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Reclamation-oriented spatiotemporal evolution of coastal wetland along bohai rim,China

Acta Oceanologica Sinica 2022年第9期41卷 192-204页

作者： Fan Wei Mei Han Guangxuan Han Min Wang Lixin Tian Jiqian Zhu Xianglun Kong College of Geography and Environment Shandong Normal UniversityJinan250358China Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai264003China

Coastal wetlands are located in the ecotone of interaction between the land surface and sea,and anthropogenic activities extensively interfere with these wetlands through the reclamation of large tidal wetlands and destruction of the function of the *** this study,we investigated the dynamic evolutionary characteristics of the bohai rim coastal area over the past 40 years using the Modified Normalized Difference Water Index,the fractal dimension,object-oriented classification,the land-use transfer trajectory,and regression ***,we quantified and monitored the evolution of reclamation and analyzed the correlation between reclamation and coastal wetlands based on 99 Landsat-2,-5,and-8 images(at 60 m and 30 m spatial resolution) over the period 1980–*** results are as follows.(1) The coastline of the bohai rim increased by 1 631.2 km from 1980 to2019 with a zigzag *** artificial coastline increased by 2 946.1 km,whereas the natural coastline decreased by 90%.(2) The area of man-made wetlands increased by 3 736.9 km~2,the area of construction land increased by 1 008.4 km~2,and the natural wetland area decreased by 66%.The decrease of tidal flats is the main contributor to the decrease of natural wetland area(takes account for 91.1%).Coastal areas are affected by intense human disturbance,which was taken place across a large area of tidal flats and caused the landscape to fragment and be more *** coastal zone development activities were primarily concentrated in the southern Laizhou Bay,the Yellow River Delta,the bohai Bay,the northern Liaodong Bay,and the Pulandian *** solidified shorelines and increase in sea level have resulted in intertidal wetlands decreasing and impaired wetland ecology.(3) There is a good agreement between reclamation and the size of the coastal *** land reclamation and the reduction in coastal wetland areas are significantly related to the population size,fishery output value,a

关键词： bohai rim coastal wetlands land reclamation evolutionary mechanisms coastal management

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Land use change in bohai rim: a spatial-temporal analysis

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Journal of Geographical Sciences 2001年第3期11卷 305-312页

作者： ZHU Hui-yi, LI Xiu-bin, HE Shu-jin, ZHANG Ming (Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China) Institute of Geographic Sciences and Natural Resources Research

Based on RS and GIS methods, land use information for 1985 and 1995 was acquired from TM images and analyzed. Then on both spatial and temporal aspects, this paper analyzes land use change in three provinces of Hebei, Shandong and Liaoning and two municipalities of Beijing and Tianjin in the bohai rim covering the period of 1985 to 1995. The extent, rate, areal difference and trend of various types of land use changes in the region, as well as spatial changes of major types of land use, their distribution characteristics and regional orientation are revealed. The regional characteristics of land use are elaborated, so as to provide effective policy support for sustainable land use in the area around the bohai Bay.

关键词： bohai rim land use change spatio-temporal analysis

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Spatio-temporal characteristics of rural settlements and land use in the bohai rim of China

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Journal of Geographical Sciences 2015年第5期25卷 559-572页

作者： YANG Ren LIU Yansui LONG Hualou QIAO Luyin School of Geography and Planning Sun Yat-sen University Guangzhou 510275 China Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China School of Resource Science Beijing Normal University Beijing 100875 China

Based on multiple remote-sensing image interpretation and classification, and economic and social data, this study focused on rural settlement and land use change amidst rapid urbanization. Rural settlements, spatial and temporal patterns of land use and influ- encing factors in the bohai rim were explored within 5x5 km grid cells, as per GIS spatial analysis and geostatistical analysis. Results show that the spatial distribution of rural settle- ments in the bohai rim is remarkably varied. The number of rural settlement sites in a 5x5 km grid cell exceeding 5.0 are distributed in a six-area pattern in the bohai rim; rural settlement dispersion is particularly high in agricultural regions in south Hebei and southwest Shandong, suggesting rural settlement density keeps increasing from northeast to southwest, charac- terized by high density and dispersed spatial distribution in traditional agricultural regions. Furthermore, rural settlements show dramatic spatial differences in terms of distribution and dynamic change degrees in the bohai rim. In terms of spatial distribution, rural residential land is always extensive in plains, with a high density of rural settlements, on the North China Plain in particular, and rural residential land in the south of Shandong province is also exten- sive, with most rural settlement land use areas in the 5x5 km grid cells exceeding 3 km2. However, traditional agricultural regions have underdeveloped economies, industrialization and tertiary industries, characterized by low urbanization rates, with farmers not feeling as- similated in rural or urban areas. In terms of the temporal sequence, urban expansion rapidly promotes the transformation of rural residential lands in rural-urban transitional belts of pro- vincial capital or prefecture-level city into urban lands, and in traditional rural areas, residen- tial lands are growing. The natural environment, transportation conditions, economic devel- opment and farmers＇ incomes all have

