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Compound extreme inundation risk of coastal wetlands caused by climate change and anthropogenic activities in the Yellow River Delta,China

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Advances in Climate Change Research 2024年第1期15卷 134-147页

作者： Xiao-Li WANG Ai-Qing FENG Xi-Yong HOU Qing-Chen CHAO Bai-Yuan SONG Yu-Bin LIU Qi-Guang WANG He XU Yu-Xin ZHANG Dong Li Li-Jie DONG Yu GUO CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Shandong Key Laboratory of Coastal Environmental Processes Yantai 264003China China Meteorological Administration Key Laboratory for Climate Prediction Studies National Climate CentreBeijing 100081China Tongji Urban Planning Design Research Institute Shanghai 200092China School of Geography and Tourism Qilu Normal UniversityJinan 250200China China Meteorological Administration Training Centre China Meteorological AdministrationBeijing 10008China University of Chinese Academy of Sciences Beijing 100049China Marine Science and Technology College Zhejiang Ocean UniversityZhoushan 316022China

The coastal wetlands of the Yellow River Delta(YRD)in China are crucial for their valuable resources,environmental significance,and economic ***,these wetlands are also vulnerable to the dual threats of climate change and human *** substantial attention to the historical shifts in YRD's coastal wetlands,uncertainties remain regarding their future trajectory in the face of compound risks from climate change and anthropogenic *** on a range of remote sensing data sources,this study undertakes a comprehensive investigation into the evolution of YRD's coastal wetlands between 2000 and ***,the potential fate of coastal wetlands is thoroughly analyzed through the Land Use/Cover Change(LUCC)simulation using System Dynamic-Future Land Use Simulation(SD-FLUS)model and the extreme water levels projection integrated future sea-level rise,storm surge,and astronomical high tide in 2030,2050,and 2100 under scenarios of SSP1-2.6,SSP2-4.5,and *** revealed that YRD's coastal wetlands underwent a marked reduction,shrinking by 1688.72 km²from 2000 to *** decline was mostly attributed to the substantial expansion in the areas of artificial wetlands(increasing by 823.78 km2),construction land(increasing by 767.71 km²),and shallow water(increasing by 274.58 km²).Looking ahead to 2030-2100,the fate of coastal wetlands appears to diverge based on different *** the SSP1-2.6 scenario,the area of coastal wetland is projected to experience considerable *** contrast,the SSP5-8.5 scenario anticipates a notable decrease in coastal *** to the inundated area suffered from the current extreme water levels,the study projects a decrease of 6.8%-10.6%in submerged coastal wetlands by 2030 and 9.4%-18.2%by 2050 across all *** 2100,these percentages are projected to decrease by 0.4%(SSP2-4.5)and 27.1%(SSP5-8.5),but increase by 35.7%(SSP1-2.6).Results suggest that coastal wetlands in th

关键词： Climate change anthropogenic activities Compound extreme risk Coastal wetlands Yellow River Delta

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Precipitation and anthropogenic activities regulate the changes of NDVI in Zhegucuo Valley on the southern Tibetan Plateau

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Journal of Mountain Science 2024年第2期21卷 607-618页

作者： ZHAO Wanglin WANG Hengying ZHANG Huifang ZHANG Lin School of Ecology and Environment Tibet UniversityLhasa 850000China Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100101China Southwest Survey and Planning Institute of National Forestry and Grassland Administration Kunming 650000China Monitoring Center for Ecological Environment of Xizang Autonomous Region Lhasa 850000China

