PDF-Evaporation

By J With EVAPORATION By TOR STUDIES GEOLOGICAL An the Western UNITED. Evapotranspiration. P. = Q + . ET. + G + . Δ. S. Evaporation. Transfer of H. 2. O from liquid to vapor phase. Diffusive process driven by . Saturation (vapor density) gradient ~ (. r. s. – . r. To relate the boiling point of water to its vapor pressure . Objectives. A. . Evaporation and Vapor Pressure . Vaporization or evaporation . Endothermic . A. . Evaporation and Vapor Pressure . Amount of liquid first decreases then becomes constant . What is evaporation?. How is evaporation measured?. How is evaporation estimated?. Reading: Applied Hydrology Sections 3.5 and 3.6. With assistance from Dan Siegel and Marcy Litvak. Evaporation. What is evaporation?. Basic concepts. TSM 352. 7/3/2013. Sid verma. HYDROLOGY | themes | . atmospheric water. “Water . present in the atmosphere either as a solid (snow, hail), liquid (rain) or gas (fog, mist. )”. Topics. Implementing a Soil Water . Oxygen . Isotope Model in . Matlab. Erik . Oerter. EPS 209. 27 April 2011. Project Motivation:. Soil Water Oxygen Isotopes. Soil Water originates as meteoric water, preserving the isotopic signature of precipitation. Evapotranspiration. P. = Q + . ET. + G + . Δ. S. Evaporation. Transfer of H. 2. O from liquid to vapor phase. Diffusive process driven by . Saturation (vapor density) gradient ~ (. r. s. – . r. Evapotranspiration or ET. 62% of precipitation that falls on the continents is evaporated. Understanding and predicting climate change. Q=P-ET. P-ET is the water available for use. ET "loss" supports ecosystems and agriculture. Sun warms ocean water causing it to EVAPORATE. Water vapor CONDENSES to form clouds. Clouds become very heavy before beginning to PRECIPITATE. Precipitation collects in rivers, lakes, and oceans. The sun warms ocean water…. ~A short lived induced dipole . dipole. attraction . between atoms that don’t normally have a dipole moment.. An orbital is an area of probability of an electron. . The electron does not have a uniform motion, at least we don’t think it does. We don’t know what the motion of an electron is. Daily Operations and Accounting. Daily estimates are used for operations and accounting at certain reservoirs, but not all. Estimates are typically based on pan evaporation measurements or reference evapotranspiration. David Tarboton. (Richard Peralta today). Overview. Handouts. Syllabus. Schedule. Student Information Sheet. Homework 1. Web: . http://www.engineering.usu.edu/dtarb/cee3430. . Outline for today. Review Syllabus and Schedule. Liquids have molecules moving around in them. . Temperature is the average kinetic energy (which depends on the speed) of these molecules.. Some are moving. faster than others!. If they are moving fast enough, at just the right angle,. A process whereby liquid water is . converted to water vapour. and . removed from the vapour surface.. Evaporation consists of 2 components i.e. The energy component and the aerodynamic component. The energy component is responsible conversion of liquid water to water vapour. Learning Objectives. Be able to . calculate. Evaporation from a lake or reservoir using the following methods. Energy Balance (p304). Aerodynamic Method (p307). Combined Method (p309). Priestley-Taylor (p309).