brigade of Hubei geological Bureau HuangshiPeople’s Republic of China

Spatiotemporal residual noise in terrestrial earth observation products,often caused by unfavorable atmospheric conditions,impedes their broad *** users prefer to use gap-filled remote sensing products with time series reconstruction(TSR)*** currently available implementations of TSR to large-volume datasets is time-consuming and challenging for non-professional users with limited computation or storage *** study introduces a new open-source software package entitled‘HANTS-GEE’that implements a well-known and robust TSR algorithm,*** ANalysis of Time Series(HANTS),on the Google Earth Engine(GEE)platform for scalable reconstruction of terrestrial earth observation *** tasks can be conducted on user-defined spatiotemporal extents when raw datasets are available on *** to site-based and regional-based case evaluation,the new tool can effectively eliminate cloud contamination in the time series of earth observation *** with traditional PC-based HANTS implementation,the HANTS-GEE provides quite consistent reconstruction results for most terrestrial vegetated *** HANTS-GEE can provide scalable reconstruction services with accelerated processing speed and reduced internet data transmission volume,promoting algorithm usage by much broader user *** our knowledge,the software package is thefirst tool to support full-stack TSR processing for popular open-access satellite sensors on cloud platforms.

关键词： Time series reconstruction remote sensing Google Earth Engine HANTS gap-filling

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Geology and mineralization of the Tiegelongnan supergiant porphyry-epithermal Cu(Au, Ag) deposit(10 Mt) in western Tibet, China: A review

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China Geology 2022年第1期5卷 136-159页

作者： Huan-huan Yang Qin Wang Yan-bo Li Bin Lin Yang Song Yi-yun Wang Wen He Hong-wei Li She Li Jian-li Li Chang-cheng Liu Shi-bin Feng Tang Xin Xue-lian Fu Xin-juan Liang Qi Zhang Bei-qi Wang Yang Li MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China College of Earth Sciences Chengdu University of TechnologyChengdu 610059China No.5 geological brigade of the Tibet Bureau of Geology and Mineral Exploration and Development Golmud 816000China Chengdu Center of China geological Survey Ministry of Natural ResourcesChengdu 610081China Chinalco Tibet Mining Co. Ltd.Lhasa 850000China School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100083China

The Tiegelongnan Cu(Au,Ag)deposit in central Tibet contains more than 10 Mt of copper ranking 29 th in the *** is characterized by typical porphyry-epithermal alteration and *** order to improve the understanding of porphyry-epithermal copper deposit in Tibet,new zircon U-Pb age and sulfur isotope data along with published data in the Tiegelongnan are presented to investigate the formation and preservation ***-related intrusive rocks in the Tiegelongnan including Early Cretaceous(about 120 Ma)granodiorite porphyry and diorite porphyry are closely related to the northward subduction of Bangongco-Nujiang *** mainly comes from deep magma,and ore-forming fluid is affected by both magmatic and meteoric *** metallogenic setting of Tiegelongnan is consistent with those of Andean porphyry copper deposits in South *** cover of the Meiriqiecuo Formation volcanic rocks,Lhasa-Qiangtang collision and India-Eurasian collision have significance in the preservation and uplift of the *** formation,preservation and discovery of Tiegelongnan play an important role in exploration of ancient porphyry-epithermal deposits in Tibet.

关键词： Giant porphyry-epithermal copper deposit Mineralization and alteration Formation and preservation mechanism Tiegelongnan Duolong ore district Early Cretaceous Mineral exploration engineering Bangongco-Nujiang metallogenic belt Tibet

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HEAT FLOW MEASUREMENTS IN PANZHIHUA-XICHANG(PANXI) PALEORIFT ZONE, SW CHINA

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Chinese Science Bulletin 1987年第8期32卷 550-554页

作者：汪集暘汪缉安黄少鹏张文仁周友松金昕 Institute of Geology Academia Sinica Beijing Geophysical brigade Panxi Geological Team of Sichuan Geological Bureau Xichang Geophysical brigade Panxi Geological Team of Sichuan Geological Bureau Xichangeat flow measurements are of great significance in rift studies. The Panxi area has. been considered to be a paleorift zone of the Hercynian-Indosinian period. For a long time the geological and geophysical community are greatly concerned about the thermal state and the possibility of the existence of high heat flow in this region. And great efforts and research work have been made by joint geothermal study program of Geother

Heat flow measurements are of great significance in rift studies. The Panxi area has. been considered to be a paleorift zone of the Hercynian-Indosinian period. For a long time, the geological and geophysical community are greatly concerned about the thermal state and the possibility of the existence of high heat flow in this region. And great efforts and research work have been made by joint geothermal study program of

关键词： concerned geophysical possibility strata PALEORIFT ZONE PANXI SW CHINA mudstone Paleozoic rock

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STUDY ON CRUSTAL THICKNESS IN TAIWAN REGION——PRELIMINARY RESULTS BY 3D GRAVITY INVERSION

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Chinese Science Bulletin 1991年第11期36卷 928-931页

