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Integrated assessment of geomorphologic process dynamics in the Ethiopian Highlands using remote sensing and advanced modelling approaches

利用遥感和先进建模方法对埃塞俄比亚高地地貌过程动态进行综合评估

基本信息

批准号：
212042855
负责人：
Professor Dr. Volker Hochschild
金额：
--
依托单位：
Lehrstuhl für Physische Geographie u. Geoökologie
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 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/212042855?language=en
关键词：
Integrated assessment geomorphologic process dynamics

项目摘要

The overall objective of the project is the assessment of the present day geomorphic processes and the analysis of the complex system of the Ethiopian highlands in terms of its erosion sensitivity and its landscape evolution. The proposed project provides a comprehensive method assessing erosion and mass wasting features by new multisensoral high resolution remote sensing systems applicable in remote and data sparse regions. Moreover, advanced physically based modelling methods will be applied to analyze the systems dynamics and to assess the landscape evolution. The test site at the contact zone of the Ethiopian Plateau with the African Rift Valley has various symptoms of land degradation due to rapid land cover changes connected to growing population pressure in the last decades but also due to high geomorphologic dynamics. Therefore geomorphological field methods will be combined with the evaluation of advanced high resolution remote sensing data and new generations of digital elevation models forming an integrated mass wasting and soil erosion assessment approach. The time series data dates back to the mid 1960’s (CORONA) and will be extended by actual information on process relevant characteristics such as surface roughness, soil exposure, slope movement, vegetation disturbance and soil specific components like mineral composition and organic content. All these information will act as area wide input into distributed models. Finally the project will focus on the development of an integrated soil erosion and mass wasting assessment method with innovative physically based models and a non linear “graph theory” approach in order to understand the systems sensitivities and the landscape evolution processes. The latter ones are a prerequisite to understand human impacts already in prehistory.

该项目的总体目标是评估当今的地貌过程，并分析埃塞俄比亚高地复杂系统的侵蚀敏感性和景观演变。该项目提供了一种通过适用于偏远和数据稀疏地区的新型多传感器高分辨率遥感系统来评估侵蚀和大规模浪费特征的综合方法。此外，先进的基于物理的建模方法将用于分析系统动力学并评估景观演化。位于埃塞俄比亚高原与非洲大裂谷接触区的试验场出现了各种土地退化症状，原因是过去几十年人口压力不断增加导致土地覆盖快速变化，同时也由于高地貌动态。因此，地貌野外方法将与先进的高分辨率遥感数据和新一代数字高程模型的评估相结合，形成综合的大规模浪费和土壤侵蚀评估方法。时间序列数据可以追溯到 1960 年代中期 (CORONA)，并将通过过程相关特征的实际信息进行扩展，例如表面粗糙度、土壤暴露、坡度移动、植被干扰以及土壤特定成分（例如矿物成分和有机含量）。所有这些信息将作为分布式模型的区域范围输入。最后，该项目将侧重于开发综合土壤侵蚀和大规模浪费评估方法，采用创新的物理模型和非线性“图论”方法，以了解系统敏感性和景观演化过程。后者是了解史前人类影响的先决条件。