敦煌市文物古迹的沙漠化环境  

Impact of desertification on cultural relics in Dunhuang City

作　　者：王晓云[1] 颉耀文[1] 吴莹莹[1] 

机构地区：[1]兰州大学西部环境教育部重点实验室中德干旱环境联合研究中心,兰州730000

出　　处：《兰州大学学报（自然科学版）》2009年第3期34-38,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家科技支撑计划项目(2006BAK30B02)

摘　　要：采用人机交互目视解译的方式对敦煌市土地沙漠化的现状进行调查,将土地沙漠化图与文物古迹分布图叠置,对敦煌市文物古迹的沙漠化环境进行考察。结果显示:敦煌市沙漠化土地占全市总面积的28.49%,其中中度与重度占65%,沙漠化程度相当严重;沙漠化已经对境内的文物古迹造成严重危害或威胁,其中莫高窟和寿昌城遗址直接处于重度沙漠化地带,阳关和玉门关遗址处于中度沙漠化地带,而悬泉置遗址、西千佛洞、河仓古城、马圈湾遗址以及汉长城大部等处于轻度沙漠化地带。Based on Landsat TM images, fieldwork, cultural relics map, digital terrain model and other data, RS and GIS technologies were used to investigate the status of desertification in Dunhuang with interactive interpretation method, after the establishment of the classification system of desertification and interpretation keys. In the end, the desertification status map was produced and the impacts of desertification on cultural relics were analyzed, with the result that the area of desertification land in Dunhuang has reached 7 551 km^2, accounting for 28.49% of its total area, and desertification is distributed mainly on the south side of the Shule River; the main levels are the mid and severe ones, whose sum area accounts for 65% upwards of the total area, which implies that the statement of desertification in Dunhuang is very serious. Land desertification has caused serious damage and threat to the cultural relics. The conclusion is that Mogao Grottoes, West Qianfe Grottoes and Shouchang Ancient City are in the range of severe desertification, Yangguan Pass and Yumen Pass are in the mid level, and Xuanquanzhi Site, Hecang Ancient City, Majuanwan Site, and most part of the Han Great Wall are in the slight level.

关 键 词：文物古迹 沙漠化 遥感 地理信息系统 敦煌市 

分 类 号：TP753[自动化与计算机技术—检测技术与自动化装置]