OCR Text |
Show Fortier and Blaney , Technical 121 Bulletin No . 67 , Department of Agriculture ( Compl . Exhibit 68 , page 5 ) : The greater part of the basin , and more particularly that part just below the mouth of Green River , is subject to sudden violent rainstorms and resulting floods erode and carry off the unprotected surface soils . Most of the storms deluge small areas and their erosive action is proportionally limited but occasionally extensive areas receive downpours causing floods in several streams which ( trans trans- trans ) ¬ port large quantities of ( debris d6bris ) . Variation in depth To a limited extent the variations in flow are an index to the variations in depths . In no sense do the conditions at gaging stations represent average conditions of depth ( M . R . 98 , Exception , 37 , 38 ) of the rivers . The Master has attempted to arrive at depth by using a scaled width , but this is erroneous , because in his calculations he has failed to include the velocity . The velocity of the rivers changes with every stage of the water . Boulders , sand bars , and other obstructions change the slope of the water surface and increase the velocity . By his method of ( calculation calculatio'n calculation ) the Master has arrived at a depth of 3 feet or over for more than 312 days each year . The error of this conclusion , if the Master intends that it apply to the section of the Green River in controversy ( Exception 39 ) , appears most pointedly when the experience of boatmen shows frequent groundings of row boats and light motor boats . |