半干旱地区工程创面植被恢复的温度效应研究  

A study on vegetation restoration and its effect on surface temperature on slopes destroyed by engineering in semi-arid areas

作　　者：黄树青[1] 顾卫[1] 袁帅[1,2] 林叶彬[1] 

机构地区：[1]北京师范大学地表过程与资源生态国家重点实验室,北京100875 [2]国家海洋环境监测中心,辽宁大连116023

出　　处：《中国农业大学学报》2011年第1期105-112,共8页Journal of China Agricultural University

基　　金：国家自然科学基金面上项目(30870467);交通部西部交通建设科技项目(200731822314)

摘　　要：以内蒙古赤通高速公路一处进行植被恢复的工程创面为研究对象,在植被恢复的不同时期,利用红外成像测温仪,多次进行表面温度的实地观测;在观测基础上分析了植被恢复在路域小气候中的温度效应。结果表明:对于半干旱地区的工程创面,在南坡(阳坡)使用浆砌片石护坡,会产生比裸露的自然岩石还要高的表面温度,从而加剧夏天公路路域范围的高温;而在南坡恢复植被覆盖可以显著地降低边坡表面温度,有利于局地小气候的改善,可使夏、秋、冬季南北坡之间的表面温度差下降5～10℃,改善两坡热量的不均程度。土壤水分条件对这种改善效果有明显的影响。Vegetation restoration on surfaces destroyed by engineering at a section of Tongliao-Chifeng Expressway was investigated.Temporal observations of surface temperatures were made using infrared imaging thermometer and the effect of vegetation restoration on surface temperature was analyzed.Results show that for surfaces destroyed by engineering in semi-arid area,stone slope-protection on southern slopes yielded higher surface temperature than that of bare natural rocks.This would exacerbate the high temperature if it were applied in the summer.In contrast,vegetation restoration could significantly reduce the surface temperature on southern slopes,which consequently improved the microclimate.Moreover,the difference in surface temperature between southern and northern slopes was mitigated by a decrease of 5-10 ℃ in summer,fall and winter.Furthermore,soil moisture also significantly affects surface temperature.

关 键 词：半干旱地区 工程创面 植被恢复 表面温度 温度效应 

分 类 号：P463.2[天文地球—大气科学及气象学]