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1940s以来中国大陆岸线变化的趋势分析 被引量:7
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作者 毋亭 侯西勇 《生态科学》 CSCD 2017年第1期80-88,共9页
基于1940s—2014年六个时相的中国大陆岸线数据,利用基于剖面计算的岸线变化速率,在全国、省域与区域三个尺度定量分析中国大陆岸线变化的时空特征,结论如下:1)1940s以来,中国大陆岸线总体以扩张趋势为主;大规模扩张趋势主要发生于淤泥... 基于1940s—2014年六个时相的中国大陆岸线数据,利用基于剖面计算的岸线变化速率,在全国、省域与区域三个尺度定量分析中国大陆岸线变化的时空特征,结论如下:1)1940s以来,中国大陆岸线总体以扩张趋势为主;大规模扩张趋势主要发生于淤泥质海岸,空间分布较为集中和连续,而后退趋势主要表现为砂砾质海岸的侵蚀后退,空间分布较为分散;2)在10省市区层面,岸线均是扩张与后退并存,但以扩张趋势为主,其中,天津、河北、上海、江苏岸线的不稳定性最高;3)在32个区域层面,除海州湾至江苏废黄河口岸段,绝大多数区域的岸线均以扩张趋势为主;黄河三角洲、莱州湾南岸、江苏废黄河口至长江三角洲岸段岸线动态度较高;4)近70年来,辽河三角洲至莱州湾南岸岸线持续向海扩张,1990年后,虽然扩张规模有所减小,强度却显著增加;长江三角洲至杭州湾岸段,岸线扩张势头强劲且1990年后更趋增强;杭州湾以南岸线,扩张强度始终较为平稳。总的来说,从位移方向的角度分析中国大陆岸线变化的时空特征,尤其是对扩张与后退热点区域的识别,将有助于海岸带区域环境与生态问题的防治、资源的优化配置以及经济社会的可持续发展。 展开更多
关键词 中国大陆岸线 端点速率 线性回归速率 加权线性回归速率 岸线扩张 岸线后退 1940s-2014
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A College Student's Rural Journey: Early Sociology and Anthropology in China Seen through Fieldwork on Sichuan's Secret Society 被引量:2
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作者 Di Wang 《Frontiers of History in China》 2017年第1期1-31,共31页
This paper focuses on the investigators of rural society in the Republican period, specifically research made through fieldwork on the Gowned Brothers (or, Paoge) in 1940s Sichuan. It takes up one such investigator,... This paper focuses on the investigators of rural society in the Republican period, specifically research made through fieldwork on the Gowned Brothers (or, Paoge) in 1940s Sichuan. It takes up one such investigator, Shen Baoyuan--a student at Yenching University; her youthful work never became published or recognized. The present study reveals how the pioneers of Chinese sociology and anthropology, who called themselves "rural activists," tried to understand rural China. It argues that the developments in those fields in China of the 1920s and 1940s made it possible for us today to have a better understanding of the contemporary rural problems. The investigators played an important role in the Rural Construction and Rural Education Movements in Republican China. They show us how Western sociology and anthropology were localized in order to answer "Chinese questions" and to solve "Chinese problems." As source material, these investigations have given us rich records, which in turn have become precious sources and historical memories of rural China's past. 展开更多
关键词 rural activists SOCIOLOGY Yenching University SICHUAN 1920s-1940s secret society
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