Abstract: With ETM images photographed by Landset 7 Satellite as the basic information , the technica1 method of RS was utilized to extract eva1uation indices of vegetation cover , soil degradation , and land use type , which reflected the conditions of ecologica1 background environments. And with geologica1 information and other statistica1 materia1s as auxiliary information , the ArcGIS software was utilized to extract eva1uation indices of terrain slope and biodiversity. Based on the above indices , ana1ytica1 technique of GIS was adopted to ana1yze the ecologica1 background of Yellow River Delta. The results show that the ecologica1 background environments of the Yellow River Delta can be divided into excellent area , good area , middle area， poor area and very poor area , occupying 6% , 33%，41. 4% ，12.3% and 7.3% respectively in the overa11 of Yellow River Delta. Genera11y , the ecologica1 background environment of Yellow River Delta is worsened gradua1ly a10ng the Yellow River to inland areas.

Key words: Yellow River Delta, ecological background, eva1uation, Remote Sensing (RS) , Geographic Information System ( GIS) , highway alignment

摘要： 以黄河言之角洲地区Landset7卫星ETM影像为基本信息源，利用RemoteSensing(RS)技术方法提取反映生态本 底状况的植被覆盖、土壤退化、士地利用类型评价指标信息，并以地学信息及其他统计资料作为辅助，应用ArGIS软 件提取地形坡度、生物多样性评价指标信息。综合以上指标信息，采用GIS(GeographicInformationSystem)分析技 术，对黄河兰角洲地区生态本底进行综合评价与分析。结果表明:黄河三角洲生态本底状况可以按照等级划分为 优、良、中、差、极差，分别占研究区总面积的6%，33%，41.4%，12.3%和7.3%，在总体分布上，黄河三角洲生态本 底状况沿黄河两岸向内陆地区逐渐变差。

关键词: 黄河三角洲, 生态、本底, 评价, RS, GIS, 公路路线