作者：刘光夏赵文俊吴岫云任文菊 Geophysical Prospecting brigade State Seismological Bureau Zhengzhou 450003 PRC Seismological Bureau of Hainan Province Haikou 570003PRC

Bouguer anomaly can be considered as the total sum of the attraction effects resulting from the geological bodies beneath the observational point with different scales, densities and depths. How can we extract tlae information of deep crust from Bouguer anomaly?The authors suggested using the formula of 3D positive calculation to determine the surface gravity anomaly caused by the shallow strata. After layering forward calculation, the deep residual gravity anomaly reflecting crustal structure is obtained. If we take Moho depth of 3 l km from DSS in Fujian Province as a controlling point, the crustal thickness throughout the whole region is inversed. As for the calculation and error, see Refs.

关键词： 3D gravity inversion crustal thickness.

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Dynamic Analysis of Single Pile in Liquefied Soils Considered as Newtonian Fluid

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Open Journal of Geology 2021年第2期11卷 19-37页

作者： Jinjing Sun Xinlei Zhang Zhihua Wang Hongmei Gao Lian Xu The 3rd geological brigade of Jiangsu Geology & Mineral Exploration Bureau Nanjing China Urban Underground Space Research Center Nanjing Tech University Nanjing China

Case histories have shown that the liquefaction-induced soil lateral spreading is one of the main causes of damage to pile foundations subjected to seismic loading. Post-liquefaction soil behaves similarly to a viscous fluid. This study investigated the effect of soil lateral spreading on a single pile based on fluid mechanics in which the liquefied soils were treated as Newtonian fluids. A numerical simulation on a single pile embedded in a fully saturated sandy foundation was conducted and compared with shake table tests. The lateral flow effect and the effect of shear strain rate were discussed. After liquefaction, the acceleration of the foundation shows that there are no obvious spikes and finally reaches a stable state. The presented method can predict the pile response better than p-y curve method. A parametric study was performed to explore the effect of several influence factors on pile behaviors. The results show that the pile head displacement decreases and the maximum bending moment at pile bottom increases with the increase of bending stiffness. With the same pile bending stiffness, the displacement and bending moment of pile increase with the increase of soil viscosity and acceleration amplitude.

关键词： Pile Liquefaction-Induced Lateral Spreading Newtonian Fluid CFD Method

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Study on the Themal Conductivity of Compacted Buffer/Backfill Materials

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矿物学报 2013年第S1期33卷 100-100页

作者： WANG Maoli YI Facheng WANG Zhe WAN Zhongyan WANG Chong WANG Jianwei Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory SWUST Geothermal geological brigade Tibet Bureau of Geology and Exploration

The thermal property is one of the key properties for the design of the high-level radioactive waste (HLW) repository. In this study, the thermal properties transient automatic tester (HPP-F) is uesd to study the thermal conductivity of multiphase composite buffer/backfill material including the type B-Z and B-Z-P (Here B、Z、P represents bentonite、zeolite and pyrite respectively,the same as in the following.) in different dry density and moisture conditions. The results show that for the same moisture content (dry density), thermal conductivity of specimens increases as the dry density (moisture content) increases. As a result, the type B-Z-P which is highly compacted of 1.8 g/cm3 in dry density and 17.65% in moisture content performs well, it meets the requirements of the IAEA and is easy to be compacted ,so it can be recommend as a alternative material of high level radioactive waste disposal repository buffer/backfilling materials.

关键词： high level radioactive waste compacted buffer/backfill materials thermal conductivity B-Z B-Z-P

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Accurate detection method of high-density polyethylene fi lm leakage location based on secondary electric potential difference

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Applied Geophysics 2022年第3期19卷 447-457,472页

作者： Jiang Fu-Yu Qiao Pei-Xuan Gao Li-Kun Chen Hai-Jun School of Earth Sciences and Engineering Hohai UniversityNanjing 210098China The First geological brigade of Jiangsu Bureau of Geology and Mineral Exploration Nanjing 210041China Geotechnical Engineering Department Nanjing Hydraulic Research InstituteNanjing 210029China

High-density polyethylene(HDPE)film leakage location detection is frequently accomplished using the double-electrode *** electric potential and potential difference are the main physical parameters in the double-electrode *** to the impact of the complex geoelectric environment,the electric potential and the electric potential difference are not sensitive enough to respond to minimal *** tiny leaking area cannot be precisely located using the electric potential and electric potential *** the COMSOL Multiphysics software,this study created a standard geoelectric model of the double-electrode *** calculated a new parameter—the G parameter through secondary electric potential difference—based on the response characteristics of the electric potential and the electric potential difference while the HDPEﬁlm is *** experiment demonstrates that the G parameter is more sensitive than the electric potential and electric potential difference for detecting the leaking area of HDPE *** G parameter is more effective at detecting leakage than the electric potential and electric potential *** results of this study can be used to locate HDPEﬁlm leakage areas in a landﬁll.

关键词： landfill environmental geophysics high-density polyethylene film pollution prevention

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