JOURNAL OF NATURAL RESOURCES ›› 2014, Vol. 29 ›› Issue (11): 1968-1977.doi: 10.11849/zrzyxb.2014.11.014

• Resource Evaluation • Previous Articles     Next Articles

Study on Temporal and Spatial Distribution of Sunshine Duration Based on GIS in Karst Mountain Area -Taking Guangxi Bama County for Example

ZHANG Chao1, WU Liang-lin1,2,3, YANG Ni1, LAN Chun-liu1, DENG Shu-lin1   

  1. 1. College of Geography and Planning, Guangxi Teachers'Education University, Nanning 530001, China;
    2. Key Laboratory of Beibu Gulf Environment Change and Resources Use, Ministry of Education, Nanning 530001, China;
    3. Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning 530001, China
  • Received:2013-11-18 Revised:2014-02-24 Online:2014-11-20 Published:2014-11-20

Abstract:

This article, using the computational model of sunshine duration based on DEM in rugged terrains and taking Guangxi Bama County as the example, with the aid of GIS technology, modeled the of monthly sunshine duration and validated the result. Validation determined that the simulated data were in agreement with the measured data from the meteorological station, with a determined coefficient of 0.996. Discussing the characteristics of spatial and temporal distribution of sunshine duration in karst area, it explored the change rules of sunshine duration in different time scales and analyzed the influence of terrain factors such as slope, aspect, relief degree of land surface and surface roughness etc. to sunshine duration. This method could provide essential data of climate, which is significant to the analysis of microclimate and agricultural climate resources distribution in karst area.

Key words: karst, GIS, sunshine duration

CLC Number: 

  • P422.1+1