Susceptibility to gravitational processes due to land cover change in the Río Chiquito-Barranca del Muerto subbasin(Pico De Orizaba Volcano, México)

作     者：alanis-anaya rocío marisol legorreta-paulin gabriel mas jean francois granados-ramirez guadalupe rebeca 

作者机构：college of geographyfaculty of philosophy and lettersnational autonomus university of mexico(unam)Mexico City 04510Mexico department of physical geographyinstitute of geographynational autonomus university of mexico(unam)Mexico City 04510Mexico center for research in environmental geographynational autonomus university of mexico(unam)Mexico City 58190Mexico 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2017年第14卷第12期

页      面：2511-2526页

核心收录：

学科分类：07[理学] 

基　　金：PAPIIT IN102115 project program Basic Science SEP-CONACYT(167495) CONACYT scholarship program(328294) Postgraduate Program in Geography,UNAM 

主　　题：Gravitational processes susceptibility Land cover change Multi-criteria assessment Pico de Orizaba volcano 

摘      要：instability associated Land cover change can lead to slope by accelerating erosive processes with agriculture, forestry, and infrastructure. The Rio Chiquito-Barranca del Muerto subbasin has experienced an increase in land cover change due to government programs and the establishment of agricultural and urban areas. The aim of this study was to provide a model to map the susceptibility to gravitational processes along sites where anthropogenic land cover change has occurred. The method was based on the stratification of the subbasin according to landforms and cartographic variables. These variables were used in a multi- criteria assessment to assign weights according to their contribution to the onset of new gravitationalprocesses. Those weights were used to create a susceptibility map based on a weighted linear sum. The accuracy of the resulting map was validated in an error matrix with a random stratified design based on susceptibility classes per landform. The results produced a map of areas with susceptibility to gravitational processes due to land cover change; this susceptibility is very high in the undifferentiated pyroclastic slope and limestone mountain, where it derives not only from anthropogenie effects on natural vegetation cover, but also from steep slopes, weathered materials, low apparent density, high erosivity, and previous gravitational processes. The results support other studies that concluded that loss of vegetation is a triggering factor in the formation of gravitational processes, but also show that excessive reforestation can increase gravitational processes.