Cuantificación de la extracción de aguas subterráneas mediante proceso digital de imágenes Landsat TM. PDF Download

Author: Salomón Montesinos Aranda
Publisher:
ISBN:
Category :
Languages : es
Pages : 0

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Author: J. Doorenbos
Publisher:
ISBN:
Category : Crops
Languages : en
Pages : 202

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Book Description
Calculation of crop evapotranspiration; Selection of crop coeficient; Calculation of field irrigation requirements.

Author: Eric Dinerstein
Publisher: World Bank Publications
ISBN:
Category : Nature
Languages : en
Pages : 172

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Book Description
Approach; Major ecosystem types, major habitat types, and ecoregions of LAC; Conservation status of terretrial ecoregions of LAC; Biological distinctiveness of territorial ecoregions of LAC at different biogeographic scales results; Integrating biological distinctiveness and conservation status; Conservation assessment of mangrove ecosystems.

Author: OECD
Publisher: OECD Publishing
ISBN: 9264050116
Category :
Languages : en
Pages : 149

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Book Description
This report shows that the high level of policy support contributes little to reduced greenhouse-gas emissions and other policy objectives, while it adds to a range of factors that raise international prices for food commodities.

Author: American Society of Civil Engineers. Task Committee on Revision of Manual 70
Publisher: ASCE Press
ISBN: 9780784414057
Category : Crops
Languages : en
Pages : 0

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Book Description
MOP 70 is a comprehensive reference to estimating the water quantities needed for irrigation of crops projects based upon the physics of evaporation and evapotranspiration (ET).

Author:
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 622

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Author: Michael F. Goodchild
Publisher: John Wiley & Sons
ISBN: 9780470236772
Category : Technology & Engineering
Languages : en
Pages : 536

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Book Description
GIS and Environmental Modeling: Progress and Research Issues Michael F. Goodchild, Louis T. Steyaert, Bradley O. Parks, Carol Johnston, David Maidment, Michael Crane, and Sandi Glendinning, Editors With growing pressure on natural resources and landscapes there is an increasing need to predict the consequences of any changes to the environment. Modelling plays an important role in this by helping our understanding of the environment and by forecasting likely impacts. In recent years moves have been made to link models to Geographical Information Systems to provide a means of analysing changes over an area as well as over time. GIS and Environmental Modeling explores the progress made to date in integrating these two software systems. Approaches to the subject are made from theoretical, technical as well as data stand points. The existing capabilities of current systems are described along with important issues of data availability, accuracy and error. Various case studies illustrate this and highlight the common concepts and issues that exist between researchers in different environmental fields. The future needs and prospects for integrating GIS and environmental models are also explored with developments in both data handling and modelling discussed. The book brings together the knowledge and experience of over 100 researchers from academic, commercial and government backgrounds who work in a wide range of disciplines. The themes followed in the text provide a fund of knowledge and guidance for those involved in environmental modelling and GIS. The book is easily accessible for readers with a basic GIS knowledge and the ideas and results of the research are clearly illustrated with both colour and black and white graphics.

Author: R. Bowen
Publisher: Springer Science & Business Media
ISBN: 9400911033
Category : Science
Languages : en
Pages : 495

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Book Description
Since the Arab oil embargo of 1974, it has been clear that the days of almost limitless quantities of low-cost energy have passed. In addition, ever worsening pollution due to fossil fuel consumption, for instance oil and chemical spills, strip mining, sulphur emission and accumulation of solid wastes, has, among other things, led to an increase of as much as 10% in the carbon dioxide content of the atmosphere in this century. This has induced a warming trend through the 'greenhouse effect' which prevents infrared radiation from leaving it. Many people think the average planetary temperatures may rise by 4°C or so by 2050. This is probably true since Antarctic ice cores evidence indicates that, over the last 160000 years, ice ages coincided with reduced levels of carbon dioxide and warmer interglacial episodes with increased levels of the gas in the atmosphere. Consequently, such an elevation of temperature over such a relatively short span of time would have catastrophic results in terms of rising sea level and associated flooding of vast tracts of low-lying lands. Reducing the burning of fossil fuels makes sense on both economic and environmental grounds. One of the most attractive alternatives is geothermal resources, especially in developing countries, for instance in El Salvador where geothermal energy provides about a fifth of total installed electrical power already. In fact, by the middle 1980s, at least 121 geothermal power plants were operating worldwide, most being of the dry steam type.

Author: Onno Oncken
Publisher: Springer Science & Business Media
ISBN: 3540486844
Category : Science
Languages : en
Pages : 574

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Book Description
This book provides the first comprehensive overview of a complete subduction orogen, the Andes. To date the results provide the densest and most highly resolved geophysical image of an active subduction orogen.

Author: E.G. Gregorich
Publisher: Elsevier
ISBN: 0080541402
Category : Technology & Engineering
Languages : en
Pages : 465

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Book Description
Soil is a complex body that exists as many types, each with diverse properties that may vary widely across time and space as a function of many factors. This complexity makes the evaluation of soil quality much more challenging than that of water or air quality. Evaluation of soil quality now considers environmental implications as well as economic productivity, seeking to be more holistic in its approach.Thus, soil quality research draws from a wide range of disciplines, blending the approaches of biologists, physicists, chemists, ecologists, economists and agronomists, among others.This book presents a broad perspective of soil quality that includes these various perspectives and gives a strong theoretical basis for the assessment of soil quality.A short glossary provides definitions for terms used throughout the book.