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Xinjiang University (2021)

The Dynamic Research of Soil Salinization in Xinjiang Oasis under the Framework of Eco-geographical Region

蒙莉娜

蒙莉娜

Titre : The Dynamic Research of Soil Salinization in Xinjiang Oasis under the Framework of Eco-geographical Region

Auteur :

Grade : Master 2021

Université : Xinjiang University

Résumé partiel
Soil salinization is a serious threat to global food security and ecological environment.As one of the frontiers in land informatization,large-scale mapping of salinization information,quantitative prediction of soil salinity information and mastering the distribution pattern of soil salinization are of profound significance for soil salinization management.In this study,we selected the Xinjiang oasis region as the study area,regional soil salinity information was predicted based on the environmental similarity between sampled and unsampled sites with the help of MODIS data,DEM-derived variables and soil property data,based on the similarity soil mapping method.First,based on the theoretical principle of eco-geographical division,the study area was divided into different sub-areas,which reduces the complexity of land cover within the divisional unit.With typical samples,complete soil-environmental knowledge can be obtained.Then,based on the actual situation of the study area,we selected and inverted land surface parameters such as vegetation index,salinity index and topographic parameters,established a quantitative prediction model of soil salinity to try to predict the surface soil salinity content of different ecological geographic regions in the study area from 2010 to 2019.Based on the exploration of the temporal and spatial evolution of soil salinization,the driving factors of soil salinization are discussed

Mots clés : Soil salinization ;Digital soil mapping ;Eco-geographical regions ;Random forest ;Remote-sensed monitoring ;

Présentation (CNKI)

Page publiée le 24 mars 2022