Download or read book Metodolog a para el estudio y medici n de los procesos de erosi n actuales written by and published by . This book was released on 1982 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Medicion sobre el terreno de la erosion del suelo y de la escorrentia written by N. W. Hudson and published by Food & Agriculture Org.. This book was released on 1997 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metodolog a provisional para la evaluaci n de la degradaci n de los suelos written by and published by . This book was released on 1980 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Importancia de la degradación de los suelos. Principios adoptados en la metodología. Procesos de degradación de los suelos. Unidades de medida y comparabilidad entre los diferentes procesos. Recomendaciones para la continuación de la comprabación de la metodología. Métodos de evaluación principales. Observación de los datos de la teledetección. Modelos matemáticos. Evaluación por métodos paramétricos. Evaluación de cada tipo de degradación de los suelos. Erosión hídrica. Erosión eólica. Salinización y sodicación. Degradación química. Degradación física. Degradación biológica. Factores de degradación y fuentes de datos a diferentes escalas. Simbolos utilizados y problemas cartograficos. Empleo de las observaciones directas y de la teledeteccion. Metodos cartograficos parametricos.
Download or read book Dise o y evaluaci n de un m todo para la estimaci n in situ de par metros hidrol gicos involucrados en los procesos de erosi n h drica written by Claudia Beatriz Sanguesa Pool and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: En este estudio se diseñó y construyó un simulador de lluvia para una parcela de erosión de 2,5 x 1 m, con el objetivo de tener un instrumento que permita medir la pérdida de suelo in situ. El simulador construido consta de 4 aspersores del tipo Spray nozzles (boquillas de aspersión de cono lleno sistema Unijet), ubicados en línea, a 1 m de separación. Los aspersores fueron probados en laboratorio en cuanto a su uniformidad y posteriormente el simulador se probó en terreno con 3 diferentes pendientes: 11%, 21% y 39% (9 parcelas en total). La erosión se midió a través de clavos de erosión y del sedimento transportado por la escorrentía. Los aspersores en línea presentaron una uniformidad de 90%, con una intensidad de 124 mm h-1. Cada simulación duró entre 10 a 60 minutos, dependiendo del volumen de escorrentía generado, siendo decisivo el contenido de humedad inicial del suelo. Los valores de erosión medidos a través del transporte de sedimentos variaron entre 103 y 308 kg ha-1 h-1; mientras que con el método de los clavos de erosión se obtuvieron valores entre 6,3 y 61,0 ton ha-1, lo que muestra que hubo movimiento de las partículas del suelo, pero, la alta rugosidad del terreno disminuyó la capacidad de transporte de sedimentos de la escorrentía. A partir de las simulaciones se estimó el coeficiente de escorrentía, el que presentó un promedio de 0,19 para todas las parcelas, variando entre 0,01 y 0,46. El sitio 2 (21 % de pendiente) obtuvo el mayor valor (0,34). De la misma forma se calculó el número de curva para cada simulación, con un promedio global de 34,5, en que el sitio 1 (11 % de pendiente) tuvo el mayor valor (40,4). El simulador construido es una herramienta de fácil uso y de bajo costo, que permite realizar las repeticiones necesarias, para lograr una mayor representatividad espacial de los valores de pérdida de suelo.
Download or read book Agrindex written by and published by . This book was released on 1995 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluaci n de la erosion h drica en parcelas experimentales en campos agr colas de secano mediterraneo written by and published by . This book was released on 2013 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metodolog a para la evaluaci n de la erosi n h drica written by Jorge Aguiló Bonnin and published by . This book was released on 1985* with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predicting Soil Erosion by Water written by Kenneth G. Renard and published by . This book was released on 1997 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction and history; Rainfall-runoff erosivity factor (R); Soil erodibility factor (K); Slope length and steepness factors (LS); Cover-management factor (C); Support practice factor (P); RUSLE user guide; Coversion to SI metric system; Calculation of EI from recording-raingage records; Estimating random roughness in the field; Parameter values for major agricultural crops and tillage operations.
Download or read book Ecological Statistics written by Gordon A. Fox and published by . This book was released on 2015 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application and interpretation of statistics are central to ecological study and practice. Ecologists are now asking more sophisticated questions than in the past. These new questions, together with the continued growth of computing power and the availability of new software, have created a new generation of statistical techniques. These have resulted in major recent developments in both our understanding and practice of ecological statistics. This novel book synthesizes a number of these changes, addressing key approaches and issues that tend to be overlooked in other books such as missing/censored data, correlation structure of data, heterogeneous data, and complex causal relationships. These issues characterize a large proportion of ecological data, but most ecologists' training in traditional statistics simply does not provide them with adequate preparation to handle the associated challenges. Uniquely, Ecological Statistics highlights the underlying links among many statistical approaches that attempt to tackle these issues. In particular, it gives readers an introduction to approaches to inference, likelihoods, generalized linear (mixed) models, spatially or phylogenetically-structured data, and data synthesis, with a strong emphasis on conceptual understanding and subsequent application to data analysis. Written by a team of practicing ecologists, mathematical explanations have been kept to the minimum necessary. This user-friendly textbook will be suitable for graduate students, researchers, and practitioners in the fields of ecology, evolution, environmental studies, and computational biology who are interested in updating their statistical tool kits. A companion web site provides example data sets and commented code in the R language.
