Distributed Modeling of Global Solar Radiation over Rugged Terrain of the Yellow River Basin
Distributed Modeling of Global Solar Radiation over Rugged Terrain of the Yellow River Basin
复制标题
DOI：
10.11867/j.issn.1001-8166.2008.11.1185
复制
发表时间：
2008-11
期刊：
影响因子：
--
通讯作者：
Q. Xinfa;L. Changming;Pan Ao-da;Zeng Yan
中科院分区：
文献类型：
--
作者：
Q. Xinfa;L. Changming;Pan Ao-da;Zeng Yan
在崎岖地形下，到达地表的太阳总辐射（GSR）由i.e.direct太阳辐射、散射太阳辐射和地形反射太阳辐射三部分组成，这三种太阳辐射的理论各不相同，建立各自的模型时必须综合考虑天文地理因素、局部地形因素在DEM的基础上，利用地形因子（即坡度、坡向和地形间的遮挡效应）和大气物理因子，建立了一个基于DEM的地形因子模型本文利用数字高程模型（Digital Elevation Model）数据和遥感数据，建立了一个以常规气象观测数据为输入，综合考虑影响地面电阻率的各种因素的分布式地面电阻率计算模型。结果表明，受地形因素（方位角、坡度和地形间遮挡效应）的影响，山地年GSR量一般小于平原，局部地形因子对GSR的影响随季节变化，在太阳高度角较低的季节更为明显。
In rugged terrain,the global solar radiation(GSR) reaching on the surface is composed of three parts,i.e.direct solar radiation,diffuse solar radiation and terrain reflected solar radiation.The theories of these three kinds of solar radiation are different.Respective models are established which necessarily take integrated consideration of astronomical and geographic factors,local topographic factors(i.e.slope,aspect and terrain inter-shielding effect) and atmospheric physics factors are needed.Based on DEM(Digital Elevation Model) data and remote sensing data,a distributed model for calculating GSR over rugged terrain is developed,with routine meteorological observations as input.This model takes all consideration of factors influencing GSR.Using the established model,normals of annual GSR quantity with resolution of 1 km×1 km for the Yellow river basin was generated.Results suggest that influenced by local topographic factors,i.e.azimuth,slope and terrain inter-shielding effect,annual GSR quantity over mountainous areas is smaller than that over plains generally.The influences of local topographic factors on GSR are changing with seasons and are more obvious in seasons that have a lower solar elevation angle.