检索结果相关分组
- 鄱阳湖流域史前人类遗址时空分布及其环境响应
- 作者： 徐佳佳 贾玉连 马春梅 朱诚 吴立 李育远 王鑫浩 来源：地理学报(英文版) 年份：2016 文献类型 ：期刊 关键词： expanded northward geographic records 环境响应 鄱阳湖流域 climatic ancient Holocene southeast
- 描述：The temporal-spatial geographic distribution of archaeological sites and its feature between 10.0–2.8 ka BP(ka BP= thousands of years before 0 BP, where “0 BP” is defined as the year AD 1950) were determined, based on GIS spatial analysis in the Poyang Lake Basin. The relationship between geographic distribution of sites of different periods under subsistence existence of ancient civilizations, climate and environmental change was investigated. The results revealed numerous archaeological sites of the Neolithic Age(10.0–3.6 ka BP). The sites were mainly located in the northern part of the Poyang Lake Basin, a hilly and mountainous area with many river terraces suitable for the development of human civilization. The number of archaeological sites rapidly increased during the Shang and Zhou dynasties(3.6–2.8 ka BP) and spread widely on the floodplains of the middle and lower reaches of Ganjiang River and onto the west, south, and southeast beach areas of the Poyang Lake. Holocene records of climate change suggested that it was possible that climate fluctuations had a great impact on human evolution in the study area. Before 3.6 ka BP, westward and northward expansion of Neolithic cultures in the Poyang Lake watershed occurred under the background of climate amelioration(becoming warmer and wetter). The ancient people lived in the hilly areas with high elevation. The simple mode of a fishing and gathering economy was mostly suited to this area in the early Neolithic Age. The scope of human activities was expanded and cultural diversity developed in the late Neolithic Age. However, with population growth and increasing survival pressure in a dry-cold climatic stage after 3.6 ka BP, this simple living mode had to be abandoned, and various forms of economy, the majority being agriculture, were developed on flood plains of the lower reaches of numerous rivers around Poyang Lake. This promoted flourishing of the Bronze culture of South China.
- 全文：The temporal-spatial geographic distribution of archaeological sites and its feature between 10.0–2.8 ka BP(ka BP= thousands of years before 0 BP, where “0 BP” is defined as the year AD 1950) were determined, based on GIS spatial analysis in the Poyang Lake Basin. The relationship between geographic distribution of sites of different periods under subsistence existence of ancient civilizations, climate and environmental change was investigated. The results revealed numerous archaeological sites of the Neolithic Age(10.0–3.6 ka BP). The sites were mainly located in the northern part of the Poyang Lake Basin, a hilly and mountainous area with many river terraces suitable for the development of human civilization. The number of archaeological sites rapidly increased during the Shang and Zhou dynasties(3.6–2.8 ka BP) and spread widely on the floodplains of the middle and lower reaches of Ganjiang River and onto the west, south, and southeast beach areas of the Poyang Lake. Holocene records of climate change suggested that it was possible that climate fluctuations had a great impact on human evolution in the study area. Before 3.6 ka BP, westward and northward expansion of Neolithic cultures in the Poyang Lake watershed occurred under the background of climate amelioration(becoming warmer and wetter). The ancient people lived in the hilly areas with high elevation. The simple mode of a fishing and gathering economy was mostly suited to this area in the early Neolithic Age. The scope of human activities was expanded and cultural diversity developed in the late Neolithic Age. However, with population growth and increasing survival pressure in a dry-cold climatic stage after 3.6 ka BP, this simple living mode had to be abandoned, and various forms of economy, the majority being agriculture, were developed on flood plains of the lower reaches of numerous rivers around Poyang Lake. This promoted flourishing of the Bronze culture of South China.
