<P>- <U><STRONG>Evapotranspiration</STRONG></U> is the process of water loss in vapour form from a unit surface of land both directly by evaporation from the ground and by transpiration through leaf surfaces during a specific period of time. </P> <P>- <STRONG><U>Soil moisture</U></STRONG> is defined as the water stored in or at the continental surface and available for evaporation. </P> 2008-09-04T14:11:59Z tag:www.emwis.net,2008-09-04:/topics/agriculture/ET http://www.emwis.net/misc_/SEMIDE/Site.gif Euro-Mediterranean Information System on know-how in the Water sector tag:www.emwis.net,2008-09-02:/topics/agriculture/ET/doc936252 2008-09-02T18:05:52Z Jauad El-Kharraz Jauad El-Kharraz

by <A href="http://www.unesco.org/water/">UNESCO Water Portal</A>.

tag:www.emwis.net,2008-09-02:/topics/agriculture/ET/basics-evapotranspiration 2008-09-02T18:05:52Z Jauad El-Kharraz Jauad El-Kharraz

<span> <div class="centrado"> By <a href="http://www.environmental-expert.com/author_file.aspx?idproducttype=6&amp;cmp=1&amp;idauthor=136814&amp;fname=Keith&amp;lname=Bellingham" class="enlaceNormal">Keith&nbsp;Bellingham</a> </div> </span> <span>Courtesy of <a href="http://www.environmental-expert.com/STSE_resultEach.aspx?cid=7850&amp;idproducttype=1&amp;idmainpage=0&amp;level=0">Stevens Water Monitoring Systems, Inc.</a></span> <span><br /> Originally published Aug. 2008</span> <br /> <span> <div style="width: 85%; text-align: justify"> Evapotranspiration (ET) represents the loss of water from the Earth&rsquo;s surface from the combination of direct evaporation and plant transpiration. ET is usually expressed as a rate such as inches per day. Knowledge of ET is important for irrigation scheduling but it is also an important factor for other land use applications such as septic tank drain fields, water shed water budgeting, and climate and weather models. ET can be used as a historical tool but usually it is predicted or used in a forecast to help irrigators optimize irrigation. </div> </span>