项目名称： 丝绸之路沿线河西段绿洲化时空过程及其驱动机制研究

项目编号： No.41471163

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 地质学

项目作者： 颉耀文

作者单位： 兰州大学

项目金额： 90万元

中文摘要： 丝绸之路沿线河西段地处丝绸之路经济带黄金段，是我国西北干旱区绿洲农业发展最早而且极具代表性的地区之一。近2000多年来，由于经历了垦殖和废弃的多次轮回，该地区绿洲的数量和位置发生了剧烈变化，尤其是近60多年来的绿洲快速扩展造成了严重的生态问题。本项目拟综合运用历史文献、考古资料、历史地图和遥感影像，在GIS技术的支持下，重建汉代以来历史时期绿洲开发利用的时空格局；结合丝绸之路的变迁，探讨其对绿洲开发的影响；利用时序遥感影像，借助自动提取和反演技术，结合实地考察和验证，按不小于1:10万的比例尺和3-5年的时间间隔，精确重建近60年来绿洲化的时空格局，同时对水库渠道、城乡聚落等主要人文景观的变化进行检测；利用时空变化模型，定量分析天然和人工绿洲各自的变化特征；分析绿洲化时空过程的主要驱动因子，揭示其驱动机制。本研究对河西地区生态文明建设和全面融入丝绸之路经济带具有重要借鉴意义。

中文关键词： 绿洲；遥感监测；景观变化；驱动机制；耦合模型

英文摘要： The Hexi Corridor sector of the Silk Road, located in the prime location of the Silk Road economic belt, is one of the earliest and representative areas of oasis agriculture in the northwest China. Because of the endless cycles between reclamation and abandonment in the past 2000 years, the areas and the locations changed sharply. Most notably, the fast extension during the past nearly 60 years had caused serious ecological problems. With the support of GIS technology, this project attempt to utilize historical document, archaeological material, historical map and remote-sensing images comprehensively, to rebuild the historic temporal-spatial patterns of oasis development and utilization from Han dynasty. Then combined with the changes of the Silk Road, its influence on the oasis development was discussed. With the help of automatic extraction and inversion technique,and combined with the field investigation, the spatial-temporal patterns in the past 60 years will be reconstructed accurately on the scale no less than 1:100000 and time interval of 3-5 years on the basis of temporal remote sensing images. Meanwhile, the changes of human landscape, such as reservoir channels, urban and rural settlements will be focused and studied. Quantitative analysis on the change characteristics of natural and artificial oases will be conducted respectively by using the temporal-spatial change model. Finally, the main ecological consequences caused by the oasis development will be illustrated, and the driving mechanism of oasis development will be revealed. This study has profound significance to Hexi Corridor in the aspects of ecological civilization construction and joining the Silk Road economic belt.

英文关键词： oasis;remote sensing monitoring;landscape change;driving mechanism;coupling model