- 鄱阳湖特大桥36号主墩钢围堰施工专项方案
- 作者： 郭跃 来源：四川水泥 年份：2016 文献类型 ：期刊 关键词： 预防措施 围堰施工工序 鄱阳湖特大桥
- 描述：桥梁工程建设中,围堰的施工技术是工程施工中的重点和难点,本文结合一个实际的桥梁施工方案,对它的施工设计和整体部署进行介绍,对该项工程的围堰施工的具体流程进行分析,做好各个方面的预防工作,为本项工程能够顺利、安全完工提供参考资料。
- 全文：桥梁工程建设中,围堰的施工技术是工程施工中的重点和难点,本文结合一个实际的桥梁施工方案,对它的施工设计和整体部署进行介绍,对该项工程的围堰施工的具体流程进行分析,做好各个方面的预防工作,为本项工程能够顺利、安全完工提供参考资料。
- 鄱阳湖入湖主要污染物浓度变化趋势分析
- 作者： 贾娟娟 罗勇 张健 陈晓峰 肖南娇 来源：江西科学 年份：2015 文献类型 ：期刊 关键词： 趋势分析 水质 主要污染物
- 描述：通过同步监测2010-2014年入湖监测断面水质,分析了化学需氧量、氨氮、总磷和总氮4项污染物的变化趋势。结果表明,除总磷外,化学需氧量、氨氮和总氮3项污染物浓度总体上均有不同程度的上升趋势,应引起有关部门的重视。
- 全文：通过同步监测2010-2014年入湖监测断面水质,分析了化学需氧量、氨氮、总磷和总氮4项污染物的变化趋势。结果表明,除总磷外,化学需氧量、氨氮和总氮3项污染物浓度总体上均有不同程度的上升趋势,应引起有关部门的重视。
- 鄱阳湖沙区农户对土地利用变化的影响
- 作者： 王盼盼 郑林 曹昀 来源：中国水土保持 年份：2014 文献类型 ：期刊
- 描述：鄱阳湖沙区农户对土地利用变化的影响
- 鄱阳湖五河人湖口浮游藻类及营养现状评价
- 作者： 陈格君 周文斌 胡春华 来源：湖北农业科学 年份：2013 文献类型 ：期刊
- 描述：鄱阳湖五河人湖口浮游藻类及营养现状评价
- 行走鹤乡——鄱阳湖鸟类保护区考察记
- 作者： 子岚 来源：科学教育与博物馆 年份：2011 文献类型 ：期刊
- 描述：行走鹤乡——鄱阳湖鸟类保护区考察记
- 鄱阳湖棉区棉花枯萎病发生规律及防治对策
- 作者： 刘新稳 李贵珍 黄道千 孙亮庆 杨绍群 柯兴盛 来源：棉花科学 年份：2012 文献类型 ：期刊 关键词： 棉花枯萎病 专化型 棉花生育期 棉种 棉花新品种 产棉区 蕾铃期 其他杀菌剂 尖孢镰刀菌 纤维品质
- 描述：枯萎病是棉花一种常见的病害,病原为真菌,名尖孢镰刀菌(萎蔫专化型),主要危害棉花的维管束等部位。中国是1934年从美国引进棉种时传入的,目前已传遍全国各产棉区,成为棉花主要病害之一。枯萎病具有毁灭性,一旦发生很难根治,发病轻者其发育迟缓,结铃较少,吐絮不畅,纤维品质和产量均有下降,发病[1
- 全文：枯萎病是棉花一种常见的病害,病原为真菌,名尖孢镰刀菌(萎蔫专化型),主要危害棉花的维管束等部位。中国是1934年从美国引进棉种时传入的,目前已传遍全国各产棉区,成为棉花主要病害之一。枯萎病具有毁灭性,一旦发生很难根治,发病轻者其发育迟缓,结铃较少,吐絮不畅,纤维品质和产量均有下降,发病[1
- 中国的百慕大：探秘鄱阳湖老爷庙水域
- 作者： 李瑶 来源：国家人文地理 年份：2010 文献类型 ：期刊
- 描述：中国的百慕大：探秘鄱阳湖老爷庙水域
- 洪涝灾害影响鄱阳湖产粮区夏粮收购
- 作者： 中国人民银行上饶市中心支行调查统计科 来源：金融统计分析报告 年份：2010 文献类型 ：期刊
- 描述：洪涝灾害影响鄱阳湖产粮区夏粮收购