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

0637108 Giosan这个探索性研究小赠款(SGER)项目将派遣伍兹霍尔海洋研究所的首席研究员Liviu Gian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年灾难性的多瑙河洪水的沉积物。美国研究人员将研究2005-2006年洪水造成的沉积层，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转化和/或干扰，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年秋季前往多瑙河三角洲进行研究。国际和平研究所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。主要合作者尤利安娜·阿尔马斯博士、斯特凡·康斯坦丁内斯库博士和阿尔弗雷德·维斯普雷梅努-斯特罗博士是布加勒斯特大学地理系的成员。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。罗马尼亚团队已经与国际和平研究所合作计划了这项拟议的研究。智力优势：多瑙河是中欧和东南欧最大的河流。沿江的水旱灾害直接影响到10个国家。参与该项目的研究人员将对2005年和2006年发生的灾难性多瑙河洪水的沉积物进行调查。调查将在战略位置进行，主要在多瑙河三角洲的顶端，其次是黑海大陆架上以河流为主的部分。这两个地点综合了整个多瑙河盆地的信号，并提供了将分析扩展到全新世晚期较长时期的机会，当时海平面变化不是沉积的重要因素。在此期间，出现了显著的气候间隔，如小冰期或中世纪暖期，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社区提供这种古重建的工具。它还将为今后将进行的多瑙河排放制度建模提供输入参数。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展。广泛影响：多瑙河三角洲是一个具有特殊生态重要性的地区，美国研究人员并没有太多关注该地区。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开展有根有据的智力合作。

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.