The Simulation Of Solar Radiation And Heat Resource In The Area Of Lishui In Zhejiang

Based on Geographic Information System (GIS), the time and space distributions of solar radiation resources and heat resources over rugged terrains in the southwest of Zhejiang province were simulated, with the combination of the monthly solar radiation data and monthly mean meteorological routine observation at 70 sites in the province and some other cities around from 1951 to 2000 and 1:250,000 DEM data of Zhejiang province. The direct, diffuse, topography reflect and global solar radiation, the monthly mean air temperature, accumulated temperature and its duration with different boundary temperature in 100m×100m resolution were mapped. The results provide reliable methods for the solar radiation resources and heat resources study, and support basic data and scientific directions for the analysis and use of terrain climatic resources there.The major works of this paper were as follows:(1) The distributed models of terrain solar radiation resources were established. Taking the distributed model as the core technology, with the combination of GIS, RS and other spatial information technology and climatology fields, a terrain solar radiation model was developed, including the information of topography, sky and air condition. The time and space distributions of direct solar radiation, diffuse solar radiation, topography reflect solar radiation and global solar radiation were mapped in the area of Lishui in Zhejiang.(2) Based on the simulation on solar radiation resource, the models of heat resource were established, which contained altitude, global solar radiation, long-wave radiation and some other factors. Lishui terrain heat resources measures were simulated and drawn in grids, including the distribution of monthly mean temperature, the start and end dates, the duration of accumulative temperature, corresponding active and effective accumulative temperatures.(3) The analysis indicated that the simulation of terrain solar radiation and heat resources in Lishui reflects the macroscopic and local distribution characteristics. Terrain is of significant impact on solar radiation, monthly mean air temperature and accumulated temperatures with different boundary over rugged terrain. Taking the slope, aspect, surface albedo and other local factors which effect on the solar radiation into account, the models show the distribution of local air temperature, the start and end dates and accumulative temperatures in south and north slopes more credibly.The thesis is characterized by:(1) The factor of the non-uniform surface is divided into two aspects:terrain undulation and the variety of underlying surface, which makes the solar radiation distributed models more universality and efficiency.(2) There is close correlation among those terrain solar radiation and heat resources distribution models, in which the parameters have clear physical meaning and the simulations are reasonable.(3) The heat resource model is not based on on-the-spot investigation, but the experimental statistic model of routine meteorological observation using GIS technology, which is easier for popularization. This is one of the most feasible methods for modeling terrain heat resources.