Whether climate change or anthropogenic activities play a more pivotal role in regulating vegetation growth on the Tibetan Plateau is still controversial.A better understanding on grassland changes at a fine scale may provide important guidance for local government policy and grassland *** two of the most reliable satellite NDVI products(MODIS NDVI and SPOT NDVI),we evaluated the dynamic of grasslands in the Zhegucuo valley on the southern Tibetan Plateau from 2000 to 2020,and analyzed its driving factors and relative influences of climate change and anthropogenic ***,the key indicators of climate change were assumed to be precipitation and *** main results were:(1)the grassland NDVI in Zhegucuo valley did not reflect a significant temporal change during the last 21 *** variation of precipitation during the early growing season(GSP)resembled that of NDVI,and the GSP was positively correlated with *** the pixel level,the partial correlation analysis showed that 37.79%of the pixels depicted a positive relationship between GSP and NDVI,while 11.32%of the pixels showed a negative relationship between temperature during the early growing season(GST)and NDVI.(2)In view of the spatial distribution,the areas mainly controlled by GSP were generally distributed in the southern part,while those affected by GST stood in the eastern part,mainly around the Zhegucuo lake where most population in Cuomei County settled down.(3)Decreasing NDVI trends were mainly occurred in alpine steppe at lower elevations rather than alpine meadow at higher elevations.(4)The residual trend(RESTREND)analysis further indicated that the anthropogenic activities played a more pivotal role in regulating the annual changes of NDVI rather than climate factors in this *** studies should pay more attention on climate extremes rather than the simple temporal ***,the influence of human activities on alpine grassland needs to be accessed and fully

关键词： anthropogenic activities Climate change Precipitation Fencing Vegetation degradation

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Assessing the impacts of climate change and anthropogenic activities on vegetation in southwest China

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Journal of Mountain Science 2022年第9期19卷 2678-2692页

作者： ZHANG Yu-xin LIU Qin WANG Yu-kuan HUANG Jing-han Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China China-Pakistan Joint Research Center on Earth Sciences CAS-HECIslamabad 45320Pakistan Yunnan Provincial Building Materials Science Research and Design Institute Co. LtdKunming 650033China

The topography and geomorphology of southwest China are complex,and the intensity of human activities not *** impact of climate change and anthropogenic activities on vegetation shows temporal and spatial ***,we used normalized difference vegetation index(NDVI)to analyze the impact of climate change and anthropogenic activities on vegetation in four provinces and municipality in the southwest China from 2000 to *** results showed that(1)NDVI increased 0.004–0.005/yr during this *** 57.74%–69.09%of the area with significant changes was found to be primarily affected by anthropogenic activities during all four seasons and the growing season,while 6.05%–10.74%and 5.09%–9.77%of the area was affected by temperature and precipitation,respectively.(2)The impact of temperature and precipitation changes were spatially *** had a positive impact during spring and summer in the northwestern ***,NDVI was positively affected in the southwestern and eastern regions,while the western region was negatively affected by *** temperatures and precipitation had the greatest impact throughout the year.(3)Returning farmland to forests and improving agricultural management demonstrated positive impacts of anthropogenic activities on the vegetation,while areas with significant negative impacts due to anthropogenic activities were located near the provincial capitals of the four provinces and *** study can provide a scientific basis for accurately identifying key ecological protection areas in Southwest China.

关键词： Climate change NDVI Southwest China Vegetation anthropogenic activities

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Time-lagged and cumulative effects of drought and anthropogenic activities on China's vegetation greening from 1990 to 2018

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International Journal of Digital Earth 2023年第1期16卷 2233-2258页

作者： Yuxi Wang Tiantian Chen Qiang Wang Li Peng Chongqing Key Laboratory of Surface Process and Environment Remote Sensing in the Three Gorges Reservoir Area Chongqing Normal UniversityChongqingPeople’s Republic of China Chongqing Field Observation and Research Station of Surface Ecological Process in the Three Gorges Reservoir Area ChongqingPeople’s Republic of China Chongqing Institute of Surveying and Monitoring for Planning and Natural Resources ChongqingPeople’s Republic of China College of Geography and Resources Sichuan Normal UniversityChengduPeople’s Republic of China

