山区复杂大流域地貌发育阶段判识方法及应用

发布时间：2018-05-13 01:05

本文选题：侵蚀循环理论 + 河流分阶段发育理论　；参考：《哈尔滨工业大学学报》2016年03期

【摘要】：为确定山区复杂大流域的地貌发育阶段及其在地震、暴雨等触发条件下的灾害区域严重程度.基于地貌循环理论和山区复杂大型流域的分阶段发育的理论,将斯特拉勒积分的计算方法与坡降指标(SL指标)结合,以确定山区复杂大流域的发育阶段.利用DEM(digital elevation model)和Arc GIS技术,计算发育阶段并据此评价崩塌滑坡在触发条件具备时的区域严重程度.在山区复河流复杂大流域内,分支小流域的斯特拉勒积分的变化点,SL指标的突变点均可以作为发育阶段的分界点;在同一发育阶段内,斯特拉勒积分值分布集中,整个发育阶段的斯特拉勒积分可以作为处于这一发育阶段的所有分支小流域发育阶段的代表值.处于幼年晚期和壮年期的流域,斯特拉勒积分处于0.450.6之间,崩塌滑坡最严重.
[Abstract]:In order to determine the geomorphologic development stage and the regional severity of disasters in mountainous area under the trigger of earthquake and rainstorm. Based on the theory of geomorphological cycle and the theory of multi-stage development of complex large watershed in mountainous areas, the calculation method of Strahler integral is combined with the sloping index (SL index) to determine the development stage of complex large watershed in mountainous area. Using DEM(digital elevation model) and Arc GIS technique, the development stage is calculated and the regional severity of landslide is evaluated when the trigger condition is available. In the complex large watershed of complex river in mountainous area, the change point of SL index and the change point of Strahler integral in branch and small watershed can all be regarded as the dividing point of development stage, and in the same development stage, the value distribution of Strahler integral is concentrated. The Strahler integral of the whole developmental stage can be used as the representative value of the development stage of all branch small watershed in this developmental stage. In the basin of late infancy and maturity, the Strahler integral is between 0.450.6 and the landslide is the most serious.
【作者单位】：西南交通大学土木工程学院;抗震工程技术四川省重点实验室道路与铁道工程抗震技术研究所;高速铁路线路工程教育部重点实验室;
【基金】：国家自然科学基金面上项目(41172321);国家自然科学基金重点项目(41030742) 中国铁路总公司科技研究开发计划课题(2013G014-A)
【分类号】：P931;P642.2

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