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林冠和土壤有机质层是森林生态系统的两个重要组成部分,它们与雨水发生相互作用并改变其化学性质。New Brunswick中部不同针、阔叶林13年观测资料说明不同林分改变雨水化学性质的能力不同,这与林分对雨水的分割有关。整流一般增加雨水的酸度,而穿透雨则降低雨水酸度。到达林地的雨水与林间溪水化学性质相似。不同林下地被物持水能力差异极大,因而影响雨水中的酸性物质在林地的逗留时间。在雨水流出有机质层,进入溪流和湖泊之前,矿质土壤将进一步改变其化学成分。
Canopy and soil organic matter are two important components of forest ecosystems that interact with rainwater and alter their chemical properties. The 13-year observation data of different needles and broad-leaved forests in the central part of New Brunswick indicate that the ability of different stands to change the chemical properties of rainwater is different, which is related to the division of rainwater by stand. Rectification generally increases the acidity of the rain, while penetrating the rain reduces the acidity of the rain. The rainwater reaching the woodlands is chemically similar to the brook. Different forest under water holding capacity vary greatly, thus affecting the acid rainwater in woodland stay time. Mineral soils will further alter their chemical composition before it reaches the streams and lakes.