Dynamic Variations of Hydro-thermal Factors on Langfang-Zhuozhou Highway Roadsides in Hebei Province

LUO Han; TIAN Jia; ZHAO Ting-ning; GUO Xiao-ping

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Dynamic Variations of Hydro-thermal Factors on Langfang-Zhuozhou Highway Roadsides in Hebei Province

- Dynamic Variations of Hydro-thermal Factors on Langfang-Zhuozhou Highway Roadsides in Hebei Province
- Bulletin of Soiland Water Conservation Vol. 32, Issue 3, Pages: 125-129(2013)
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 宁夏大学农学院,宁夏,银川,750021
- 作者简介：
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- DOI：
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- Published：2013
- 稿件说明：
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LUO Han, TIAN Jia, ZHAO Ting-ning, et al. Dynamic Variations of Hydro-thermal Factors on Langfang-Zhuozhou Highway Roadsides in Hebei Province[J]. Bulletin of Soiland Water Conservation, 2013, 32(3): 125-129.
DOI：

LUO Han, TIAN Jia, ZHAO Ting-ning, et al. Dynamic Variations of Hydro-thermal Factors on Langfang-Zhuozhou Highway Roadsides in Hebei Province[J]. Bulletin of Soiland Water Conservation, 2013, 32(3): 125-129. DOI：

摘要

水热因子是影响高速公路边坡绿化的关键因子。运用自记温湿度计、自计地温计和太阳辐射表等仪器于2009年6月至2010年5月对廊涿(廊坊—涿州)高速公路阳坡、平地、阴坡和中央隔离带的太阳辐射、地温和土壤水分等水热因子进行了观测。结果表明:(1)不同地形条件下太阳辐射的日变化规律都满足二次曲线方程

地形对太阳直接辐射的影响不显著。(2)不同地形条件下地温月变化均呈"余弦曲线"变化趋势。各地形条件下

40cm的地温条件都是最好的;各深度条件下

在3—8月中央隔离带的地温最高

9—12月和1—2月阳坡的地温最高。(3)不同地形条件下土壤水分月变化均呈波浪形。各地形条件下

20—40cm的土壤水分条件都是最好的;各深度条件下

中央隔离带的土壤水分条件都是最好的。

Abstract

Hydro-thermal factors is a key factors affecting the greening on highway slope.By using self-recording hygrometer

self-recording soil thermometer and other instruments

solar radiation

soil temperature and soil moisture were observed on sunny slope

ground

shady slope and central isolation belt along the Langfang-Zhuozhou highway from June 2009to May 2010.Results show that:(1)The diurnal variations of solar radiation under different terrain conditions meet a quadratic curve.There was no significant impact of terrain on direct solar radiation.(2)The monthly variations of soil temperature are in a“cosine curve” shape under different terrain conditions.The soil temperature at 40cm depth was the highest under different terrain conditions;and the soil temperature in central isolation belt was the highest from March to August

whereas the soil temperature on sunny slope was the highest from September to December and from January to February.(3)The monthly variations of soil moisture are in a wave shape under different terrain conditions.The soil moisture in 20-40cm soil layer was the highest under different terrain conditions

and the soil moisture in central isolation belt was the highest at different depths.

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