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中文摘要：
晚新生代以来发育岷山构造带内部的岷江水系流域盆地。无论是流域盆地内的新生代沉积记录，还是其流域地貌所呈现的典型特征，都深刻指示了青藏高原东缘地区的新构造活动。文章基于数字高程模型（DEM）数据空间分析技术。利用最新获取的高精度SRTM—DEM数据，系统提取了岷江水系中上游流域汇水盆地以及67个亚流域盆地的典型地貌参数，如流域面积、河流长度、分支比等。通过对流域地貌参数以及纵向河道高程剖面等的统计分析，认为岷江水系东西两侧具有截然不同的地貌特征，东侧流域盆地主要表现为面积小、河流长度短、分支比低以及河流梯度大等特征。由于岷江水系东西两侧地层岩性的对称发育以及整个岷江流域盆地对气候因素具有同一的响应特征，所以亚流域盆地典型参数特征指示了岷江水系两侧晚新生代构造活动的差异性，反映并印证了岷江断裂东西两侧晚新生代以来的不均衡抬升。晚新生代以来岷山构造带的快速隆起以及龙门山构造带内部差异活动是造成岷江水系东侧各支流发育程度低，东西两侧亚流域差异地貌特征形成的主要原因。
英文摘要：
Compared with the remarkably flat feature of the main body of the Tibetan Plateau, geomorphology of the peripheral areas varies greatly. As an example, the eastern margin of Tibetan Plateau is more diffuse and irregular than the northern and southern ones. The Minshan Mountain along with its adjacent regions form a series of escarpments, become one of the key continental escarpments. The Minjiang drainage basin is part of this series and is adjacent to the Sichuan Basin. Knowledges of the geomorphic features of the Minjiang drainage networks and drainage sub-basins, of the stream morphology and the morphometric relation between the slope and elevation of the Minjiang drainage basin are still lacking. The recently developed digital elevation model （DEM） makes it possible to rapidly quantify the topographic characteristics of areas ranging from local drainage basins to entire continents. A DEM-based topographic analysis of mountain belts have been recently carried out along cross-sections perpendicular to the main structures of different orogens, which has shown that the Minjiang drainage basin has distinct geomorphic characteristics. Results from SRTM-DEM-determined Minjiang drainage sub-basins and channel profiles have shown that the eastern and western tributaries of the Minjiang River are obviously asymmetric. Almost all the analyzed characters （such as the areas, perimeters and total channel lengths） of the eastern sub-basins （except 32^# ,46^# and 58^#） are smaller that those of the western ones. Areas and perimeters of most the western sub-basins are more than 100km^2 and 100km respectively and the area of 15^#sub-basin even reaches up to 7202km^2 or so. The total channel lengths within many western sub-basins are above 200km. Besides the above features, the eastern streams show a little lower bifurcation ratios within 3.0 - 4. 0 ; however, these parameters of the western ones are almost between 4.1 - 5.0. Longitudinal channel profiles of western and eastern 5^th order streams indicate that t
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