三江并流区地貌与环境演化研究

The Evolution of the Landform and Environment in the Region of the Three Parallel Rivers

滇西北三江并流区地理环境演化既受青藏高原隆升的影响,同时又具有自己形成演化的特点,还以纵向岭谷地貌、水系形成演化等影响本区及周边的生态环境。三江并流区经历了古新世中新世地表夷平准平原阶段,中新世末第四纪初的岭盆谷形成发展阶段(高原发育期),更新世晚期以来的现代水系峡谷、纵向岭谷和垂向气候形成等几个时期的发展,形成了现今西南纵向岭谷区的主要组成部分,导致了生态环境的通道阻隔效应,形成了独具特色的自然地理区域。

The evolution of the geographical environment in the region of the three parallel rivers （the Yangtze River, the Lancangjiang River and the Nujiang River） in northwest Yunnan is not only influenced by the rising of the Tibet Plateau, but also by its own characters. The factors, such as the high mountain-deep valley landform, the formation of the fiver system, etc. also affect the ecological environment of the region and its adjacent areas . The region of the three parallel rivers has experienced a development of several periods, which are the stage of the planation-peneplain during Paleocene-Miocene, the stage of the formation and development of mountain-basin-valley during the late Miocene （the development period of plateau） and the stage of modem fiver system-mountain-valley of gorges and vertical climate formation since late Pleistocene. The high mountain ranges and deep gorges have had separation effects on the passages of ecological environment, that makes the region from its unique characteristics.