Previous studies have confirmed the time-lagged and cumulative effects of drought and anthropogenic activities on vegetation growth,but these studies focus on the time-lagged effect of drought and are poorly known how vegetation productivity responds to anthropogenic ***,based on the reconstructed Normalized Difference Vegetation Index,the Standardized Precipitation Evapotranspiration Index and land use degree comprehensive index,we diagnosed the spatiotemporal pattern of vegetation and drought,investigated time-lagged and cumulative effects of drought and anthropogenic activities over China through the month where the maximum correlation coefficient *** revealed that the browning trend of 32.21%of vegetated lands was covered by overall greening,especially northwestern *** intensified with a rate of 0.0014/*** 66.41%and 54.57%of the vegetated lands had time-lagged and cumulative response to drought,with a shorter timescales of 1–4 months,indicating the higher sensitivity of vegetation growth to *** was a U-shaped relationship between moisture conditions and vegetation response time.49.9%of China’s vegetation showed time-lagged effects to anthropogenic activities,with a longer timescales of 6–10 years,demonstrating that anthropogenic activities triggered ecological changes but vegetation ecosystems cannot keep *** accumulated and time-lagged years declined with increased land use intensity.

关键词： Vegetation greening time-lagged effect cumulative effect drought anthropogenic activities

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Characterizing the antibiotic resistance genes in a river catchment： Influence of anthropogenic activities

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Journal of Environmental Sciences 2018年第7期30卷 125-132页

作者： Haoyu Jiang Renjun Zhou Ying Yang Baowei Chen Zhineng Cheng Mengdi Zhang Jun Li Gan Zhang Shichun Zou School of Marine Sciences Sun Yat-Sen University Guangzhou 510006 China State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Graduate University of the Chinese Academy of Sciences Beijing 100039 China

Previous studies on environmental antibiotics resistance genes（ARGs） have focused on the pollution sources such as wastewater treatment plants, aquaculture and livestock farms,etc. Few of them had addressed this issue in a regional scale such as river catchment. Hence,the occurrence and abundances of 23 ARGs were investigated in surface water samples collected from 38 sites which located from the river source to estuary of the Beijiang *** them, 11 ARGs were frequently detected in this region and 5 ARGs（sul Ⅰ, sul Ⅱ, tet B,tet C, and tet W） were selected for their distribution pattern analysis. The abundances of the selected ARGs were higher in the upstream（8.70 × 10^6 copies/ng DNA） and downstream areas（3.17 × 10^6 copies/ng DNA） than those in the midstream areas（1.23 × 10^6 copies/ng DNA）, which was positively correlated to the population density and number of pollution sources. Pollution sources of ARGs along the Beijiang River not only had a great impact on the abundances and diversity, but also on the distribution of specific ARGs in the water samples. Both sul Ⅰ and sul Ⅱ were likely originated from aquaculture farms and animal farms,tet W gene was possibly associated with the mining/metal melting industry and the electric waste disposal and tet C gene was commonly found in the area with multiple pollution ***, the abundance of tet B was not particularly related to anthropogenic impacts. These findings highlight the influence of pollution sources and density of population on the distribution and dissemination of ARGs at a regional scale.

关键词： Antibiotic resistance genes anthropogenic activities Pollution sources River catchment

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Effects of the anthropogenic activities on the Morphological Evolution of the Modaomen Estuary, Pearl River Delta, China

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China Ocean Engineering 2013年第6期27卷 795-808页

作者：贾良文潘顺琪吴超羽 Coastal Ocean Research Center Sun Yat-sen University School of Engineering Cardiff University

Owing to the intensive human activities, the Modaomen Estuary has been significantly modified since 1950s, which has resulted in considerable changes of hydrodynamics and morphodynamics in the area. In this paper, the effects of the anthropogenic activities on the hydrodynamics and morphological evolution in the estuary at different stages are systematically assessed based on the detailed bathymetric data and field survey. The results show that the human activities have caused the channelization of the enclosed sea area in the Modamen Estuary;fast seaward movement of the mouth bar with high siltation;expansion of the channel volume due to channel deepening. The paper also highlights the main hydrodynamic changes in the estuary, including the rise of the water level;the distinguishing changes of tidal range before and after the 1990s （decrease and increase respectively）; as well as the increase of the divided flow ratio. It is found that reclamation is the main factor promoting the transition of nature of the estuary from runoff dominant to runoff and wave dominant, and sand mining activities are mainly to strengthen the tidal dynamic and to low the water level. The results provide useful guidance for better planning of the future developments in the estuary and further research in the area.

