清江上游河流发展过程与袭夺模式  

River Development Process and Capture Model in Upper Qingjiang Basin

作　　者：田单[1,2] 李长安[1] 

机构地区：[1]中国地质大学地球科学学院,武汉430074 [2]巴东县国土资源局,湖北巴东444300

出　　处：《地质科技情报》2014年第1期80-84,共5页Geological Science and Technology Information

基　　金：国家自然科学基金项目(40971008);中国地质调查局地质调查项目(1212011121142)

摘　　要：河流如何切开分水岭而实现袭夺过程一直是河流地貌学所关注的问题。清江上游河谷的发育过程提供了一个完整的关于河流袭夺的新模式。清江袭夺模式即位于分水岭两侧的相邻盆地水系首先依靠地下水贯通形成地下通道,尔后伏流管道系统不断扩大,最后随着洞穴顶板逐渐塌陷导致地下河出露完成地表水系的袭夺过程,并形成险峻的峡谷地貌。清江袭夺模式有助于解释喀斯特地区河流在切过分水岭时留下的特殊河谷地貌形态,是一种新的河流袭夺方式。How does the river flow through the watershed to complete river capture process is a hotspot topic in geomorphology research. The development process of river valley in Qingiiang upstreanl fully presents a new comprehensive model about river capture. The Qingiiang River capture model interprets the process that the underground river piping is firstly formed under the water divided by ground water, after- ward underground passage is created which connect the rivers located at both sides of the watershed. With the spreading of the underground passage system, the river located at high base level of erosion flows into the low river through underground rivers. The river capture process is complete when underground river is exposed because of the cave roof collapsing. The Qingiiang River capture model is a new example of river capture and contributes to explain the special valley formed by a river cutting through the watershed in karst region.

关 键 词：清江上游 袭夺模式 地下河 岩溶塌陷 

分 类 号：P512.31[天文地球—地质学]