中文摘要：

针对黑河中游生态环境特点，基于PSR模型，选取9项能反映其生态环境脆弱性而彼此之间相互独立的评价指标体系，采用物元可拓理论和熵权法构建生态环境脆弱性的综合评判模型，对黑河中游各地区生态环境脆弱性进行了评价。结果表明：民乐县和甘州区整体生态环境脆弱性相对较轻，嘉峪关市中等，肃州区、高台县和临泽县较重，山丹县最严重；各地区对不同评价指标的敏感程度也各不相同。评价结果符合当地实际情况。

英文摘要：

Based on characteristics of the eco-environment in the middle reaches of the Heihe River and PSP model, 9 evaluation index systems that reflect ental frangibility while being isolated from each other were selected to form a model for integrated evaluation of eco-environment fragility of the studied area using the matter-elements theory and information entropy. Results indicate that Minle and Ganzhou Counties were the least, Jiayuguan city was medium, Suzhou, Gaotai and Lingze Counties were slightly high, and Shandan County was the highest in eco-environmental fragility. Sensibility of evaluation factors varied from factor to factor and from county to county. The evaluation results obtained using such a model are basically consistent with the local conditions.