PREFACE

正The Abstracts of Chinese Geological Literature is edited and published by China Geological Library with an aim to provide bibliographic information to foreign geological circles on Chinese geological literature.The Abstracts is published in four numbers per annum.It gives reference s to more than one hundred Chinese periodicals and serials of     

Transitional waters: A new approach, semantics or just muddying the waters?

Estuarine, Coastal and Shelf Science has throughout its history considered a diverse range of habitats including estuaries and fjords, brackish water and lagoons, as well as coastal marine systems. Its articles have reflected recent trends and developments within the estuarine and coastal fields and this includes the changing use of well-accepted terms. The term “transitional waters” first came to prominence in 2000 with the publication of the Water Framework Directive of the European Communities [European Communities, 2000. Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in the field of water policy. Official Journal of the European Communities 43 (L327), 75 pp.], where “transitional waters” are defined as “bodies of surface water in the vicinity of river mouths which are partially saline in character as a result of their proximity to coastal waters but which are substantially influenced by freshwater flows”. The inclusion of the term transitional waters in our own aims and scope reflects the evolution of language in this subject area, encompassing tidal estuaries and non-tidal brackish water lagoons. This article reflects on some of the difficulties posed by the use of the term and its attempts to be inclusive by incorporating fjords, fjards, river mouths, deltas, rias and lagoons as well as the more classical estuaries. It also discusses the problems of including in the term river mouths discharging either into predominantly brackish areas such as the Baltic Sea, or into freshwater-poor areas bordering the Mediterranean.     

国家1：50000基础地理信息数据库更新工程

“十一五”期间,国家测绘地理信息局组织开展了全国1：50000基础地理信息数据库建设,充分利用与整合了建国以来的主要测图成果,在数据采集与生产中全面使用了国产化软件,较好地解决了数字化技术下的地理信息多源数据整合、海量数据管理、数据质量控制等诸多技术难题。建成了全国1：50000核心地形要素数据库、DEM数据库、全国10m卫星影像和局部1m航空影像数据库等,有效缓解了用户对全国范围高精度基础地理数据的需求,在国民经济建设和信息化中产生了巨大的应用效益。