Guidelines for Delineation of Wellhead Protection Areas PDF Download
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Author:
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 220
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Book Description
Author:
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 220
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Book Description
Author: Rick Bastasch
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 364
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Book Description
This in-depth examination of water law and management in Oregon provides a compelling perspective on a major environmental issues in the American West--the region's diminishing water supply. Bastasch offers thorough yet accessible explanations of a variety of water issues and controversies, bringing focus and clarity to a murky, complex subject. From Oregonians seeking interesting facts about their state's water riches to water specialists and users in need of a handy reference to Oregon's water law, the handbook offers a key to understanding how we use this precious and scarce resource.
Author: George H. Hargreaves
Publisher: Water Resources Publication
ISBN: 9781887201100
Category : Technology & Engineering
Languages : en
Pages : 202
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Book Description
IRRIGATION FUNDAMENTALS is a comprehensive text on the basic principles and practices of applied agricultural irrigation. Written over a period of more than 10 years, it is based on the authors'' extensive experience in farming, consulting, research, teaching, and other related agricultural activities. The book is for use by teachers of introductory courses in irrigation, farmers who have some basic technical knowledge, and for administrators who need a general understanding of irrigation as an aid for policy decisions in water resource development and planning. Various factors that influence crop yield and production including climate, fertility, water, drainage, and agronomic practices are addressed. The various irrigation methods such as border, basin, contour, furrow, sub, sprinkle, and drip or trickle are described; and conditions are given for selection of the appropriate method to use. Recent developments and new technology are included herein when they have obvious practical applications, but for the most part the material presented in this book is based on well established principles and practices. Much of the content is very practical and much is essentially nontechnical. Nevertheless, some of the material covered in this book goes beyond the basic concepts in an attempt to better describe the relationships and techniques employed by irrigation scientists and irrigation engineers.From the Preface: The future of the world depends very much on how we manage natural resources. Since the year 1900 there has been a ninefold increase in global carbon emissions from burning fossil fuels, and the world population has increased about 3.7 times in this century. Vast areas of forests have been destroyed, and irrigated lands now produce 40% of the food supply. Due to depletion of groundwater reserves and an increase in population, irrigated area per capita is declining. Consequently, the irrigation of additional alluvial lands is a strategic necessity for all of humankind. Much of the alluvial lands cannot be made productive without prior development of water resources through flood control, drainage, and irrigation. The production of electricity through hydropower and the production of alcohol fuel from irrigated crops, as has been practiced for many years in Brazil, can slow the increase in carbon emissions. Such diverse developments are typically not separable; rather, they must be considered as integral parts of a comprehensive development plan. The conservation of natural resources and increasing productivity of irrigated lands are also strategic necessities. Much of the current technology is highly transferable and crop yields can be significantly increased on lands already under irrigation.The authors have worked in many countries in connection with resource inventories, teaching, and the planning, development and use of irrigation as a tool for increasing production and providing employment. They have written extensively and have been honored for their achievements. They have considerable experience with everything from primitive low-technology irrigation developments to highly developed irrigation in the USA and in dozens of countries around the world. Both of the authors have dedicated their careers to teaching, research, and consulting in agricultural irrigation and water resources development and planning. It is their hope and expectation that this book will provide incentives for investigating and documenting land and water resources, improving development, increasing crop yields, conserving resources, and improving the environment. From the Table of Contents:Chapt. 1 - INTRODUCTION: Irrigation Fundamentals: - - A Definition of Irrigation - - Statistical Perspectives of Agricultural IrrigationChapt. 2 - FACTORS INFLUENCING CROP PRODUCTION: - - Introduction - - Temperature, Radiation, and Evaporative Potential - - Climate Change - - Soil Fertility and Fertilizers - - Water Availability and Distribution - - Soil Aeration and Drainage - - Plant Density, Spacing and Leaf Area Index - - Crop VarietyChapt. 3 - AGRICULTURAL SOILS: - - Introduction - - Soil Texture and Structure - - Soil Classification and Evaluation - - Bureau of Reclamation Land Classification - - Soil Age and Topography - - Soil Chemistry - - Infiltration Rates - - Soil-Water Relationships - - Equations for Soil Water Content - - Soil Water Potential - - Measuring Soil Water ContentChapt. 4 - EVALUATING IRRIGATION RESOURCES: - - Introduction - - Climate - - Hydrology - - Human and Other Factors - - Integrated DevelopmentChapt. 5 - IRRIGATION METHODS: - - Introduction - - Graded Border Irrigation - - Basin Irrigation - - Contour Levees - - Furrow Irrigation - - Sub-Irrigation - - Sprinkle Irrigation - - Drip or Trickle Irrigation - - Selecting an Irrigation Method - - Land Grading and Leveling - - Laser-Leveling Equipment and Practices - - Computing Diagonal Slopes - - Irrigation System EvaluationChapt. 6 - CROP WATER REQUIREMENTS: - - Introduction - - Direct Methods - - Indirect Methods - - Potential Evaporation - - Reference Evapotranspiration - - Extraterrestrial Solar Radiation - - Irrigation Requirements - - Crop CoefficientsChapt. 7 - IRRIGATION SCHEDULING: - - Introduction - - Allowable Water Depletion - - Monitoring Soil Water - - Scheduling Irrigations - - Rice Irrigation
Author:
Publisher:
ISBN:
Category : Building
Languages : en
Pages : 44
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Book Description
Author: Michael J. Focazio
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 44
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Book Description
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 884
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Book Description
Author:
Publisher:
ISBN:
Category : Drinking water
Languages : en
Pages : 12
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Book Description
Author: United States. Environmental Protection Agency
Publisher:
ISBN:
Category : Environmental protection
Languages : en
Pages : 420
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Book Description
Author:
Publisher:
ISBN:
Category : Water conservation
Languages : en
Pages : 224
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Book Description
Author: Stephen S. D. Foster
Publisher: World Bank Publications
ISBN:
Category : Reference
Languages : en
Pages : 120
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Book Description
Groundwater is an essential natural resource for the economic and secure provision of drinking water supplies. Pollution hazard assessment is an essential part of environmental best practice for water supply utilities, both in terms of protecting groundwater quality from future pollution and mitigating threats posed by existing activities. This book looks at the need for groundwater protection strategies, and provides a technical guide to methodological approaches including: mapping aquifer pollution vulnerability; the delineation of groundwater supply protection areas; developing an inventory of subsurface contaminant load; and the assessment and control of groundwater pollution hazards. The guide is particularly relevant for the Latin American and Caribbean region where many cities are highly dependent upon groundwater resources.
