PPT-EVAPORATION LECTURE 7 EVAPORATION

Net rate of vapor transport to the atmosphere Reverse process of precipitation Evaporation considered to be a problem for reservoirs storage on one hand may prove very valuable on the other hand . 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. 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?. Impacts of Annual/Perennial . Bioenergy. Crops. Eleanor Burkett - . Extension Educator, University of Minnesota. Roberta Dow, PhD -. Extension Educator, Michigan State University. Course outline. Overview of the water and water cycle. 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. ~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. SIAM Numerical Combustion ‘17. April 3, 2017. Orlando, FL. Pavan. B. . Govindaraju. Matthias . Ihme. Special thanks . to . Lucas . Esclapez. , . Thomas . Jaravel. and Alessandro . Stagni. and CRECK Modeling Group in POLIMI. 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. Rotary Evaporation. Hazard. Control. Frost bite. Wear insulated gloves when handling dry . ice. Chemical spills. Secure the clamp on the collection . flask,. and secure the bump trap. Always . wear PPE. K. p. ).. Computation of Potential and Actual Evapotranspiration (ET) status by using pan evaporation data and . K. p. value.. 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).