Xem 1-20 trên 286 kết quả Hydrology
  • Hydrology is a branch of scientific and engineering discipline that deals with the occurrence, distribution, movement, and properties of the waters of the earth. A knowledge of hydrology is fundamental to water and environmental professionals (engineers, scientists and decision makers) in such tasks as the design and operation of water resources, wastewater treatment, irrigation, flood defence, navigation, pollution control, hydropower, ecosystem modelling, etc.

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  • A leading text for undergraduate- and graduate-level courses, this book introduces widely used forms of remote sensing imagery and their applications in plant sciences, hydrology, earth sciences, and land use analysis. The text provides comprehensive coverage of principal topics and serves as a framework for organizing the vast amount of remote sensing information available on the Web. Including case studies and review questions, the book's four sections and 21 chapters are carefully designed as independent units that instructors can select from as needed for their courses.

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  • “Just do an Internet search.” “It’s on the Internet.” How often have we said or been told that we could find it on the Internet. This third edition of The Water Encyclopedia: Hydrologic Data and Internet Resources started from a premise that most of the information provided within this publication could be found on the Internet. As our team of contributing authors started reviewing each section within each chapter, it soon became apparent that you cannot always find it on the internet.

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  • Despite the tremendous progress that has been achieved in water pollution, almost 40% of the U.S. waters that have been assessed by states do not meet water quality goals. About 20,000 water bodies are impacted by siltation, nutrients, bacteria, oxygen depletion substances, metals, habitat alterations, pesticides, and toxic organic chemicals. With pollution from point sources being dramatically reduced, nonpoint source pollution is the major cause of most water that does not meet water quality goals.

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  • Modeling Hydrologic Change: Statistical Methods is about modeling systems where change has affected data that will be used to calibrate and test models of the systems and where models will be used to forecast system responses after change occurs. The focus is not on the hydrology. Instead, hydrology serves as the discipline from which the applications are drawn to illustrate the principles of modeling and the detection of change. All four elements of the modeling process are discussed: conceptualization, formulation, calibration, and verification.

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  • Limitations on the availabilityof water resourcesareamong the greatest challenges facing modern society, despite the fact that roughly 70% of the earth’s surface is covered by water. Human society depends on liquid freshwater resources to meet drinking, sanitation and hy‐ giene, agriculture, and industry needs.Roughly 97% of the earth’s surface and shallow sub‐ surface water is saline and about 2% is frozen in glaciers and polar ice.

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  • Hydrology is the science that deals with the processes governing the depletion and replenishment of water resources of the earth's land areas. The purpose of this book is to put together recent developments on hydrology and water resources engineering. First section covers surface water modeling and second section deals with groundwater modeling. The aim of this book is to focus attention on the management of surface water and groundwater resources.

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  • This work is intended to survey the basic theory that underlies the multitude of parameter-rich models that dominate the hydrological literature today. It is concerned with the application of the equation of continuity (which is the fundamental theorem of hydrology) in its complete form combined with a simplified representation of the principle of conservation of momentum. Since the equation of continuity can be expressed in linear form by a suitable choice of state variables and is also parameterfree, it can be readily formulated at all scales of interest.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Downscaling future climate scenarios to fine scales for hydrologic and ecological modeling and analysis

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  • This report is a product of the Committee on USGS Water Resources Research, which provides consensus advice to the Water Resources Division (WRD) of the U.S. Geological Survey (USGS) on scientific, research, and programmatic issues. The committee is one of the groups that works under the auspices of the Water Science and Technology Board (WSTB) of the National Research Council. The committee considers a variety of topics that are important scientifically and programmatically to the USGS and the nation and issues reports when appropriate....

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  • Vietnam-Netherlands Mekong Delta Masterplan project: Me Kong delta water resources assessment studies has many contents: description of the mekong delta of Viet Nam, hydrology and surface water resources, water quality, hydrogelogy and groundwater recources, water demand and water balance, issues to be solved.

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  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:" Hydrological and climatic responses of Pinus elliottii var. densa in mesic pine flatwoods Florida, USA"

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  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: " Water flux in boreal forest during two hydrologically contrasting years; species specific regulation of canopy conductance and transpiration...

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  • Nước là một loại tài nguyên quý giá và được coi là vĩnh cửu. Không có nước thì không có sự sống trên hành tinh chúng ta. Nước là động lực chủ yếu chi phối mọi hoạt động và dân sinh kinh tế của con người. Nước được sử dụng rộng rãi trong sản xuất nông nghiệp, công nghiệp...

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  • Giáo trình "Thủy văn Công trình" (Engineering Hydrology) là môn học giới thiệu các tính chất, đặc điểm nguồn nước, phương pháp tính cân bằng tài nguyên nước trong hệ thống phục vụ cho việc tính toán xây dựng các công trình thủy điện, thủy nông, xây dựng cầu đường, cấp thoát nước, giao thông thủy.

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  • 2. Các ngành học của KHTĐ: - Khí tượng học (Meteorology) - Thuỷ văn học (Hydrology) - Hải dương học (Oceanography) - Địa chất học (Geology) - Thiên văn học Các ngành học liên quan: Địa lý, Toán, Lý, Hoá, Sinh (Cổ sinh vật học), … Ngô Thị Phương Uyên, 2010 3

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  • The objective of the past work was to capture the main processes, both biophysical and economic, to reproduce them in a virtual world similar to reality. There have been two stages. In a first step, the team tried to select relevant knowledge to set-up a first conceptual model. As an hydrological model was already developed (Hoanh, et al. 2001), the emphasis was put on the economic and social processes. The first idea was to work on the interactions between decisions making at different scales.

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  • The Mekong River Delta (MD), the most downstream part of the Mekong river, is known as the biggest "rice bowl" of Vietnam. Currently, 2.4 million ha are used for agriculture. During the rainy season part of the Delta is flooded. Along the 600 kmcoast, the sea tide strongly influences the water quality by sea water intrusion. In addition, an area of 2-million ha is covered by acid sulfate soils. Also, the MD is very densely populated with intense associated water pollution.

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  • The objective of this paper is the appraisal of the hydrological, hydrogeological, as well as the chemical and microbiological conditions of the surface water and ground water resources of the two study sites. In order to allocate the two study sites into a regional context an intense research on the conditions of the surrounding area was also matter of the survey

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