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在黄土高原农牧交错带的六道沟流域,通过2年观测,研究了主要人工造林树种油松、刺槐、柠条和沙柳的冠层截留特征。结果表明:4个树种林冠截留量和林内降雨量均与大气降水量呈正相关,其中林冠截留量与大气降水量呈幂函数关系;油松林平均截留率为16.7%,刺槐林为11.6%,沙柳林为12.8%,柠条林为11.2%。模拟结果表明,修正的王彦辉模型较原模型能够更好地反映黄土高原半干旱地区典型乔灌木树种冠层截留的大小。
The canopy trapping characteristics of Pinus tabulaeformis, Robinia pseudoacacia, Caragana korshinskii and Salix psammophila were studied in the Liudaogou watershed in the ecotone between agriculture and animal husbandry in the Loess Plateau through 2 years of observation. The results showed that the canopy interception capacity and rainfall in the forest were positively correlated with the precipitation, and the canopy interception capacity was a power function relationship with the precipitation. The average retention rate of Pinus tabulaeformis forest was 16.7%, that of Robinia pseudoacacia forest was 11.6% and that of sand Liulin is 12.8%, Caragana forest is 11.2%. The simulation results show that the modified Wang Yanhui model can better reflect the canopy interception of typical shrub and shrub species in the semi-arid area of the Loess Plateau than the original model.