关键词： Modaomen Estuary anthropogenic activities morphological evolution reclamation sand mining

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Impacts of anthropogenic activities on the Changjiang(Yangtze)estuarine ecosystem(1998–2012)

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Acta Oceanologica Sinica 2015年第6期34卷 86-93页

作者： CHEN Dong DAI Zhijun XU Ren LI Daoji MEI Xuefei State Key Laboratory of Estuarine and Coastal Research East China Normal University East China Sea Environment Monitoring Center State Oceanic Administration

Estuarine ecosystem has greatly changed in the recent decades due to anthropogenic perturbations in the Changjiang Estuary. Change patterns and impact factors were analyzed based on the continuous data in relation to the Changjiang estuarine ecosystem from 1998 to 2012. The results showed significant decreases in plankton species and annual output of Coilia nasus, Coilia mystus. Furthermore, species and biomass of benthos showed abrupt change in 2003, downward before that and upward after that. It was noted that, Eriocheir sinensis, a high value commercial fish, had an annual production increase of 97%. Reduction of riverine nutrients, especially dissolved silicate （DSI） loads into the estuary could contribute to the decline in BaciUariophyta species. Dredging and dumping works of the North Passage led to the decreases in regional plankton species. However, the species reproduction and releasing projects could restore the estuarine ecosystem through increasing the output of E. sinensis, as well as species and biomass of benthos.

关键词： ecosystem anthropogenic activities Changjiang (Yangtze) Estuary

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anthropogenic activities and the Degradation of the Environmental Quality in Poor Neighborhoods of Abidjan,Cote d’Ivoire:Abia Koumassi Village

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Journal of Environmental Protection 2013年第10期4卷 1099-1107页

作者： S.Loko K.E.Ahoussi Y.B.Koffi A.M.Kouassi J.Biemi Laboratoire de chimie et de Microbiologie Universite Technologique et Tertiaire Loko(UTTLOKO)AbidjanCote d’Ivoire Unite de Formation et de Recherche(UFR)des Sciences de la terre et des Ressources Minieres(STRM) Universite de CocodyCocodyCote d’Ivoire Departement des Sciences de la Terre et des Ressources Minieres(STeRMi) Institut National Polytechnique Felix Houphouet Boigny(INP-HB)YamoussoukroCote d’Ivoire

This study deals with the degradation of the quality of the water environment in the village of Abia Koumassi, due to the pollution that has risen in Abidjan. The method used in this study is based on piezometric measurements, the physico-chemical and microbiological analysis. The results were processed using statistical and hydrochemical methods. The groundwater in the village is shallow, with a piezometric average level 0.55 m. The groundwater flows from the north of the village to the south. The Water resources have a neutral pH that varies between 6.8 and 7.43. Water temperature varies from 27.7°C to 29.8°C. The Water is highly mineralized, with electrical conductivity ranging from 585 μS/cm to 1310 μS/cm. The groundwater contains high levels of nitrate (116.81 mg·L-1) greater than the WHO standard for drinking water. High levels of Metallic Trace Elements (Ni, Zn, Co, Cr, Pb, Fe, Cu and Cd) are found in the water. Microbiological analysis shows that the water contains important levels of Escherichia coli, faecal streptococci, Clostridium perfringens and thermo tolerant coliform. These microorganisms create microbiological pollution in the water from the area. The Water resources of the village are facing a recent faecal pollution of human origin. This pollution comes from anthropogenic activities taking place in the area.

