湟水河流域不对称地貌与青藏高原—祁连山隆升

湟水河流域发育夷平面和不对称的分水岭、阶地、沟谷等地貌，不对称地貌主要有简单不对称沟谷、不对称分水岭和阶地式不对称沟谷。它们是由于南北两侧隆升幅度不同，在地面流水侵蚀作用下产生。地貌的不对称反映出青藏高原的隆升在大的时间尺度上是均匀的，在小尺度上是不均匀的；高原隆升到一定高度后，受印度板块侧向挤压、高原向四周扩展的应力的共同作用引起了祁连山的隆升；祁连山隆升的同时西北地区的气候开始恶化

ASYMMETRIC LANDFORM IN HUANGSHUI RIVER BASIN AND UPLIFT OF QINGHAI_TIBET PLATEAU_QILIAN MOUNTAINS

Planation surface and asymmetric landforms are developed in the Huangshui River Basin. The latter include simple asymmetric gully, asymmetric water divide and terrace type asymmetric gully which were produced by surface water erosion under differential uplifting between the southern and northern sides. The asymmetry in landform implies that the uplift of the Qinghai-Tibet plateau has been macroscopically uniform but microscopically nonuniform. When the Plateau rose to a certain altitude, the Qilian Mountains began to rise under the combined action of lateral compression by India Plate and stress due to expansion of the Plateau. The climate of the northwest region began to become vile during the uplifing of the Qilian Mountains.