US-Brazil Cooperative Research on The Cause of Erosion and Deposition Cycles in Humid Landscapes: An Integrated Study of Process and Stratigraphy in Southeastern Brazil

美国-巴西关于潮湿景观侵蚀和沉积循环原因的合作研究：巴西东南部过程和地层学的综合研究

• 批准号: 8901918
• 负责人: William Dietrich
• 金额: $ 2万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-15 至 1992-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8901918&HistoricalAwards=false
• 关键词: US; Brazil; Cooperative; Research; Cause

This award supports cooperative research in stratigraphy to be carried on by William Dietrich of the University of California at Berkeley and Ana Coelho Netto of the Federal University of Rio de Janeiro, Brazil. They will investigate the cause of erosion and deposition cycles on hillsides and river valleys in southeastern Brazil. A mechanistic explanation for these features is sought because the interpretation that these are evidence of climatic variation of late Pleistocene and Holocene climates is based on inadequate chronologic controls and limited understanding of erosion and runoff processes. In the proposed work the investigators will date a sufficient number of layers to determine whether the regionally extensive colluvial layers are synchronous enough to provide a climatic interpretation. These two groups have been working independently on this problem for over ten years. The different skills and insights developed by each group will complement those of the other and lead to further understanding of the cause of erosion cycles in landscapes. Dietrich's work on colluvial hollows and landslides in California have contributed greatly to geomorphology and the opportunity to study the Brazilian landscape will augment this work. In addition to the significance to basic research, there are important implications for hazard (landslides) mitigation.

该奖项支持加州大学伯克利分校的William Dietrich和巴西里约热内卢联邦大学的Ana Coelho Netto在地层学方面的合作研究。他们将调查巴西东南部山坡和河谷侵蚀和沉积循环的原因。人们寻求对这些特征的机械解释，因为认为这些是晚更新世和全新世气候变化的证据的解释是基于不充分的年代学控制和对侵蚀和径流过程的有限理解。在拟议的工作中，研究人员将确定足够数量的层，以确定区域广泛的崩塌层是否足够同步，以提供气候解释。这两个小组已经在这个问题上独立工作了十多年。每个小组开发的不同技能和见解将补充其他小组的技能和见解，并进一步了解景观侵蚀循环的原因。迪特里希在加利福尼亚的崩塌空洞和山体滑坡方面的工作对地貌学做出了巨大贡献，而研究巴西景观的机会将扩大这一工作。除了对基础研究有重要意义外，对减轻灾害（滑坡）也有重要意义。