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

该奖项支持合作研究， 威廉·迪特里希（William Dietrich） 加州大学伯克利分校和安娜 里约热内卢联邦大学的Coelho Netto 巴西，里约热内卢。 他们将调查 坡面和河流冲淤循环 巴西东南部的山谷。 一种机械的 寻求对这些特征的解释是因为 解释说，这些都是气候的证据 晚更新世和全新世气候的变化， 基于不充分的时间控制和有限的 了解侵蚀和径流过程。 在 建议的工作，调查人员将日期充分 层的数量，以确定是否区域 广泛的崩积层是同步的， 提供一个气候解释。 这两个小组一直在独立研究 这个问题已经有十多年了。 不同的技能 每个小组的见解将补充 另一个人的，并导致进一步的理解 侵蚀循环的原因。 年迪特里希关于崩积空洞和滑坡的研究 加州对地貌学有很大贡献 有机会研究巴西的风景 将加强这项工作。 除了有 对基础研究的重要性， 对减灾（滑坡）的影响。

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.