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GEOMATICS 23-01-2021
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drought
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File: whatis_drought.php
<?php include("session.php"); include("header.php"); ?> <title>Drought Management Support System</title> </head> <form action="whatis_drought.php?name=<?php echo $var ?>" method="post" > <body> <table style="text-align: left; width: 98%; height: 10%; margin-left: auto; margin-right: auto;" border="0" cellpadding="0" cellspacing="0"> <tr> <td background="image/back1.jpg"><table width="99%" border="0"> <tr> <td valign="top"><table width="98%" border="0"> <tr> <td><p><span class="style3"><strong>What is Drought?</strong></span></p> <p align="justify"> Drought is a naturally occurring event, causing temporary imbalance water availability and vegetation damage. It exists when the amount of precipitation has been significantly below normal recorded level. A Drought can be considered as a strictly meteorological phenomenon. It can be evaluated as a meteorological anomaly characterized by a prolonged and abnormal moisture deficiency. Not only does this approach avoid many of the complicating biological factors and arbitrary definitions, it enables one to derive a climatic analysis system in which drought severity is dependent on the duration and magnitude of the abnormal moisture deficiency. Within reasonable limits, time and space comparisons of drought severity are possible.<br /> Drought means various things to various people, depending on their specific interest. To the farmer drought means a shortage of moisture in the root zone of his crops. To the hydrologist it suggests below average water levels in streams, lakes, reservoirs, and the like. To the economist it means a water shortage which adversely affects the established economy. Each has a concern which depends on the effects of a fairly prolonged weather anomaly. </p> </td> <td width="40%"><div align="right"><img src="image/images4.jpeg" alt="" width="90%" height="270" align="absmiddle"> </div></td> </tr> </table> <p align="justify"> In general, drought originates from a deficiency of precipitation over an extended period of time, resulting in a water shortage for some activity, group, or environmental sector (NYSDPC, 2008). Other climatic factors, such as high temperature, prolonged high winds and low relative humidity, can aggregate the severity of a drought. These conditions are caused by anomalous weather patterns when shifts in the jet stream block storm systems from reaching an area. As a result, large high pressure cells may dominate a region for a prolonged period, thus reducing precipitation.</p> <p align="justify"> The institute for Catastrophic Loss Reduction (ICLR) indicates that the drought hazard differs from other natural hazards in several ways. First, there is no universally accepted definitions for drought. Second, drought onset and recovery are usually slow. Third, droughts also can cover a much larger region and last much longer than most other natural hazards. Due to these differences many communities have neglected to include this hazard in their disaster management plans (ICLR, Date Unknown).</p></td> </tr> </table></td> </tr> </table> </body> </html> <?php include("footer.php"); ?>