Investigating moisture dynamics in vegetated soil using novel geophysical tools

使用新型地球物理工具研究植被土壤的水分动态

• 批准号: 2440418
• 金额: --
• 依托单位: Newcastle University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2440418
• 关键词: Investigating; moisture; dynamics; vegetated; soil

Planted areas are an important aspect of managing urban surface water and shallow geotechnical assets. However, root water uptake and the impact on soil hydrology and slope stability are poorly understood in heterogeneous soils and under extreme climatic conditions. To better understand the influence of vegetation on soil water dynamics in geotechnical infrastructure, Electrical Resistivity Tomography (ERT) will be used. ERT is a non-invasive tool for volumetrically measuring and imaging subsurface soil moisture dynamics. Through the various applications of ERT, it is the goal of this research to improve upon the current understanding of vegetation driven soil moisture movement, in order to better analyse slope stability and inform urban planning and development.The aim of this research is to determine the impact of vegetation on the soil hydrological performance of engineered slope fill and SuDS (Sustainable Urban Drainage Systems) using ERT.The objectives of this research are to:1. Critically assess the interactions between vegetation, water, and soil.2. Demonstrate the suitability of ERT for quantifying transient soil moisture changes in granular drainage substrate and clay-based engineered fill.3. Develop and appraise the use of ERT as a non-invasive tool to investigate vegetation-driven moisture movement.4. Determine the range and extent of plant driven soil hydrological changes in granular drainage substrate and clay-based engineered fill.5. Establish using ERT, the transient soil moisture variability in vegetated soils at field scale under natural and simulated atmospheric conditions

种植区是管理城市地表水和浅层岩土工程资产的一个重要方面。然而，在非均质土壤和极端气候条件下，根系吸水及其对土壤水文和边坡稳定性的影响知之甚少。为了更好地了解植被对岩土基础设施中土壤水动力学的影响，将使用电阻率层析成像（ERT）。ERT是一种非侵入性工具，用于对地下土壤水分动态进行体积测量和成像。通过ERT的各种应用，本研究的目标是改善目前对植被驱动的土壤水分运动的理解，为了更好地分析边坡稳定性，并为城市规划和发展提供信息，本研究的目的是确定植被对工程边坡填料和SuDS土壤水文性能的影响（可持续城市排水系统）使用ERT。本研究的目的是：1。严格评估植被、水和土壤之间的相互作用。证明ERT用于量化颗粒状排水基质和粘土基工程填料中瞬时土壤水分变化的适用性。发展和评估ERT作为一种非侵入性工具的使用，以调查植被驱动的水分运动。确定颗粒排水基质和粘土基工程填料中植物驱动的土壤水文变化的范围和程度。利用ERT建立自然和模拟大气条件下田间尺度植被土壤瞬时土壤水分变化