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Inner Mongolia Agricultural University (内蒙古农业大学) 2021

Evolution Process of Soil Erosion in Typical Watershed in Sandstone Region and Optimization of Plantation Pattern

王嘉元

Titre : Evolution Process of Soil Erosion in Typical Watershed in Sandstone Region and Optimization of Plantation Pattern

Auteur : 王嘉元

Grade : Master 2021

Université : Inner Mongolia Agricultural University (内蒙古农业大学)

Résumé partiel
Ecological protection and high-quality development of the Yellow River Basin is an important part of the construction of ecological civilization in the new era of China.The sandstone region area is located in the concentrated source area of the Yellow River coarse sand.The climate is arid,the soil is barren,and multiple types of erosion such as hydraulic,gravity,freezing and thawing occur alternately.This leads to multiple and complex erosion types,soil erosion leads to continuous deterioration of the ecological environment,single vegetation type and relatively simple configuration mode,weak resistance to natural disasters,and the ecological environment is still very fragile.The erosion situation in the watershed is not the same,governance needs and land The usable value is also different.The study on the optimization of the spatial configuration of the plantation system in this area has important practical significance for promoting the ecological and environmental protection of the river basin and the sustainable development of the economy and society.This thesis selects the Geqiugou watershed in the exposed arsenic sandstone area as the study area,and analyzes the characteristics of land use transfer and landscape pattern changes in the small watershed in the past 30 years.On this basis,the revised general soil loss equation is used as the basis for the analysis of the watershed.Estimation of erosion status,analysis of erosion changes,and finding out the problems in the layout of planted forests,using analytic hierarchy process to determine the reasonable proportion of planted forests,judging and selecting the combination of forests and tree species with strong ecological functions,and suggesting the use of erosion control The spatial pattern of soil and water conservation vegetation in small watersheds is mainly controlled,taking into account economic and ecological benefits.

Mots clés : Sandstone Region ;Land Use ;Landscape Pattern ;Soil Erosion ;Plantation Pattern Optimization ;

Présentation (CNKI)

Page publiée le 22 février 2022, mise à jour le 22 mars 2022