Laserfiche WebLink
<br />31, <br /> <br /> <br />001852 <br /> <br />the arid._West, however, where water supplyfor stock ponds is depen- <br /> <br />dent largel'y on wet weather sprit).gs and on surface runoff from areas <br /> <br />of highly variable soils, vegetation, and rainfall, one must conclude <br /> <br />that an accurate estimate of water supply from precipitation and pre- <br /> <br />cipitation-runoff relations is not yet practical. The paucity of basic <br /> <br />information is a further handicap in making s.u.ch estimates. <br /> <br />When wa~er supply for the stock I?ond is from spring snowmelt, <br /> <br />. rather satisfactory e,stimates of the supply can be made from avail- <br /> <br />able information on snowpacks and their annual variation, together <br /> <br />with snowpack rlinoff relations. Thes.e relations have been estab- <br /> <br />lished for many areas by the Soil Conservation Service, 'Weather <br /> <br />Bureau, andStates, and lqcal agenQies. <br /> <br />Estimates of water supply from areas.where the supply occur.s <br /> <br />largely as surface runoff i~ high intensity storms involves: know- <br /> <br />. ledge of the varying infiltration capacities of the soils as affected by <br /> <br />vegetation, antecedent rairrlalland storm characteristics, know- <br /> <br />ledge of the local precipitation intensities and their areal distribu- <br /> <br />tion and frequency, and knowledge of the interrelatio.nship of soil <br /> <br />moisture deficien.cies and precipitation inth.e loc.al area. In gener- <br /> <br />ai, two methods- of utilizin.g tpts information to estimate water supply <br /> <br />are employed: In one method, the rainfall excesS is estimated by <br /> <br />subtracting from the allticipated precipitation intensity losses from <br />