Download or read book Discharge Characteristics of Triangular notch Thin plate Weirs written by John Shen and published by . This book was released on 1981 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Discharge Characteristics of Triangular notch Thin plate Weirs written by John Shen and published by . This book was released on 1980 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Discharge Characteristics of Triangular notch Thin Plate Weirs written by John Shen and published by . This book was released on 1981 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Discharge Characteristics of Triangular notch Thin plate Weirs written by Billy Paul Robinson and published by . This book was released on 1962 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Discharge Characteristics of Triangular notch Thin plate Weirs written by John Shen and published by . This book was released on 1981 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Survey Water supply Paper written by and published by . This book was released on 1950 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Survey Water supply Paper written by and published by . This book was released on 1964 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1982 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1982 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Discharge Characteristics of V shaped Multi slit Weirs written by Kai Ji and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: V-shaped weirs with small angles are efficient in accurately measuring extremely small discharge rates. The concept of slit weirs to measure discharge rates has been studied in recent investigations. Rectangular multi-slit notches or weirs have been shown to extend the range of flow measurement to include both very low and high discharge rates. It is a well-known fact that V-notches whose sections are narrower at lower heads are preferred to rectangular notches to measure small discharge rates in laboratories. To increase the range of discharges measured, the concept of multi-slit weirs using rectangular weirs has been introduced recently. For rectangular multi-slit weirs, experimental data showed that the discharge coefficient C d for multi-slit weirs or a single weir was a function of the Reynolds number R e when R e is based on the width of rectangular weirs. V-notches are generally used for laboratory flow measurements, as they can very precisely measure discharge rates. Hence, the multi-slit weirs formed by V-notches are expected to measure discharges in a very wide range of discharge rates. To represent a common discharge coefficient C d for multi-slit weirs formed of either rectangular or triangular shaped individual weirs, a new Reynolds number R eR is proposed to unify representation of discharge coefficient data for both rectangular shaped and V-shaped multi-slit weir units. C d data for both rectangular and V-shaped multi-slit weirs fall on a single curve and appear to be the function of R eR . At large Reynolds number, R eR, the discharge coefficient C d approaches a constant value of 0.61. This constant also denotes the contraction coefficient for the narrow two-dimensional slit flow. Present test data show that C d for multi-slit V-shaped weirs is generally a function of R eR for b/B
Download or read book Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1948 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Discharge Characteristics written by D.S. Miller and published by Routledge. This book was released on 2017-11-22 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual provides the procedures and data necessary to calculate discharges over and through hydraulic structures. Contents: Introduction; Discharge measurement structures; Discharge relationships and component head losses for hydraulic structures; Headlosses in closed conduit systems flowing full; Analysis of flow conditions and hydraulic design for river diversion in closed conduits; Flow through and over rockfill structures
Download or read book Advances in Hydroscience written by Ven Te Chow and published by Elsevier. This book was released on 2013-10-22 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Hydroscience, Volume 10-1975 covers articles on the evergrowing scientific knowledge on water. The book presents articles on modeling techniques for groundwater evaluation and tidal theory and computations, including the basic equations for the prediction of tides, the hydrodynamic tidal equations for the dynamic behavior of the tides, and tidal computations in rivers, seas, and coastal waters. The text also includes articles on hydrothermal convection in saturated porous media, as well as the theory of Weirs. Hydroscientists, harbour engineers, coastal engineers, oceanographic engineers, and future designers and users of hydraulic structures for water resources development will find the book invaluable.
Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.). and published by . This book was released on 1979 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Irrigation Fundamentals written by George H. Hargreaves and published by Water Resources Publication. This book was released on 1998 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Publications of the U S Geological Survey 1971 1981 written by and published by . This book was released on 1986 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
