Spatial distribution of astronomical radiation during watershed evolution
In the report,based on the DEM data of the nine artificial rainfall simulation basins,MATLAB was used to calculate the astronomical radiation of the basin under evolutionary conditions,and the spatial distribu-tion of annual astronomical radiation in each stage of the basin was simulated.The statistical methods such as mean,coefficient of variation,kurtosis,and skewness,were used to quantify the quantitative characteristics of astronomical radiation,and the landscape ecology indicators were used to quantify the spatial structure charac-teristics.The results indicated that the numerical variation of annual astronomical radiation in the different stag-es of watershed evolution ranges from 2 to 12 596 MJ∙m-2.From large to small,the average astronomical radia-tion value is in the early evolution stage,the active evolution stage,and the stable evolution stage,respectively.From large to small,the degree of difference of the radiation amount is in the active evolution stage,the stable evolution stage,and the early evolution stage.At the different stages of the evolution in small watersheds,the variation patterns of various landscape indices at the patch type level were basically consistent,while the land-scape indices at the landscape level exhibited fluctuating characteristics.In addition,the changes of the quanti-tative and spatial structural characteristics of astronomical radiation during the active evolution stage(experi-mental stages Ⅳ～Ⅵ)were significant.
astronomical radiationevolutionary conditionsspatial distributionlandscape indexdigital eleva-tion model
万方数据
维普