关键词： rural residential lands influence mechanism rural geography bohai rim China

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Spatiotemporal measurement of urbanization levels based on multiscale units: A case study of the bohai rim Region in China

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Journal of Geographical Sciences 2016年第5期26卷 531-548页

作者：赵敏程维明刘樯漪王楠 State Key Laboratory of Resource and Environmental Information System Institute of Geographic Sciences and Natural Resources Research CAS University of Chinese Academy of Sciences Jiangsu Center for Collaborative Innovation in Geographic Information Resource Development and Application

Urbanization is a complex process reflecting the growth, formation and develop- ment of cities and their systems. Measuring regional urbanization levels within a long time series may ensure healthy and harmonious urban development. Based on DMSP/OLS night- time light data, a human-computer interactive boundary correction method was used to ob- tain information about built-up urban areas in the bohai rim region from 1992 to 2012. Con- sequently, a method was proposed and applied to measure urbanization levels using four measurement scale units： administrative division, land-sea location, terrain feature, and geomorphological types. Our conclusions are： 1） The extraction results based on DMSP/OLS nighttime light data showed substantial agreement with those obtained using Landsat TM/ETM＋ data on spatial patterns. The overall accuracy was 97.70% on average, with an average Kappa of 0.79, indicating that the results extracted from DMSP/OLS nighttime light data were reliable and could well reflect the actual status of built-up urban areas. 2） bohai rim＇s urbanization level has increased significantly, demonstrating a high annual growth rate from 1998 to 2006. Areas with high urbanization levels have relocated evidently from capital to coastal cities. 3） The distribution of built-up urban areas showed a certain degree of zonal variation. The urbanization level was negatively correlated with relief amplitude and altitude. A high level of urbanization was found in low altitude platforms and low altitude plains, with a gradual narrowing of the gap between these two geomorphological types. 4） The measure- ment method presented in this study is fast, convenient, and incorporates multiple perspec- tives. It would offer various directions for urban construction and provide reference values for measuring national-level urbanization.

关键词： nighttime light data urbanization level multiscale units bohai rim

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Influencing Mechanism of Spatiotemporal Changes of Cultivated Land Multiple Cropping Index Applied RS and Geographical Detector Methods in the bohai rim of ChinaInfluencing Mechanism of Spatiotemporal Changes of Cultivated Land Multiple Cropping Index Appl

Influencing Mechanism of Spatiotemporal Changes of Cultivate...

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2015’全国土地资源开发整治与新型城镇化建设学术研讨会

作者： YANG Ren LIU Yansui QIAO Luyin School of Geography and Planning Sun Yat-sen University Institute of Geographic Sciences and Natural Resources Research CAS School of Resource Science Beijing Normal University

With SPOT—NDVI data and land use classification data, a remote sensing inversion was performed on multiple cropping index(MCI)in 2000, 2005 and 2010 in the bohai rim in China and the factors influencing multiple—cropping index change were explored quantitatively with a geographical detector methods model. The results showed that the multiple—cropping index from south to north reduced from 285% in plains to 75% in mountains, showing latitudinal zonality, and the multiple—cropping index was lower(35%—55%) in hills, plateaus and mountains than in plains at the same latitude, showing vertical zonality, because of the different hydrothermal conditions. During 2000—2005, the multiple—cropping index rose in plain areas, but declined in plateaus, mountains and hills. During 2005—2010, in contrast, the declined MCI started increasing, and the index in plains kept stable. It is concluded that the grain yield per unit area is a dominant factor influencing multiple—cropping index change, followed by cultivated land area per capita, labor force transfer rate and number in rural areas, agricultural production condition, agricultural modernization level, as well as geographical location. With rural—urban transition development, the subjects engaging in agricultural production are weakening. In plain regions, it is necessary to promote rural land circulation in a rational and well—organized way to develop new—type agricultural cooperative association and facilitate agricultural modernization. On the other hand, it is of significance to organize comprehensive consolidation and improvement including land, water, road, forest and villages, to strengthen high—standard farmland construction and guarantee regional grain safety and urban—rural transition development. In hills and plains, it is recommended to develop characteristic agriculture according to local conditions, adjust agricultural structure properly, and strengthen competitiveness of characteristic industries, so as to improve

关键词： Multiple cropping index Remote sensing inversion Spatiotemporal changes Influential factors bohai rim China

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Construction of the Evaluation Index System and Assessment on the Modern Agriculture Development of bohai rim

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Agricultural Science & Technology 2012年第10期13卷 2213-2218页

作者：李宝玉李刚潘月红高春雨北京克劳沃草业技术开发中心北京100102 中国农业科学院资源与区划研究所北京100081 中国农业科学院农业信息研究所北京100081

