Laserfiche WebLink
<br />iii <br /> <br />Survey, resurvey of an abandoned measurement site, matches of historical <br /> <br />ground-level photography, and analysis of historical aerial photography within a <br /> <br />geographic information system. We have developed analytical techniques that <br /> <br />permit analysis of width data from U.S. Geological Survey discharge <br /> <br />measurements where gaging cross sections are adjustable. These techniques <br /> <br />allow the spatially rich but temporally poor data from aerial photographs to be <br /> <br />supplemented with gaging station data which can add detail about the timing <br /> <br />and actual processes of channel narrowing that cannot be determined from <br /> <br />aerial photographs alone. Such an analytical strategy provides a more <br /> <br />complete record of historical channel adjustment than .can be obtained by other <br /> <br />means. <br /> <br />KEY WORDS: Geomorphology, sediment transport, channel narrowing, dams, <br />tamarisk <br />