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Land use and soil erosion during the period of prehistoric agriculture in Southeastern USA

美国东南部史前农业时期的土地利用和土壤侵蚀

基本信息

批准号：
220008901
负责人：
Dr. Markus Dotterweich
金额：
--
依托单位：
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/220008901?language=en
关键词：
Land use soil erosion during

项目摘要

The proposed research project aims to explore erosion forms, colluvial sediments and buried soils in selected 0-order and 1st-order watersheds in the Southeastern USA in order to gain, solidify, and evaluate general data on soil erosion during the Native American land use period and its respective long-term effects on the environment. The project will achieve its aims by 1) recording the stratigraphy of colluvial and alluvial sediments and buried soils, 2) mapping the extent of erosional and colluvial forms, 3) analysing chemical and physical soil and sediment properties, 4) establishing chronological control using various dating techniques including radiocarbon and OSL dating, and 5) quantifying soil erosion using hillslope sediments. The gathered data will be used to i) compare the spatial extent of prehistoric and historic erosion and the short-term and long-term pedological and geomorphological effects of subtle soil erosion against extreme events, ii) assess the feedback-mechanisms of soil erosion on soil fertility and measurable land use changes in prehistorical and historical times, and (iii) estimate the long term effects of soil erosion and sediment deposition on archaeological features. The outcome will provide a decisive step forward to gather new information on soil erosion during the Native American land use period to be able to achieve a better understanding of the long-term human induced landscape evolution in the uplands of the Southeastern USA and deliver data for a better predicting of landscape evolution to future climatic shifts in precipitation regimes.

拟议的研究项目旨在探索美国东南部选定的0级和1级流域的侵蚀形式、崩积沉积物和埋藏土壤，以获得、固化和评估美洲原住民土地使用期间土壤侵蚀的一般数据及其对环境的长期影响。该项目将通过以下方式实现其目标：1）记录崩积和冲积沉积物以及埋藏土壤的地层；2）绘制侵蚀和崩积形式的范围；3）分析土壤和沉积物的化学和物理特性；4）使用各种测年技术（包括放射性碳和光释光测年）建立年代控制；5）使用山坡沉积物量化土壤侵蚀。收集到的数据将用于 i) 比较史前和历史侵蚀的空间范围，以及微妙土壤侵蚀对极端事件的短期和长期土壤和地貌影响，ii) 评估史前和历史时期土壤侵蚀对土壤肥力和可测量土地利用变化的反馈机制，以及 (iii) 估计土壤侵蚀和沉积物沉积对考古特征的长期影响。该成果将为收集美洲原住民土地利用期间土壤侵蚀的新信息迈出决定性的一步，以便能够更好地了解美国东南部高地长期人类引起的景观演变，并提供数据，以便更好地预测未来降水状况气候变化的景观演变。