三江源河湖沉积物的风沙侵蚀及生态修复研究

项目名称： 三江源河湖沉积物的风沙侵蚀及生态修复研究

项目编号： No.51309154

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 水利工程

项目作者： 李艳富

作者单位： 水利部交通运输部国家能源局南京水利科学研究院

项目金额： 24万元

中文摘要： 三江源区沉积了巨量河湖沉积物，随高原抬升后地表发育了脆弱的植被系统，在全球气候变化和人类活动影响下，这一区域正面临严重的风沙侵蚀和土地沙漠化威胁，区域生态环境趋于退化。开展沙漠化控制及生态修复关键问题研究对三江源区生态环境恢复具有重要的科学和现实意义。三江源区高寒环境特殊，相关研究工作存在不足：1）研究区域局限；2）定量研究少，缺乏创新性研究手段；3）微观机理研究较少。本项目拟以三江源区河流沉积物和风沙沉积物为研究对象，深入定量研究河流沉积物沙漠化控制和生态修复的内在机理及相关措施，引入植被-侵蚀动力学学科的创新理论建立沙漠化区生态评估模型。主要内容包括：1）河湖沉积物的风沙侵蚀机理和过程研究；2）三江源沙漠化控制和生态修复的内在因素及措施；3）沙漠化区生态现状及趋势的评估模型。项目研究成果可为三江源区沙漠化治理和生态恢复提供科学依据，其研究方法可为沙漠化治理和生态管理研究提供技术支持。

中文关键词： 三江源；河湖沉积物；风沙侵蚀；生态恢复；模型预测

英文摘要： A huge amount of river and lake deposits have been stored in Sanjiangyuan region during geomorphic processes. The deposit was covered with herbaceous vegetation after the plateau uplift. Due to global climate change and human activities the vegetation has been scarred with sand dunes recently. Desertification has become a serious threat to ecological environment. Therefore, research on desertification control and ecological restoration has important scientific and practical significance for ecological environment restoration in Sanjiangyuan region. Alpine environment in Sanjiangyuan region is unique, the main shortage of previous studies are threefold: 1)study area was limited; 2)quantitative research was less and innovative research methods were lack; 3)mechanism research was less. We plan to carry out a systematic field survey in typical river-lake deposits and eolian sand deposits in Sanjiangyuan region. The inner mechanism and relevant measures in desertification control and ecological restoration are planned to be further studied. Based on the new theory of vegetation-erosion dynamics, a predicting model is planned to be established to evaluate the ecological status and evolution tendency of desertification area. The contents of this study are threefold: 1) mechanism and features of eolian sand erosion pro

英文关键词： Sanjiangyuan region；River and lake deposits；Aeolian sand erosion；Ecological restoration；Model prediction