关键词： anthropogenic activities Environment Pollution Water Sanitation and Quality

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Influence of anthropogenic activities of Groundwater from Hand Dug Wells within the Precarious Settlements of Southern Abidjan,Cote d’Ivoire:Case of the Slums of Anoumabo(Marcory)and Adjouffou(Port-Bouet)

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Journal of Water Resource and Protection 2013年第4期5卷 427-439页

作者： Isimemen Osemwegie Yei Mairie-Solange Oga Kouassi Ernest Ahoussi Yao Blaise Koffi Amani Michel Kouassi Jean Biemi Technical University of Darmstadt DarmstadtGermany Universite Felix Houphouet-Boigny de Cocody-Abidjan Unite de Formation et de Recherche(UFR)des Sciences de la Terre et des Ressources Minieres(STRM)AbidjanCote d’Ivoire Institut National Polytechnique Felix Houphouet-Boigny(INP-HB) Departement des Sciences de la Terre et des Ressources Minieres(STeRMi)Laboratoire du Genie Civildes Geosciences et des Sciences GeographiquesYamoussoukroYamoussoukroCote d’Ivoire

This study aims to examine the quality and quantity of the groundwater resources from hand-dug wells, within two of these slums—Anoumabo (Marcory) and Adjouffou (Port-Bouet), both located in the southern part of the city. Twenty-eight representative groundwater samples were collected from different domestic wells within the study area. In addition, water samples were collected from the adjoining surface water bodies—the ébrié lagoon and the Atlantic Ocean. The water samples were also tested for microbial indicators of fecal contamination using the conventional membrane filtration method. The groundwater samples are alkaline to acidic with pH ranging between 4.4 and 8.1. They are slightly mineralized with electrical conductivity, EC values ranging between 388 μS/cm and 1494 μS/cm. The dominant hydrochemical facies are Na-Cl, Na-SO4, Ca-Cl and Ca-SO4. Although, majority of the water samples have anions and cations concentrations conforming to the World Health Organization, alerting levels of nitrate contamination was recorded in the area. About 67 percent of the tested samples have nitrate values greater than the recommended WHO limit for drinking water (NO3 > 50 mg/ι). Exceeding high nitrate concentrations in drinking water have been medically proven to be detrimental to infant health. Microbial analyses reveal bacterial contamination at varying degrees in all of the water wells. The presence of these microbial organisms in the samples is also indicative of the presence of some other disease causing pathogens, responsible for sicknesses like cholera, diarrhea, typhoid, etc. The water wells located within Anoumabo have relatively higher levels of groundwater contaminants in comparison to those located within Adjouffou. This is obviously due to the poor well designs and prevalent unhygienic and poor sanitary habits of its inhabitants. These waters though completely unsuitable for drinking and domestic purposes, can be used for irrigation purposes with very little or no

关键词： anthropogenic activities Assessment Groundwater Pollution Well

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A Study on anthropogenic activities Influencing Flood Vulnerability in Ala Riverfront Residential Areas of Akure, Nigeria

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Journal of Geographical Research 2020年第4期3卷 45-54页

作者： Owoeye J.O. Abe F.S. Olasemojo R.O. Department of Urban and Regional Planning School of Environmental TechnologyFederal University of TechnologyAkure.PMB 704Akure Ondo StateNigeria

This research investigates anthropogenic activities influencing flood vulnerability in Ala riverfront residential areas of Akure,Nigeria with a view to identifying area susceptible to flood hazard in the river basin and to suggest possible mitigation *** respect to data gathering for the study,265 questionnaires which amounted to 1%of the research population were administered using simple random *** from the survey revealed erection of buildings on riparian land and indiscriminate dumping of wastes into river bodies as factors responsible for the blockage of river channels and *** also exposed resident’s poor dispositions to flood forecasts and non-adherence to other management *** study concludes by recommending public enlightenment campaign to reducing denizen’s vulnerability to flood *** is the need for provision of waste management and drainage facilities as well as regular dredging of the watercourse to stimulate its absorptive capacity in the event of heavy *** further suggests creation of artificial lake as natural basin to collect huge volume of water discharged from all watersheds leading to the ***,stringent efforts of environmental and town planning officers are needed to enforce total compliance to all intended management regulations to check the menace.

关键词： anthropogenic activities Flood vulnerability Riparian land Ala riverfront Akure

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