Study on the Spatial Distribution of Throughfall in Pinus tabulae for mis Plantations in Northern China
Liu Shuguang (Commission for Integrated Survey of Natural Resources, Beijing)Guo Jingtang (Beijing Forestry University)
The spatial distribution of throughfall in Pinus tabulaeformis plantations in northern China demonstrated that: the amount of through-fall under a single tree increases as the distance from the increases. The maximum amount of throughfall is not always at the canopy gaps, this is because of the translocation effect of the canopy to precipitation. The amount of throughfall at a given point is positively proportional to the area that actually receives rain. Throughfall varies greatly in space, and the range is from 63.8% to 125.3% of the precipitation. Spectral analysis methods were used for the analysis of the throughfall distribution series, and the results are. the spatial distribution pattern of throughfall is mainly determined by the spatial distribution pattern of the canopy structure, periodicity has been found in the series, and it is cau- used by the periodicity of the canopy structure, but it has no evident relation to the periodicity of the trees spatial pattern.