(SGER) Sedimentary Markers-Disastrous Danube Floods in Romania 2005-2006

[06371038]这项探索性研究（SGER）小额资助项目将派遣伍兹霍尔海洋研究所的首席研究员Liviu Giosan博士和博士后研究员Andrew Ashton博士前往罗马尼亚的多瑙河三角洲地区，调查最近发生的2005年和2006年多瑙河灾难性洪水的沉积物。美国研究人员将研究2005-2006年洪水形成的沉积物层，以更好地了解三角洲沉积物中的洪水指标。随着时间的推移，最近洪水的沉积物将被物理和生物过程改变和/或扰乱，随着时间的推移，沉积物将更难清楚地识别。因此，研究人员打算在2006年秋天前往多瑙河三角洲进行他们的研究。PI正在与几位在多瑙河三角洲有经验的罗马尼亚科学家合作。Drs。主要合作者Iuliana Armas、Stefan Constantinescu和Alfred Vespremeanu-Stroe是布加勒斯特大学地理学院的成员。他们一直在监测洪水，并将与布加勒斯特大学的博士、硕士和学士学位学生一起参加实地研究。罗马尼亚的研究小组与PI一起计划了这项拟议的研究。知识价值：多瑙河是中欧和东南欧最大的河流。黄河沿岸的洪涝和干旱灾害直接影响到10个国家。参与该项目的研究人员将调查2005年和2006年多瑙河灾难性洪水的沉积物。该调查将在战略要地进行，主要是多瑙河三角洲的顶点，其次是黑海大陆架上以河流为主的部分。这两个地点整合了整个多瑙河盆地的信号，并提供了将分析扩展到晚全新世更长的时期的机会，当时海平面变化不是沉积的重要因素。在这段时间里，发生了诸如小冰河期或中世纪温暖期等重要的气候间隔，可能导致了河流水文的变化。了解现代洪水的沉积标志将为这一古重建提供工具。它还将为今后将进行的多瑙河排放制度的建模提供输入参数。此外，深入了解多瑙河的洪水沉积将有助于了解泛滥平原和前三角洲的沉积和发育。更广泛的影响：多瑙河三角洲是一个具有特殊生态重要性的地区，它没有引起美国研究人员的太多关注。2005-2006年的洪水对该地区造成了毁灭性的破坏，更好地了解河流的洪水行为具有科学和社会价值。该项目支持两名美国初级研究人员与国际合作伙伴进行有充分基础的智力合作。

0637108GiosanThis Small Grant for Exploratory Research (SGER) project will send the principal investigator Dr. Liviu Giosan and postdoctoral researcher Dr. Andrew Ashton from Woods Hole Oceanographic Institute to the Danube Delta region in Romania to survey the deposits of the recent disastrous Danube floods of 2005 and 2006. The U.S. researchers will study the sediment beds resulting from the 2005-2006 floods to obtain a good understanding of flood indicators in sediments of the delta. The deposits of the recent flood will be transformed and/or disturbed by physical and biological processes as time goes by, and as more time elapses, the deposits will be harder to clearly identify. Thus, the researchers intend to travel to the Danube Delta to conduct their research in Fall 2006.The PI is collaborating with several Romanian scientists who have experience in the Danube Delta. Drs. Iuliana Armas, Stefan Constantinescu and Alfred Vespremeanu-Stroe, the main collaborators, are members of the Faculty of Geography at the University of Bucharest. They have been monitoring the flood and will participate in the field research together with doctoral, master's and bachelor's degree students from the University of Bucharest. The Romanian team has worked with the PI to plan the proposed research.Intellectual Merit:The Danube River is the largest river in the Central and Southeastern Europe. Flood and drought hazards along the river directly affect 10 countries. The researchers involved in this project will survey the deposits of the recent disastrous Danube floods of 2005 and 2006. The survey will take place at strategic positions primarily at the apex of the Danube delta and secondarily on the river-dominated sector on the Black Sea continental shelf. Both of these locations integrate the signal of the entire Danube basin and provide the opportunity to extend the analysis to the longer period of the late Holocene, when the sea level change was not an important factor in sedimentation. During this time significant climatic intervals such as the Little Ice Age or Medieval Warm Period occurred, probably leading to changes in the river hydrology. Understanding the sedimentary markers of modern floods will provide the community with tools for this paleoreconstruction. It will also provide input parameters for modeling of the Danube discharge regime that will be undertaken in the future. In addition, in-depth understanding of the flood sedimentation of the Danube will contribute to the knowledge of floodplain and prodelta sedimentation and development.Broader Impact:The Danube Delta is an area of special ecological importance, which had not attracted much attention from U.S. researchers. The floods of 2005-2006 were devastating to the area, and better understanding of the flooding behavior of the river has both scientific and societal value. This project supports two U.S. junior researchers in a well-founded intellectual collaboration with international partners.