土壤水分动态随机模型研究进展

Research progress on stochastic soil moisture dynamic model

土壤水是地球表层系统的重要组成,是水文循环的核心,控制着最基本的陆地生态系统格局与过程,是陆地生态系统健康运行的关键。土壤水分动态是研究水文过程和陆地生态系统过程相互作用及反馈必不可少的一环,是一系列水文、气候和生态过程非线性动态作用的结果。因此,土壤水分动态表现为脉动、无规律和随机的过程,对其研究需要随机方法。本文综述了基于土壤水分平衡的土壤水分动态随机模拟的研究进展,主要关注土壤水分动态随机模型的分类比较和适用性。希望能为国内生态水文学的定量研究提供一些参考,促进对水文循环与陆地生态系统之间相互作用更好的理解,最终有助于水资源和生态系统的可持续管理。

As an important component of the earth surface system and the core of hydrological cycle, soil water controls the most basic terrestrial ecosystem patterns and processes, which is key for the healthy operation of the terrestrial ecosystem. Soil moisture dynamics is an indispensable part of the research on the interactions and feedbacks between hydrological processes and terrestrial ecosystem processes, which is the result of non-linear interactions among a series of hydrological, climatic, and ecological processes. Consequently, soil moisture dynamics needs to be studied by stochastic methods, which can reasonably describe the characteristics of soil moisture dynamics including the pulse, erratic, and random processes. In this article, we systematically review the development of stochastic modeling of soil water content based on the principle of soil water balance, and focus on the classification and application of these models. This review could supply some useful reference for quantitative studies of stochastic soil moisture dynamic processes and be beneficial to the research on ecohydrology in China. This review also could promote a better understanding of interactions between hydrological cycle and the terrestrial ecosystem, and ultimately contribute to the knowledge base on the sustainable management of water resources and ecosystems.