OCR Text |
Show Testimony in the record 84 as follows shows ( dearly dlearly ) that the greater part of the ( time tinie ) the San Juan ( Raver Uver ) is extremely shallow : Jones ( Vol . 3 , page 371 ) ; Adams ( Vol . 3 , page 432 ) ; Nielsen ( Vol . 3 , ( page patre ) 445 ) ; Raplee ( Vol . 3 , page 468 ) ; Blake ( Vol . 5 , page 890 ) ; Newkirk ( Vol 4 , page 582 ) ; Hyde ( Vol . 4 , page 615 ) ; ( Weatherills AVeatherills ) ( Vol . 9 , pages 1601 , 1655 , 1665 ) ; Hyde ( Vol . 9 , page 1689 ) ; Rust ( Vol . 10 , page 1837 ) ; - Zahns ( Vol . 11 , pages 2042 , 2077 ) ; Allen ( Vol . 12 , page 2239 ) ; Loper ( Vol . 12 , pages 2313 , 2332 ) ; ( Bennett Benuett ) ( Vol . ( 17 1.7 ) , page 3223 ) ; ( Miser Nliser ) ( Vol . 21 , pages 3764 , 3767 , 3790 ) . Silt and sediment In ( Uscussing'the Uscussingthe ) ( formation foriiiation ) ( and wid ) transportation of silt and sediment in the Colorado , Green , and San Juan Rivers , consideration must be given to the climatic and topographic conditions existing in their basins . The region is distinctly arid ( and aud ) therefore there is little plant life to act as a ( pro- pro ) tective blanket to the surface . Consequently , the precipitation , which often occurs in the form ( of' of ) heavy downpour , runs off rapidlyand carries ( with witli ) it soil ( which wbich ) later appears in the rivers as ( sediment sedimeut ) . Love states ( ( San Sail ) Juan , Vol . 21 , p . 3824 ) that the , ( amount amouiit ) of silt varied ( from froni ) less than 1 per cent on . ( September Septeraber ) 20 , 1929 , to over 40 per cent by weight on September 21 , 1929 , following a rain of over / inch on the 20th with no rain for 8 days prior . . ( U . S . Weather Bureau , September , 1929 . ) |