Soil pores in preferential flow terminology and permeability equations

IF 2.5 3区地球科学 Q3 ENVIRONMENTAL SCIENCES

Vadose Zone Journal Pub Date : 2024-07-10 DOI:10.1002/vzj2.20365

Hida R. Manns, Yefang Jiang, Gary Parkin

引用次数: 0

Abstract

Linkages between the micro‐scale of soil water and landscape scale of hydrological data could be improved with the analysis of soil factors in preferential flow rates. This rearrangement of the terminology on soil pore size from published literature focused on the relationship between aggregate and pore size. In the range of pore size relevant to water flow (>0.005 mm), a 2:1 ratio of aggregate to pore diameter approximated the mean of proposed pore size categories. Major functional change points in soil pore size were identified where water becomes mobile in soil (0.005 mm), where preferential flow among aggregate surfaces begins (0.3 mm), and where water flows without soil interaction (bypass flow ∼1.0 mm). A number of published equations supported the application of soil pore size in permeability estimation for modeling hydraulic conductivity. Common understanding of soil pore terminology would support water flow estimation from soil to landscape scales.

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优先流术语和渗透方程中的土壤孔隙

土壤水微观尺度与水文数据景观尺度之间的联系可以通过分析优先流速中的土壤因素得到改善。对已发表文献中有关土壤孔隙大小的术语进行的重新整理，主要集中在骨料与孔隙大小之间的关系上。在与水流相关的孔径范围内（0.005 毫米），集料与孔径的比例为 2:1，这接近于拟议孔径类别的平均值。确定了土壤孔隙大小的主要功能变化点，即水开始在土壤中流动的位置（0.005 毫米）、开始在集料表面优先流动的位置（0.3 毫米）以及水在无土壤相互作用的情况下流动的位置（旁路流动 ∼ 1.0 毫米）。许多已公布的公式都支持将土壤孔隙大小应用于透水性估算，以模拟水力传导性。对土壤孔隙术语的共同理解将支持从土壤到景观尺度的水流估算。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Vadose Zone Journal 环境科学-环境科学

CiteScore

5.60

自引率

7.10%

发文量

审稿时长

3.8 months

期刊介绍： Vadose Zone Journal is a unique publication outlet for interdisciplinary research and assessment of the vadose zone, the portion of the Critical Zone that comprises the Earth’s critical living surface down to groundwater. It is a peer-reviewed, international journal publishing reviews, original research, and special sections across a wide range of disciplines. Vadose Zone Journal reports fundamental and applied research from disciplinary and multidisciplinary investigations, including assessment and policy analyses, of the mostly unsaturated zone between the soil surface and the groundwater table. The goal is to disseminate information to facilitate science-based decision-making and sustainable management of the vadose zone. Examples of topic areas suitable for VZJ are variably saturated fluid flow, heat and solute transport in granular and fractured media, flow processes in the capillary fringe at or near the water table, water table management, regional and global climate change impacts on the vadose zone, carbon sequestration, design and performance of waste disposal facilities, long-term stewardship of contaminated sites in the vadose zone, biogeochemical transformation processes, microbial processes in shallow and deep formations, bioremediation, and the fate and transport of radionuclides, inorganic and organic chemicals, colloids, viruses, and microorganisms. Articles in VZJ also address yet-to-be-resolved issues, such as how to quantify heterogeneity of subsurface processes and properties, and how to couple physical, chemical, and biological processes across a range of spatial scales from the molecular to the global.