兰州市马圈沟植被覆盖度变化及对泥流发育的影响  

The Change of Vegetation Coverage and Its Effect on the Development of Mudflow in Maquangou,Lanzhou

作　　者：王化锋 韦炜 孙健 WANG Hua-feng;WEI Wei;SUN Jian(Shanxi Mining First Geological Team Co.,Ltd,AnKang 725000;Henan Geology Vocational College,Zhengzhou 450000)

机构地区：[1]陕西地矿第一地质队有限公司,陕西安康725000 [2]河南地矿职业学院,河南郑州450018

出　　处：《湖南工业职业技术学院学报》2019年第6期13-16,共4页Journal of Hunan Industry Polytechnic

基　　金：国家自然科学基金(项目编号:41972001)。

摘　　要：泥流是黄土地区一类重要的灾害地貌过程,危害极大。植被覆盖对泥流的发生有一定的抑制作用。本文以兰州市马圈沟为例,通过多期遥感数据解译分析多年来植被的覆盖变化特征及其对泥流的影响,认为:(1)形成区以高等级植被覆盖度为主,中高等级植被覆盖度次之;(2)流通区以中高等级植被覆盖度为主,中等级植被覆盖度次之。并且存在着中高等级植被覆盖度向高等级植被覆盖度的“正向转化”和向中等级植被覆盖度的“逆向转化”;(3)堆积区从最初的以中高等以及中等植被覆盖度主导的植被覆盖状况,再到以高植被覆盖度与低植被覆盖度为两个极端的方式;(4)马圈沟植被覆盖较好,在控制泥石流固体物质补给方面发挥着重要作用。Mudflow is a kind of important disaster in loess landform,which is extremely harmful.Vegetation cover has a certain inhibitory effect on the occurrence of mudflow.This article takes Maquangou of Lanzhou for instance,interpreting and analyzing the characteristics of vegetation cover change over the years and its influence on mudflow through multi-period remote sensing data,finding that:(1)in the formation area of mudflow,it is dominated by high level vegetation coverage,followed by medium-high vegetation coverage;(2)in the pass region of mudflow,the main type is medium-high level vegetation coverage,followed by the medium level vegetation coverage.Furthermore,there is a“positive transformation”of medium-high level vegetation coverage to high level vegetation coverage and a“reverse transformation”to medium-level vegetation coverage;(3)the vegetation cover condition in the accumulation area is from medium-high and high vegetation coverage dominated to two extreme ways that with high vegetation coverage or low vegetation coverage;(4)vegetation plays an important role in controlling the supply of solids in debris flows.

关 键 词：植被覆盖度 泥流发育 马圈沟 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置] Q948[自动化与计算机技术—控制科学与工程]