泥河湾动物群,即泥河湾早更新世化石哺乳动物群,不仅在中国,而且在东亚地区占有地质古生物重要的学术地位。泥河湾动物群化石的科学调查由巴尔博(George B. Barbour)和桑志华(émile Licent)开始于1924年9月,同年,巴尔博率先发表了...泥河湾动物群,即泥河湾早更新世化石哺乳动物群,不仅在中国,而且在东亚地区占有地质古生物重要的学术地位。泥河湾动物群化石的科学调查由巴尔博(George B. Barbour)和桑志华(émile Licent)开始于1924年9月,同年,巴尔博率先发表了“泥河湾层”(Nihowan beds)的订名,至今已经有100年的历史了,尽管泥河湾动物群的科学研究正式报告是1927年公布的。展开更多
Urban growth is a key indicator of economic development.At the same time,haphazard urban growth creates serious socioeconomic,environmental and urban land management problems.In this context,understanding the process ...Urban growth is a key indicator of economic development.At the same time,haphazard urban growth creates serious socioeconomic,environmental and urban land management problems.In this context,understanding the process of urban landscape change is important for guiding the sustainable growth of urban areas.This study analyzes the urban land changes during 1990–2018 in two metropolitan cities of Gandaki basin:Pokhara and Bharatpur.Landsat satellite images were analyzed using supervised classification methods.The results revealed that the built-up area has increased significantly by 300%in Pokhara and by nearly 500%in the Bharatpur during the past 28 years.Population growth,migration from surrounding areas due to urban facilities and the easy lifestyle in cities were found to be major determinants of urban growth within the study area.In addition,the changing urban definition and expansion of municipal boundaries are key factors for rapid urban growth.Both cities are likely to grow in the future as they are both located in areas that encompass the high levels of commercial activity and modern service facilities.The haphazard urban growth should be minimized through planning and policies for sustainable urban development.展开更多
文摘泥河湾动物群,即泥河湾早更新世化石哺乳动物群,不仅在中国,而且在东亚地区占有地质古生物重要的学术地位。泥河湾动物群化石的科学调查由巴尔博(George B. Barbour)和桑志华(émile Licent)开始于1924年9月,同年,巴尔博率先发表了“泥河湾层”(Nihowan beds)的订名,至今已经有100年的历史了,尽管泥河湾动物群的科学研究正式报告是1927年公布的。
基金The National Natural Science Foundation of China(41761144081)The Second Tibetan Plateau Scientific Expedition and Research(2019QZKK2203)+1 种基金The International Partnership Program of Chinese Academy of Sciences(131C11KYSB20160061)The Chinese Academy of Sciences-The World Academy of Sciences(CAS-TWAS)President’s Fellowship Program for Ph D Study
文摘Urban growth is a key indicator of economic development.At the same time,haphazard urban growth creates serious socioeconomic,environmental and urban land management problems.In this context,understanding the process of urban landscape change is important for guiding the sustainable growth of urban areas.This study analyzes the urban land changes during 1990–2018 in two metropolitan cities of Gandaki basin:Pokhara and Bharatpur.Landsat satellite images were analyzed using supervised classification methods.The results revealed that the built-up area has increased significantly by 300%in Pokhara and by nearly 500%in the Bharatpur during the past 28 years.Population growth,migration from surrounding areas due to urban facilities and the easy lifestyle in cities were found to be major determinants of urban growth within the study area.In addition,the changing urban definition and expansion of municipal boundaries are key factors for rapid urban growth.Both cities are likely to grow in the future as they are both located in areas that encompass the high levels of commercial activity and modern service facilities.The haphazard urban growth should be minimized through planning and policies for sustainable urban development.
