相关实验视频

Updated: Jun 30, 2025

Author Spotlight: Advancing Agricultural Land Ecosystem Research with a Hydraulic Property Analyzer to Assess Soil Health

Author Spotlight: Advancing Agricultural Land Ecosystem Research with a Hydraulic Property Analyzer to Assess Soil Health

Published on: August 9, 2024

一个框架来估计透反应介质的土壤水特性曲线和液压导电函数

Christopher S Gray¹, Jongmuk Won², Susan E Burns³

¹Geosyntec Consultants, Atlanta, GA, 30319, United States.

|March 22, 2024

概括

本研究提出了一个框架,用于估计透反应屏障 (PRB) 的土壤水特性曲线 (SWCC) 和液压导电函数 (HCF). 使用额外参数的Kosugi模型最好估计了常见的PRB材料中的不和行为.

科学领域:

环境工程环境工程
地质技术工程地质技术工程
土壤科学土壤科学

背景情况:

透反应屏障 (PRBs) 对于通过吸附去除污染物至关重要.
了解PRB材料的不和行为是预测其效率的关键.
铁氧化物涂层沙子 (IOCS) 和热带石通常用于PRB.

研究的目的:

开发和验证用于估计PRB材料的土壤水特性曲线 (SWCC) 和液压导电函数 (HCF) 的框架.
评价Kosugi模型在描述IOCS和热岩的不和行为方面的表现.
为准确的SWCC和HCF估计确定最佳模型参数.

主要方法:

进行了一项多步出流 (MSO) 实验,以收集有关土壤水和液压导电性的数据.
采用Kosugi的SWCC和HCF模型,使用MSO实验结果优化参数.
分析了三个优化场景,以确定最合适的模型.

主要成果:

科苏吉模型表现出很好的适应观察到的吸气概况,由低根平均平方误差 (RMSE) 表示.
在Kosugi模型中包含一个额外的参数 (β) 产生了最低的RMSE和变化系数.
优化的参数为干净的沙子,IOCS和热带石提供了SWCC和HCF的物理合理估计.

结论:

拟议的框架有效地估计了PRB材料的不和行为.
用参数β增强的Kosugi模型为预测SWCC和HCF提供了一种可靠的方法.
这项研究为设计和评估PRB的性能提供了有价值的工具.

关键词:

液压导电功能的功能液压导电功能的功能铁氧化物铁氧化物透的反应性屏障是一种透的反应屏障.土壤水特性曲线的曲线泽奥莱特石是一种热带石.

更多相关视频

Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity

Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity

Published on: August 19, 2018

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Published on: September 11, 2016

相关概念视频

Permeability of Concrete

Permeability of Concrete

Permeability in the context of concrete refers to how easily liquids or gases can pass through the material. This quality is crucial for assessing the water-tightness and durability of concrete structures and their resistance to chemical attacks. Concrete permeability can be determined through comparative laboratory tests. These tests typically involve sealing a concrete specimen from the sides, applying water pressure to the top surface with pressure, and measuring the amount of water passing...

Design Example: Design of an Irrigation Channel

Design Example: Design of an Irrigation Channel

Trapezoidal channels are widely used in irrigation systems due to their cost-effectiveness and efficiency in conveying water. Trapezoidal channels feature a flat bottom and sloping sides, making them stable and easier to construct compared to other shapes. The bottom width and side slope ratio are determined based on the required flow capacity and site conditions. The side slope is kept gentle for unlined channels to prevent soil erosion.Hydraulic parameters in channel design include the flow...

Porosity and Absorption of Aggregate

Porosity and Absorption of Aggregate

Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the...

Pore Size Distribution

Pore Size Distribution

In concrete, the pore size distribution significantly influences the material's properties. Capillary pores, markedly larger than gel pores, form a vast network within partially hydrated cement paste, reducing the concrete's strength and increasing its permeability. This heightened permeability leads to a greater risk of damage from environmental factors like freeze-thaw cycles and chemical attacks, with the extent of vulnerability also being tied to the water-to-cement ratio.
Adequate...

Uniform Depth Channel Flow

Uniform Depth Channel Flow

Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...

Water Cement Ratio

Water Cement Ratio

The water-cement ratio is pivotal in defining concrete's quality. This ratio, a balance between the weight of water and cement in the mix, shapes the concrete's strength, durability, and resistance to environmental factors. As identified by Abrams’ law, less water in the mix equates to stronger concrete. However, water is essential not only for the chemical process of hydration but also for the concrete's workability and compaction. While hydration chemically binds water and...