检索结果相关分组
- 鄱阳湖湿地优势植物叶片-凋落物-土壤碳氮磷化学计量特征
- 作者： 聂兰琴 吴琴 尧波 付姗 胡启武 来源：生态学报 年份：2016 文献类型 ：期刊 关键词： 养分 鄱阳湖 化学计量比 湿地
- 描述：—15cm土壤样品测定了碳(C)、氮(N)、磷(P)含量,以阐明不同物种、不同生活型间C、N、P化学计量差异,探讨化学计量垂直分异。结果表明:1)C、N、P含量变化范围分别为:叶片380.6—432.2
- 全文：—15cm土壤样品测定了碳(C)、氮(N)、磷(P)含量,以阐明不同物种、不同生活型间C、N、P化学计量差异,探讨化学计量垂直分异。结果表明:1)C、N、P含量变化范围分别为:叶片380.6—432.2
- 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.
- 鄱阳湖沉积物有机磷累积特征及其与流域发展间的响应关系
- 作者： 刘凯 倪兆奎 王圣瑞 倪才英 来源：环境科学学报 年份：2015 文献类型 ：期刊 关键词： 沉积物 鄱阳湖 有机磷 生物有效性 面源污染
- 描述：选取了鄱阳湖4个柱状沉积物,应用改进的Hedley磷形态连续提取法和有机磷(OP)酶水解技术,研究了其OP累积特征、生物有效性变化及其与流域发展间的响应关系.结果表明:1自1972年以来,鄱阳湖
- 全文：选取了鄱阳湖4个柱状沉积物,应用改进的Hedley磷形态连续提取法和有机磷(OP)酶水解技术,研究了其OP累积特征、生物有效性变化及其与流域发展间的响应关系.结果表明:1自1972年以来,鄱阳湖
- 地表覆盖数据对区域碳水通量模拟的影响：以鄱阳湖流域为例
- 作者： 朱敬芳 来源：南京大学 年份：2012 文献类型 ：学位论文 关键词： 碳水通量 模型验证 鄱阳湖流域 5套地表覆盖数据 BEPS模型
- 描述：和流域尺度的GPP、NPP和ET数据对模拟结果进行验证,定量评价地表覆盖数据对区域生态系统碳水通量模拟的影响,分析了GPP、NPP、ET和土壤水分的时空分布格局及其与降水和辐射的关系。得到了如下结论：(1
- 全文：和流域尺度的GPP、NPP和ET数据对模拟结果进行验证,定量评价地表覆盖数据对区域生态系统碳水通量模拟的影响,分析了GPP、NPP、ET和土壤水分的时空分布格局及其与降水和辐射的关系。得到了如下结论：(1
- 地表覆盖数据对区域碳水通量模拟的影响：以鄱阳湖流域为例
- 作者： 朱敬芳 来源：南京大学 年份：2012 文献类型 ：学位论文 关键词： 碳水通量 模型验证 鄱阳湖流域 5套地表覆盖数据 BEPS模型
- 描述：和流域尺度的GPP、NPP和ET数据对模拟结果进行验证,定量评价地表覆盖数据对区域生态系统碳水通量模拟的影响,分析了GPP、NPP、ET和土壤水分的时空分布格局及其与降水和辐射的关系。得到了如下结论：(1
- 全文：和流域尺度的GPP、NPP和ET数据对模拟结果进行验证,定量评价地表覆盖数据对区域生态系统碳水通量模拟的影响,分析了GPP、NPP、ET和土壤水分的时空分布格局及其与降水和辐射的关系。得到了如下结论：(1
- 地表覆盖数据对区域碳水通量模拟的影响：以鄱阳湖流域为例
- 作者： 朱敬芳 来源：南京大学 年份：2012 文献类型 ：学位论文 关键词： 碳水通量 模型验证 鄱阳湖流域 5套地表覆盖数据 BEPS模型
- 描述：和流域尺度的GPP、NPP和ET数据对模拟结果进行验证,定量评价地表覆盖数据对区域生态系统碳水通量模拟的影响,分析了GPP、NPP、ET和土壤水分的时空分布格局及其与降水和辐射的关系。得到了如下结论：(1
- 全文：和流域尺度的GPP、NPP和ET数据对模拟结果进行验证,定量评价地表覆盖数据对区域生态系统碳水通量模拟的影响,分析了GPP、NPP、ET和土壤水分的时空分布格局及其与降水和辐射的关系。得到了如下结论：(1
- 鄱阳湖湖口地区4500年来孢粉组合及古气候变迁
- 作者： 吴艳宏 羊向东 朱海虹 来源：湖泊科学 年份：1997 文献类型 ：期刊 关键词： 古气候 孢粉组合 鄱阳湖 古植被
- 描述：通过对鄱阳湖湖口梅家刘ZK_2孔沉积物的孢粉分析研究，初步恢复了4500年来湖口地区的古植被演替及古气候变迁历史．其古气候变化经历了以下几个阶段：4．5－3．8kaB．P，气候暖湿
- 全文：通过对鄱阳湖湖口梅家刘ZK_2孔沉积物的孢粉分析研究，初步恢复了4500年来湖口地区的古植被演替及古气候变迁历史．其古气候变化经历了以下几个阶段：4．5－3．8kaB．P，气候暖湿
- 鄱阳湖水文特性分析
- 作者： 徐德龙 熊明 张晶 来源：人民长江 年份：2002 文献类型 ：期刊 关键词： hydrologic composition Poyang property action Lake storage flood
- 描述：The Poyang lake is currently the largest freshwater lake in China. Hydrologic properties of this lake, including precipitation, runoff, flood, sediment transport and so on have been analyzed on basis of large amount of measurements. Variation of these properties within a year and among years and the regional distribution are explored. The encounter probability of the outflow from Poyang Lake with that from Changjiang River is computed and the detention volume of Poyang Lake is analyzed. In accordance with water balance theory, the detention storage volume of Poyang Lake and Changjiang