Laserfiche WebLink
<br />of snowfall due only to the upward vertical motion forced as air moves over the topograph. <br /> <br />These two set of conditions can produce complex patterns of snow on the ground which are then <br /> <br />followed by the conditions which lead to snowmelt and runoff. <br /> <br />One question often asked is how is the winter snow correlated to the following summer <br /> <br />precipitation. Table 15 provides the answer to this question. These correlations show very little <br /> <br />relationship between the winter snow and following summer precipitation. Again the numbers in <br /> <br />circles are for the same basins. <br /> <br />The correlations of April! SSI to streamflow (ST) and 12 month September 30 SPI to <br /> <br /> <br />streamflow (ST) are given in Tables 16 and 17. These again show some relationship between the <br /> <br /> <br />variables. The SSI to streamflow (ST) are the basis of work done by the Natural Resource <br /> <br /> <br />Conservation Service (NRCS) ofthe USDA to forecast streamflow (ST) ( need reference here) . <br /> <br /> <br />However, they use both April and May snowpack observation and more sophisticated statistical <br /> <br /> <br />techniques to develop forecast relationships. Consequently, their forecast are better than the <br /> <br />simple correlation results given here. <br /> <br />25 <br />