Evapotranspiration Estimation Based on the Complementary Relationships PDF Download
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Author: Virginia Venturini
Publisher:
ISBN: 9789533078083
Category :
Languages : en
Pages :
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Book Description
Author: Virginia Venturini
Publisher:
ISBN: 9789533078083
Category :
Languages : en
Pages :
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Book Description
Author: Mike Hobbins
Publisher:
ISBN:
Category : Evaporation (Meteorology)
Languages : en
Pages : 59
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Book Description
Author: Stavros Alexandris
Publisher: BoD – Books on Demand
ISBN: 9535111159
Category : Science
Languages : en
Pages : 288
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Book Description
Evapotranspiration - An Overview contains recent advances in the physics of evaporation and transpiration from a typical experimental site to large scale areas. It incorporates many years of authors experience with the latest research on the methods and the models used worldwide, engaging advanced technology and modern instrumentation. The reader benefits from the in-depth analysis and the diverse sites and settings, where the models, applications and methods are tested. Weather conditions, soil moisture, geology, climatic systems are examined for their role and influence on the theoretical and actual water demand by the atmosphere in the earth's ecosystem. This book not only provides students and scientists with the information to improve the procedures for estimating evapotranspiration, but will also help them to manage and evaluate the observed data.
Author: Ketema Tilahun Zeleke
Publisher:
ISBN: 9789533078083
Category :
Languages : en
Pages :
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Book Description
Author: Jorge A. Ramirez
Publisher:
ISBN:
Category : Climatology
Languages : en
Pages : 520
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Book Description
Author: Haoyu Niu
Publisher: Springer Nature
ISBN: 3031149378
Category : Technology & Engineering
Languages : en
Pages : 176
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Book Description
Estimating evapotranspiration (ET) has been one of the most critical research areas in agriculture because of water scarcity, the growing population, and climate change. The accurate estimation and mapping of ET are necessary for crop water management. Traditionally, researchers use water balance, soil moisture, weighing lysimeters, or an energy balance approach, such as Bowen ratio or eddy covariance towers to estimate ET. However, these ET methods are point-specific or area-weighted measurements and cannot be extended to a large scale. On the other hand, while remote sensing is able to provide spatially distributed measurements, the spatial resolution of multispectral satellite images is often not enough for crops with clumped canopy structures, such as trees and vines. Unmanned aerial vehicles (UAVs) can mitigate these spatial and temporal limitations. Lightweight cameras and sensors can be mounted on the UAVs and take high-resolution images. Unlike satellite imagery, the spatial resolution of the UAV images can be at the centimeter-level. UAVs can also fly on-demand, which provides high temporal imagery. This book examines the different UAV-based approaches of ET estimation. Models and algorithms, such as mapping evapotranspiration at high resolution with internalized calibration (METRIC), the two-source energy balance (TSEB) model, and machine learning (ML) are discussed. It also covers the challenges and opportunities for UAVs in ET estimation, with the final chapters devoted to new ET estimation methods and their potential applications for future research.
Author: F. I. Morton
Publisher:
ISBN:
Category : Evaporation (Meteorology)
Languages : en
Pages : 68
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Book Description
"This report contains the necessary documentation for application of the computer programs REVAP and WEVAP. Estimates of areal evapotranspiration or lake evaporation for periods of 5 days to 1 month are made from routinely published records of air temperature, dew point temperature and sunshine duration. Both models are based on a complementary relationship between areal and potential evapotranspiration"--Abstract.
Author: Nebo Jovanovic
Publisher:
ISBN: 9789533078083
Category :
Languages : en
Pages :
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Book Description
Author: Viliam Novak
Publisher: Springer Science & Business Media
ISBN: 9400738404
Category : Science
Languages : en
Pages : 263
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Book Description
Evapotranspiration and its components (evaporation and transpiration) as a process is one of the basic terms of Earth's water balance; its importance is accented by the fact that transpiration is the vital element of the biomass production process. The second important property of evapotranspiration is its extreme consumption of solar energy, thus controlling the temperature of the atmosphere and creating favourable conditions for life. Evapotranspiration as an energy consuming process is also the connection between the energy and mass cycles of the Earth. Evapotranspiration is a process performing in the Soil–Plant –Atmosphere System (SPAS); therefore this book is presenting and quantifying it as a catenary process, describing transport of water in the soil, including root extraction patterns and methods of its evaluation. Transport of water through the plant and from the canopy to the atmosphere is also described and quantified. A variety of evapotranspiration (and its components evaporation and transpiration) calculation methods are described, starting from empirical methods up to the most sophisticated ones based on the solution of the transport equations of water and energy in the SPAS. The most important (and widely used) calculation method - modified Penman–Monteith method is described in details, ready to be used with data in the book only. Water balance method of evapotranspiration estimation as well as sap flow method description can be found in the book as well. The book can be used by hydrologists, biologists, meteorologists and other specialists as well as by ecology students. Key themes: soil hydrology – evapotranspiration – hydropedology– plant physiology – water movement in soils – evaporation – transpiration Dr. Viliam Novák is a water resources scientist at the Institute of Hydrology of the Slovak Academy of Sciences in Bratislava (Slovakia).
Author: Daniel Bucur
Publisher: BoD – Books on Demand
ISBN: 1789858119
Category : Science
Languages : en
Pages : 142
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Book Description
Since the beginning of its formation approximately three billion years ago, the hydrosphere - as an envelope of the terrestrial ellipsoid - has remained constant from a quantitative point of view. The hydrosphere modifies only the ratio of the stretches of the planetary ocean and land, including the proportion of the states of water aggregation: gaseous, liquid, and solid.The hydrological cycle transports only a portion of the hydrosphere, repeats itself annually, and presents itself as a huge planetary plant that for billions of years has operated uninterruptedly on the basis of solar energy and gravity, providing freshwater resources for the maintenance and perpetuation of life beyond the planetary ocean.Water resources are highly influenced by the hydrologic cycle and play a role in agricultural economic development. However, as is shown by the Intergovernmental Panel on Climate Change report, the phenomena of changing climate and land use are set to exacerbate an already serious situation of water supply for various users. In this context, scientific investigations into the issue of the sustainable use of water are timely and important. Improvement of water management involves the accurate estimation of consumptive uses. The purpose of this book is to show the achievements of scientists and academicians all over the world in promoting and sharing new issues on various topics related to evapotranspiration.
