Unsaturated-zone Modeling - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Unsaturated-zone Modeling write by R.A. Feddes. This book was released on 2004-10-11. Unsaturated-zone Modeling available in PDF, EPUB and Kindle. Mankind has manipulated the quantity and quality of soil water for millennia. Food production was massively increased through fertilization, irrigation and drainage. But malpractice also caused degradation of immense areas of once fertile land, rendering it totally unproductive for many generations. In populated areas, the pollutant load ever more often exceeds the soil’s capacity for buffering and retention, and large volumes of potable groundwater have been polluted or are threatened to be polluted in the foreseeable future. In the past decades, the role of soil water in climate patterns has been recognized but not yet fully understood. The soil-science community responded to this diversity of issues by developing numerical models to simulate the behavior of water and solutes in soils. These models helped improve our understanding of unsaturated-zone processes and develop sustainable land-management practices. Aimed at professional soil scientists, soil-water modelers, irrigation engineers etc., this book discusses our progress in soil-water modeling. Top scientists present case studies, overviews and analyses of strengths, weaknesses, opportunities and threats related to soil-water modeling. The contributions cover a wide range of spatial scales, and discuss fundamental aspects of unsaturated-zone modeling as well as issues related to the application of models to real-world problems.
Conceptual Models of Flow and Transport in the Fractured Vadose Zone
Conceptual Models of Flow and Transport in the Fractured Vadose Zone - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Conceptual Models of Flow and Transport in the Fractured Vadose Zone write by National Research Council. This book was released on 2001-05-21. Conceptual Models of Flow and Transport in the Fractured Vadose Zone available in PDF, EPUB and Kindle. Fluid flow and solute transport within the vadose zone, the unsaturated zone between the land surface and the water table, can be the cause of expanded plumes arising from localized contaminant sources. An understanding of vadose zone processes is, therefore, an essential prerequisite for cost-effective contaminant remediation efforts. In addition, because such features are potential avenues for rapid transport of chemicals from contamination sources to the water table, the presence of fractures and other channel-like openings in the vadose zone poses a particularly significant problem, Conceptual Models of Flow and Transport in the Fractured Vadose Zone is based on the work of a panel established under the auspices of the U.S. National Committee for Rock Mechanics. It emphasizes the importance of conceptual models and goes on to review the conceptual model development, testing, and refinement processes. The book examines fluid flow and transport mechanisms, noting the difficulty of modeling solute transport, and identifies geochemical and environmental tracer data as important components of the modeling process. Finally, the book recommends several areas for continued research.
Unsaturated Zone Hydrology for Scientists and Engineers
Unsaturated Zone Hydrology for Scientists and Engineers - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Unsaturated Zone Hydrology for Scientists and Engineers write by James A. Tindall. This book was released on 1999. Unsaturated Zone Hydrology for Scientists and Engineers available in PDF, EPUB and Kindle. Introduction and bief history; Physical properties and characteristics of soils; Behavior of clay-water systems; Potential and thermodynamics of soil water; Chemical properties and principles of soil water; Principles of water flow in soil; Saturated water flow in soil; Unsaturated water flow in soil; Transport of heat and gas in osil and at the surface; Contaminant transport; Effects of infiltration and drainage on soil-water redistribution; Applied soil physics: modeling water, solute, and vapor movement. Drainage in soil water and ground water; Soil remediation techniques; Saptial variability, scaling, and fractals; Appendix 1: Site characterizaton and monitoring devices; Appendix 2: Mathematics review; Appendix 3: tables; References; Index.
Identification and Compilation of Unsaturated/vadose Zone Models
Identification and Compilation of Unsaturated/vadose Zone Models - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Identification and Compilation of Unsaturated/vadose Zone Models write by Paul Van der Heijde. This book was released on 1994. Identification and Compilation of Unsaturated/vadose Zone Models available in PDF, EPUB and Kindle.
Modeling Flow in the Unsaturated Zone
Modeling Flow in the Unsaturated Zone - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Modeling Flow in the Unsaturated Zone write by Maria Lane Walsh. This book was released on 1994. Modeling Flow in the Unsaturated Zone available in PDF, EPUB and Kindle.
