中国农业气象

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考虑地形条件下山区日照和辐射的GIS模型研究

黄晚华;帅细强;汪扩军;   

  1. 湖南省气象科学研究所,湖南省气象科学研究所,湖南省气象科学研究所 长沙410007,长沙410007,长沙410007
  • 出版日期:2006-04-10 发布日期:2006-04-10
  • 基金资助:
    中国气象局“基于GIS的湖南农业气候分析服务系统”

A Study on GIS-based Model of Sunlight and Radiation in View of Terrain in Mountain Areas

HUANG Wan-hua,SHUAI Xi-qiang,WANG Kuo-jun (Hunan Meteorological Research Institute,Changsha 410007,China)   

  • Online:2006-04-10 Published:2006-04-10

摘要: 考虑坡度、坡向等地形要素对日照和辐射的影响,针对东中部山区坡度较平缓的特点,改进了坡面日照、辐射计算公式并建立了模型,利用本模型、Citystar和500m×500m网格的地理数据,计算湖南省年日照时数、年太阳总辐射。结果表明:考虑坡度、坡向等地形要素,比过去仅考虑经纬度、海拔利用GIS分析气候要素更能反映山区光资源分布及气候特点,该模型更具有实际应用价值。

关键词: 日照, 辐射, GIS模型, 地形

Abstract: Considering the influence of terrain factors such as gradient and slope direction on sunlight and radiation,a GIS model which fits to mountain areas in the East and Central China was established through ameliorating the formula of slope sunlight and radiation calculation.Annual sunlight times and solar global radiation in Hunan Province were calculated using this model,based on its 500m×500m grid geographical data with Citystar GIS.The results showed that the sunlight resources and their characteristics in the mountain areas could be well explained because some terrain factors such as gradient and slope direction were taken into account.The model had been proved to be a practical model.

Key words: Sunlight, Sunlight, Radiation, GIS Model, Terrain