Item talk:Q258466

{

 "USGS Publications Warehouse": {
   "@context": "https://schema.org",
   "@type": "CreativeWork",
   "additionalType": "Conference Paper",
   "name": "Channel stability of Turkey Creek, Nebraska",
   "identifier": [
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse IndexID",
       "value": "70021313",
       "url": "https://pubs.usgs.gov/publication/70021313"
     },
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse Internal ID",
       "value": 70021313
     }
   ],
   "inLanguage": "en",
   "datePublished": "1998",
   "dateModified": "2012-03-12",
   "abstract": "Channelization on Turkey Creek and its receiving stream, the South Fork Big Nemaha River, has disturbed the equilibrium of Turkey Creek and has led to channel-stability problems, such as degradation and channel widening, which pose a threat to bridges and land adjacent to the stream. As part of a multiagency study, the U.S. Geological Survey assessed channel stability at two bridge sites on upper and middle portions of Turkey Creek by analyzing streambed-elevation data for gradation changes, comparing recent cross-section surveys and historic accounts, identifying bank-failure blocks, and analyzing tree-ring samples. These results were compared to gradation data and trend results for a U.S. Geological Survey streamflow-gaging station near the mouth of Turkey Creek from a previous study. Examination of data on streambed elevations reveals that degradation has occurred. The streambed elevation declined 0.5 m at the upper site from 1967-97. The streambed elevation declined by 3.2 m at the middle site from 1948-97 and exposed 2 m of the pilings of the Nebraska Highway 8 bridge. Channel widening could not be verified at the two sites from 1967-97, but a historic account indicates widening at the middle site to be two to three times that of the 1949 channel width. Small bank failures were evident at the upper site and a 4-m-wide bank failure occurred at the middle site in 1987 according to tree ring analyses. Examination of streambed-elevation data from a previous study at the lower site reveals a statistically significant aggrading trend from 1958-93. Further examination of these data suggests minor degradation occurred until 1975, followed by aggradation.",
   "publisher": {
     "@type": "Organization",
     "name": "ASCE"
   },
   "author": [
     {
       "@type": "Person",
       "name": "Rus, David L. dlrus@usgs.gov",
       "givenName": "David L.",
       "familyName": "Rus",
       "email": "dlrus@usgs.gov",
       "identifier": {
         "@type": "PropertyValue",
         "propertyID": "ORCID",
         "value": "0000-0003-3538-7826",
         "url": "https://orcid.org/0000-0003-3538-7826"
       },
       "affiliation": [
         {
           "@type": "Organization",
           "name": "Nebraska Water Science Center",
           "url": "https://www.usgs.gov/centers/nebraska-water-science-center"
         }
       ]
     },
     {
       "@type": "Person",
       "name": "Soenksen, Philip J. pjsoenks@usgs.gov",
       "givenName": "Philip J.",
       "familyName": "Soenksen",
       "email": "pjsoenks@usgs.gov"
     }
   ]
 }

}