River corresponding to the annual maximum 60-day flood volumes in 9 typical heavy flood years of 1968, 1969, 1973, 1980, 1983, 1996 and 1998 have been calculated. The detention storage capacity of both the Lake and the River ranges from 5.6 billion to 16.5 billion m\+3, 11.5 billion m\+3 at average. Among which, the detention storage capacity of Poyang Lake is 9.5 billion m\+3, accounting for 82.6%. Poyang Lake has played a very important role in detaining floods from the five rivers of the Lake system as well as floods on the river section from Changjiang to Bali. There would have more frequent and more serious flooding on the middle and lower Changjiang River, especially in the region around Hukou if there were no Poyang Lake to detain and store the floodwater.
- 全文：The Poyang lake is currently the largest freshwater lake in China. Hydrologic properties of this lake, including precipitation, runoff, flood, sediment transport and so on have been analyzed on basis of large amount of measurements. Variation of these properties within a year and among years and the regional distribution are explored. The encounter probability of the outflow from Poyang Lake with that from Changjiang River is computed and the detention volume of Poyang Lake is analyzed. In accordance with water balance theory, the detention storage volume of Poyang Lake and Changjiang River corresponding to the annual maximum 60-day flood volumes in 9 typical heavy flood years of 1968, 1969, 1973, 1980, 1983, 1996 and 1998 have been calculated. The detention storage capacity of both the Lake and the River ranges from 5.6 billion to 16.5 billion m\+3, 11.5 billion m\+3 at average. Among which, the detention storage capacity of Poyang Lake is 9.5 billion m\+3, accounting for 82.6%. Poyang Lake has played a very important role in detaining floods from the five rivers of the Lake system as well as floods on the river section from Changjiang to Bali. There would have more frequent and more serious flooding on the middle and lower Changjiang River, especially in the region around Hukou if there were no Poyang Lake to detain and store the floodwater.
- 历史时期鄱阳湖湖口长江倒灌分析
- 作者： 《地理学报》 来源：地理学报 年份：1999 文献类型 ：期刊 关键词： 倒灌 长江 鄱阳湖 沉积
- 描述：通过对ZK2孔的粘土矿物、重矿物、粒度与磁化率等多环境代用指标综合分析，并根据14C测年资料，确定约在2360aBP左右长江南摆至今湖口附近，首次发生江水倒灌鄱阳湖盆地。磁化率可作为该区江水倒灌强度的代用指标。历史时期的江水倒灌强度可划分为3个阶段2360aBP～1550aBP弱于今；1550aBP～880aBP波状递增时期，增至整个历史时期的最大值；880aBP至今强烈振荡时期，呈现6个完整的周期，周期长约为115a.
- 全文：通过对ZK2孔的粘土矿物、重矿物、粒度与磁化率等多环境代用指标综合分析，并根据14C测年资料，确定约在2360aBP左右长江南摆至今湖口附近，首次发生江水倒灌鄱阳湖盆地。磁化率可作为该区江水倒灌强度的代用指标。历史时期的江水倒灌强度可划分为3个阶段2360aBP～1550aBP弱于今；1550aBP～880aBP波状递增时期，增至整个历史时期的最大值；880aBP至今强烈振荡时期，呈现6个完整的周期，周期长约为115a.