摘要
通过卫星象片解释、实地调查测量和查阅历史文献,本文较全面地研究了渭河盆地的水系及其所反映的现代构造运动特征。水系平面组合形态、渭河河型、水系转折及冲沟错位、河流密度、渭河河床的迁移、历史水涝灾害都一致地反映本区现代构造运动继承了第四纪以来的特点。水系历史演变又表明现代构造运动具有周期性。据水系错位和河流流向的统计分析确定本区现代构造应力场主压应力方向为N50°～60°E。本文最后还讨论了根据水系研究现代构造运动的意义以及应注意的问题。
Based on the satellite image interpretation, field survey and consulting of historic biography, this paper studies the drainage system and its implications of the modern tectonic movement in the Weihe Basin. The drainage pattern and the river type of the Weihe River, the drainage twists and gully offset, the stream density and the stream channel migration of the Weihe River and the historic flood records all consistently inticate that the modern tectonic movement of the region studied has carried forward the features of the Quaternary Evolution of drainage system. The historic evolution shows that the modern tectonic movement is periodic. According to the stream channel offset and the statistical analysis of the stream direction, the maximum principle compressive stress axis has a direction of N50-60E. In the light of the drainage system, the significance of the modern tectonic movement and some problems which should be paid more attention to are also stated in this paper.
关键词
渭河盆地
水系
现代
构造运动
Drainage System, Modern Tectonic Movement, Weihe Easin