Download or read book Slope Stability and Erosion Control Ecotechnological Solutions written by Joanne E. Norris and published by Springer. This book was released on 2010-10-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to assist in choosing ecotechnological solutions for slopes that are prone to a variety of mass movements e.g. shallow failure or erosion. The book reviews the types of problematic slopes that may occur and describes briefly the nature of mass movements and the causes of these movements. There is focus on the use of vegetation to stabilize soil on slopes prone to mass movements. The book also introduces new ecotechnological methods, and case studies are discussed.
Download or read book A handbook on flood hazard mapping methodologies written by Andrés Díez Herrero and published by IGME. This book was released on 2009 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Glosario Del Banco Mundial written by World Bank and published by World Bank Publications. This book was released on 1996 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition of the World Bank has been revised and expanded by the Terminology Unit in the Languages Services Division of the World Bank in collaboration with the English, Spanish, and French Translation Sections. The Glossary is intended to assist the Bank's translators and interpreters, other Bank staff using French and Spanish in their work, and free-lance translator's and interpreters employed by the Bank. For this reason, the Glossary contains not only financial and economic terminology and terms relating to the Bank's procedures and practices, but also terms that frequently occur in Bank documents, and others for which the Bank has a preferred equivalent. Although many of these terms, relating to such fields as agriculture, education, energy, housing, law, technology, and transportation, could be found in other sources, they have been assembled here for ease of reference. A list of acronyms occurring frequently in Bank texts (the terms to which they refer being found in the Glossary) and a list of international, regional, and national organizations will be found at the end of the Glossary.
Download or read book 6th International Conference on the Conservation of Earthen Architecture written by The Getty Conservation Institute and published by Getty Publications. This book was released on 1991-02-28 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: On October 14-19, 1990, the 6th International Conference on the Conservation of Earthen Architecture was held in Las Cruces, New Mexico. Sponsored by the GCI, the Museum of New Mexico State Monuments, ICCROM, CRATerre-EAG, and the National Park Service, under the aegis of US/ICOMOS, the event was organized to promote the exchange of ideas, techniques, and research findings on the conservation of earthen architecture. Presentations at the conference covered a diversity of subjects, including the historic traditions of earthen architecture, conservation and restoration, site preservation, studies in consolidation and seismic mitigation, and examinations of moisture problems, clay chemistry, and microstructures. In discussions that focused on the future, the application of modern technologies and materials to site conservation was urged, as was using scientific knowledge of existing structures in the creation of new, low-cost, earthen architecture housing.
Download or read book Host Bibliographic Record for Boundwith Item Barcode 30112100650693 and Others written by and published by . This book was released on 2013 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleoclimatology and Paleometeorology Modern and Past Patterns of Global Atmospheric Transport written by Margaret Leinen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NATO Advanced Research Workshop on "Paleoclimatology and Paleometeorology: Modem and Past Patterns of Global Atmospheric Transport" (held at Oracle, Arizona, USA from November 17-19, 1987) brought together atmospheric chemists, physicists, and meteorologists who study the origin and transport of modem-day mineral and biological aerosols with geologists and paleobotanists who study the sedimentary record of eolian and hydrologic processes along with modelers who study and conceptualize the processes influencing atmospheric transport at present and in the past. Presentations at the workshop provided a guide to our present knowledge of the entire spectrum of processes and phenomena important to the generation, transport, and deposition of eolian terrigenous material that ultimately becomes part of the geologic record and the modeling techniques that used to represent these processes. The presenta tions on the geologic record of eolian deposition documented our present understanding of the na~e and causes of climate change on time scales of the last glacial ages (tens of thousands of years) to time scales over which the arrangement of continents, mountains, and oceans has changed sub stantially (tens of millions of years). There has been a growing recognition of the importance of global climatic changes to the future well-being of humanity. In particular, the climatic response to human alterations to the earth's surface and chemical composition has led to concern over the agricultural, ecological, and societal impacts of such potential global changes.
Download or read book OECD Environmental Outlook written by OECD and published by OECD Publishing. This book was released on 2001-04-05 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: The OECD Environmental Outlook provides economy-based projections of environmental pressures and changes in the state of the environment to 2020.
Download or read book Restoration Ecology written by William R. Jordan and published by Cambridge University Press. This book was released on 1990-08-16 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although interest in ecological restoration has grown rapidly in recent years, restoration efforts have been highly empirical and have therefore been of only marginal interest to theoretical ecologists concerned with the structure and dynamics of communities. The ability to reassemble a community or ecosystem and to make it function properly actually represents a critical test of ecological understanding in the most fundamental sense. It is this idea of restoration as a technique - and even a paradigm - for ecological studies, leading in turn to improved restoration methods, that is the subject of this book.