[Objetive] To make clear the regional agricultural development level.[Method] To accelerate the process of modern agricultural development of bohai rim,the assessment index system of modern agriculture was established preliminarily and the data of provinces and cities in bohai rim was evaluated and analyzed,regarding the comprehensive development level of modern agriculture as general target and the input level of modern agriculture,the output level of modern agriculture,the social development level of countryside and the sustainable development level of agriculture as grading index.[Result] The results showed that bohai rim just entered the developmental stage of modern agriculture,with the integrated index of *** from regional perspective,Beijing topped the others with the index of 0.798,which was followed by 0.694 of Tianjin,0.644 of Shandong,0.606 of Liaoning and Hebei province had the lowest value of 0.595.[Conclusion] Among all cities in this region,none of them reached at the developed level of modern *** were ten cities,which were mainly located in Shandong Province,were at the primary stage while the most of others were at the preliminary or initial stage.

关键词： Modern agriculture Assessment bohai rim

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Integration of industry cooperation development research in bohai Economic rim

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International Journal of Technology Management 2016年第1期 64-66页

作者： Xing Junwei Institute of Provincial Research CPC Liaoning Provincial Party School Shenyang Liaoning 110004

Integrated development of industrial cooperation is the core content in the bohai economic *** structure convergence of bohai economic rim mainly exist in macro three industries while it rarely exist in the manufacturing industry and other internal meso level. Learning from changing tendency, industrial structure convergence in the five provinces and municipality in the bohai Economic rim tend to be increasingly intense. For integration of industry cooperation development in bohai Economic rim, it is faced with massive separation, industrial development convergence and is restricted by institutional and ideological barriers. As strategic choice based on interest tending, integration of industry cooperation development in bohai Economic rim should be further integrated on development concept of industrial transformation to promote institutional system of the integration of industrial development and optimize the industrial layout and division system of bohai economic rim.

关键词： bohai rim industry integration

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1984-2019年环渤海滩涂遥感提取及时空演化分析

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Journal of Geographical Sciences 2023年第1期33卷 76-98页

作者：徐海珏贾奥宋晓龙白玉川 State Key Laboratoryof Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300350China Institute for Sedimentation on Riverand Coastal Engineering Tianjin UniversityTianjin 300350China

Tidal flats, a precious resource that provides ecological services and land space for coastal zones, are facing threats from human activities and climate change. In this study, a robust decision tree for tidal flat extraction was developed to analyse spatiotemporal variations in the bohai rim region during 1984–2019 based on 9539 Landsat TM/OLI surface reflection images and the Google Earth Engine(GEE) cloud platform. The area of tidal flats significantly fluctuated downwards from 3551.22 to 1712.36 km^(2) in the bohai rim region during 1984–2019, and 51.31% of tidal flats were distributed near the Yellow River Delta and Liaohe River Delta during 2017–2019. There occurred a drastic spatial transition of tidal flats with coastline migration towards the ocean. Low-stability tidal flats were mainly distributed in reclamation regions, deltas, and bays near the estuary during 1984–2019. The main factors of tidal flat evolution in the bohai rim region included the direct impact of land cover changes in reclamation regions, the continuous impact of a weakening sediment supply, and the potential impact of a deteriorating sediment storage capability. The extraction process and maps herein could provide a reference for the sustainable development and conservation of coastal resources.

关键词： bohai rim tidal flats remote sensing spatiotemporal evolution reclamation sediment supply

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Study on the Exploitation of bohai Sea Ice as Freshwater Resources

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Journal of Environmental Science and Engineering 2011年第7期5卷 805-811页

作者： Y.B. Lin Y.J.Xu W.Gu S.Yuan D.Y.Bu J.Tao State Key Laboratory of Earth Surface Processes and Resource Ecology Beo＇ing 100875 China Academy of Disaster Reduction and Emergency Management Ministry of Civil Affairs ＆ Ministry of Education Beo＇ing 100875 China College of Land and Resources China West Normal University Nanehong 637002 China National Marine Environmental Monitoring Center Dalian 116023 China

Water shortage is a major issue in northern China. With the transfer of China＇s economic center from south to north, Circum-bohai Economic Circle has gradually formed and developed as the third pole of China＇s economy after Yangtze River Delta and Pearl River Delta, the problem of water has inevitably become more and more serious. South-to-North Water Diversion and Sea Water Desalination are helpful to solve this dilemma, but some difficulties appeared during the course of the two projects. By contrast, sea ice desalination can be considered as a third way to alleviate freshwater crisis in bohai rim. Firstly, the amount of sea ice in bohai Sea is as much as 1.27 billion m3 even in normal years. Then the salinity of sea ice is only 1/4 to 1/7 as that of sea water. And furthermore, desalinized water of sea ice can meet national water quality standard for drinking. Purposely use the abundant sea ice resources as water source for industry, agriculture and living is very likely to open a new path for the solution of freshwater shortage, which can promote rapid and healthy development of Circum-bohai Economic Circle.

关键词： bohai rim south-to-north water diversion sea ice resources desalination.

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