Author: Jay Dunton DorseyPublisher:
ISBN:
Category :
Languages : en
Pages : 306
Book Description
A Comparison of Three Field Methods for Measuring Saturated Hydraulic Conductivity
Author: Jay Dunton DorseyField Comparison of Three Methods of Measuring Field-saturated Hydraulic Conductivity (K[subscript Fs]) of the Vadose Zone
![Field Comparison of Three Methods of Measuring Field-saturated Hydraulic Conductivity (K[subscript Fs]) of the Vadose Zone PDF](https://books.google.com/books/content/images/frontcover/35ILOAAACAAJ?fife=w80-h100)
Author: Rick PoladPublisher:
ISBN:
Category : Hydraulic measurements
Languages : en
Pages : 274
Book Description
Comparison of Field Methods for Measuring Hydraulic Conductivity of Soil
Author: L. S. YingComparison of Field Methods for Measuring Hydraulic Conductivity
Author: Abdul JamilA Comparison of Methods for Measuring the Saturated Hydraulic Conductivity of Four Field Soils Having a Range of Textures [microform]
![A Comparison of Methods for Measuring the Saturated Hydraulic Conductivity of Four Field Soils Having a Range of Textures [microform] PDF](https://books.google.com/books/content/images/frontcover/XuGiwgEACAAJ?fife=w80-h100)
Author: Lee, Doreen M. (Doreen Mary)Publisher: National Library of Canada
ISBN: 9780315246645
Category :
Languages : en
Pages :
Book Description
Surface and Groundwater Resources Development and Management in Semi-arid Region
Author: Chaitanya B. PandePublisher: Springer Nature
ISBN: 3031293940
Category : Science
Languages : en
Pages : 426
Book Description
This book explains the challenges for efficient sustainable surface and groundwater development and management with the focus on India and other countries, providing a stable output presentation by using machine learning data mining methods, and modeling. It is a combination of machine learning, modeling, google earth engine, climate data modeling, remote sensing and GIS techniques, surface water modeling, AHP modeling, groundwater quality analysis, aquifer mapping, land use and land cover analysis, forecasting of water and rainfall and so on, its use to sustainable development, planning, and management of groundwater purposes in India and other countries. The main purpose of this book will develop better outlines for the development of surface and groundwater and management in the semi-arid region climate, which supports the Sustainable Development Goals (SDGs) in India, especially on sustainable surface water and groundwater resources management. This book provides a multidisciplinary overview for the faculty members, administrators scientists, policymakers, social science, and professionals involved in the various aspects of sustainable groundwater development, planning, and management.
Comparisons of Three Methods for Measuring Saturated Hydraulic Conductivity in the Presence and Absence of a Water Table
Author: Salahaldeen A. MostuffaPublisher:
ISBN:
Category : Soil permeability
Languages : en
Pages : 230
Book Description
Comparison of Four Laboratory and Field Methods for Determining Saturated Hydraulic Conductivity in the Unsaturated Zone
Author: Dana Candice RogersonPublisher:
ISBN:
Category : Groundwater flow
Languages : en
Pages : 132
Book Description
Selected Water Resources Abstracts
Author: Comparison of Laboratory and Field Methods for Determining the Quasi-Saturated Hydraulic Conductivity of Soils
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 14
Book Description
Laboratory and field ponded infiltration tests in quasi-saturated soils (containing entrapped air) exhibit the same three-stage temporal variability for the flow rate and hydraulic conductivity. However, the values for the hydraulic conductivity may differ by as much as two orders of magnitude due to differences in the geometry and physics of flow when different laboratory and field methods are applied. The purpose of this paper is to investigate this variability using a comparison of results of ponded infiltration tests conducted under laboratory conditions using confined cores, with results of field tests conducted using partially isolated cores and double-ring infiltrometers. Under laboratory conditions in confined cores, during the firs stage, the water flux decreases over time because entrapped air plugs the largest pores in the soils; during the second stage, the quasi-saturated hydraulic conductivity increases by one to two orders of magnitude, essentially reaching the saturated hydraulic conductivity, when entrapped air is discharged from the soils; during the third stage, the hydraulic conductivity decreases to minimum values due to sealing of the soil surface and the effect of biofilms sealing the pores within the wetted zone. Under field conditions, the second stage is only partially developed, and when the surface sealing process begins, the hydraulic pressure drops below the air entry value, thereby causing atmospheric air to enter the soils. As a result, the soils become unsaturated with a low hydraulic conductivity, and the infiltration rate consequently decreases. Contrary to the laboratory experiments in confined cores, the saturated hydraulic conductivity cannot be reached under field conditions. In computations of infiltration one has to take into account the variations in the quasi-saturated and unsaturated hydraulic conductivities, moisture and entrapped air content, and the hydraulic gradient in the quasi-saturated or unsaturated soils.