黄土区土壤干层形成机理与调控研究进展(3)
来源:学术堂 作者:朱老师
发布于:2016-10-31 共13136字
(4) 建立具有物理意义的土壤干层预测模型,阐明不同情景下的土壤干层调控机制,提出土壤干层科学调控的可能途径。目前已有生态水文模型大都只考虑了较浅土层的土壤水分过程,对深层土壤水分考虑较少。此外,已有模型未考虑植被深根系分布特征、中低水势土壤水分过程及生长年限影响,极大地限制了这些模型在土壤干层模拟预报方面的应用。因此,基于干层模拟较好的SWCCV模型,通过耦合根系、年限和干层动力学指标的子过程模型,提高不同尺度下水分过程模型的预测精度与敏感性,将有助于进一步揭示土壤干层的发生发展过程与演变机制,进而提出土壤干层有效调控的可能途径,为黄土高原植被有效建造和生态服务功能提升提供科学依据。
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