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LONG-TERM SOIL ACIDIFICATION MODEL (LTSAM) DEVELOPMENT AND APPLICATION FOR ANALYZING SOIL RESPONSES TO ACIDIC DEPOSITION

机译:长期土壤酸化模型(LTSAM)的开发及对酸沉降的土壤响应分析

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摘要

A long--term soil acidification model (LTSAM) which can describe calcareous and non- calcareous soil responses to acidic deposition is developed based on the conservation of alkalinity and Ulrich buffer ranges. The model which considers nine major ions of armospheric deposition, has focused on certain soil processes (weathering of carbonates, silicates, and aluminum (Al) oxides or hydroxides, cation exchange, anion retention, and CO_2 solubility). After comparing the model design and simulation results with the SMART, the paper describes several numerical experiments on the sensitivity of calcareous drab soil in Bejing and red earth (nearly dystric cambisol) in Wenzhou of Zhejiang Province in Southern China to acidic deposition scenarios. The modelling results indicate that increase or decrease in atmospheric deposition of base cations and not only changes in deposition of sulfate (S) and H+ must be considered in assessment of critical loads both for red earth and calcareous drab soil.
机译:基于碱度和Ulrich缓冲范围的守恒,建立了可以描述钙质和非钙质土壤对酸性沉积反应的长期土壤酸化模型(LTSAM)。该模型考虑了9个主要的大气层沉积离子,重点研究了某些土壤过程(碳酸盐,硅酸盐和铝(Al)氧化物或氢氧化物的风化,阳离子交换,阴离子保留和CO_2溶解度)。在将模型设计和模拟结果与SMART进行比较之后,本文描述了几个数值实验,研究了中国南部温州的北京和中国南部温州的红壤(几乎是dystric cambisol)的钙质单调土壤对酸性沉积情景的敏感性。模拟结果表明,在评估红土和石灰质单调土壤的临界负荷时,不仅要考虑大气中碱性阳离子的增加或减少,而且不仅要考虑硫酸盐(S)和H +的沉积变化。

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