植物固沙最低盖度的理论计算  

Theoretical calculation of the minimum vegetation cover for fixing sand

作　　者：王洋 王振亭 Wang Yang;Wang Zhenting(Northwest Institute of Eco-Environmental and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院西北生态环境资源研究院,甘肃兰州730000 [2]中国科学院大学,北京100049

出　　处：《中国沙漠》2025年第2期97-101,共5页Journal of Desert Research

基　　金：国家自然科学基金项目(U21A2001,42371005)。

摘　　要：人工植被作为传统防风固沙措施的核心,其最低盖度是治沙工程设计与施工的关键参数。本文利用前人建立的植被与生物土壤结皮耦合动力学模型,计算地表稳定状态下的最低植被盖度。主要结论:(1)该模型可望成为植物固沙的理论依据;(2)当输沙势高且降雨量低时,存在以植物或生物土壤结皮覆盖为主的两种稳定地表,植物固沙的最低盖度为0.02~0.12;(3)根据年降水量与输沙势,可将河西走廊沙区划分为自然恢复、植物固沙和工程固沙三类区域,以便因地制宜地制订精准固沙策略。As the core of traditional windbreak and sand fixation measures,artificial vegetation's minimum coverage is a key parameter for the design and construction of various desertification control projects.This paper utilizes the vegetation and biological soil crust coupling dynamics model established by previous researchers to calculate the minimum vegetation coverage under stable surface conditions.The main conclusions are as follows:First,this model can serve as a theoretical basis for plant sand fixation;second,in areas with high sand transport and low rainfall,there are two types of stable surfaces,where the minimum required vegetation coverage for fixing sand is 0.02-0.12;third,based on the average annual precipitation and sand transport potential,the Hexi Corridor region is divided into areas of natural recovery,plant sand fixation,and engineering sand fixation,in order to develop targeted sand control strategies that are suited to local conditions.

关 键 词：防风固沙 植被 生物土壤结皮 耦合模型 最低盖度 

分 类 号：U418.56[交通运输工程—道路与铁道工程]