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Chinese Academy of Forestry (中国林业科学研究院) 2020

Simulation Study on the Configuration of Shelter Forest in the Ulan Buhe Desert of the Yellow River

厉静文

Titre : Simulation Study on the Configuration of Shelter Forest in the Ulan Buhe Desert of the Yellow River

Auteur : 厉静文

Grade : Master 2020

Université : Chinese Academy of Forestry (中国林业科学研究院)

Résumé partiel
The natural conditions in the Ulan Buh desert of the Yellow River are harsh,and mobile sand dunes are widely spread.A large amount of sand blows into the Yellow River each year,which causes the Yellow River to be blocked and the river bed to be raised,which seriously threatens the safety of people’s lives and property,and restricts the sustainable economic development.At present,the protection forests on the Yellow River in Ulan Buh desert coast are severely aging and dead,and the preservation rate is less than 20%.It is urgently needed to renovate.Therefore,the construction of a shelter forest system based on forest belts is of great significance for mitigating wind and sand disasters and improving and restoring the good ecological environment of the Ulan Buh Desert of Yellow River.In this study,the native trees of Pinus sylvestris var.mongolica,Populus sylvestris,Xinjiang Populus sylvestris,Salix spp.,Salix matsudana,Haloxylon ammodendron,flower sticks,Nitraria sylvestris,Artemisia ordosica,and P.sylvestris were selected as the research objects in this study.Based on the analysis and research status of domestic and foreign protection forests,according to tree species composition(pure forest type,broad-leaved arbor-shrub mixed forest type and conifer-broad-tree arbor mixed forest type),forest age(low age,middle age and high age)and plant spacing(low Density,Medium Density and High Density)have designed 81 types of protection forest configuration models in 3 categories.Through wind tunnel simulation tests,the wind speed frequency distribution,wind speed flow field,and windbreak efficiency of windbreak and sandfixation forest belts of different heights and densities are analyzed.Explore the windbreaking effects of different configurations of windbreaks and sand-fixing forest belts,and The typical forest belts were screened,and the wind tunnel test was used to analyze the sand transport volume,wind erosion rate,and dust fall distribution.Based on the comprehensive wind and sand resistance experiment results,a new model of protection forest configuration in the Ulan Buh desert of the Yellow River is proposed,which provides a theoretical basis for the restoration and reconstruction of the protection forest along the Yellow River.

Mots clés : Sand blocking windbreak and sand fixation forest ;Wind tunnel experiment ;Forest belt Configuration ;Windproof effect ;Sand fixation effect ;

Présentation (CNKI)

Page publiée le 6 avril 2022