{"_buckets": {"deposit": "2c29bf3b-31f5-493d-a2f6-077b06b13612"}, "_deposit": {"id": "22375", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "22375"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00022375"}, "item_9_alternative_title_19": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u8a00\u8a9e\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "Mereoric-10Be of bed-sediments in rivers flowing to Lake Biwa"}]}, "item_9_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2016-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "94", "bibliographicPageStart": "89", "bibliographicVolumeNumber": "27", "bibliographic_titles": [{"bibliographic_title": "\u540d\u53e4\u5c4b\u5927\u5b66\u52a0\u901f\u5668\u8cea\u91cf\u5206\u6790\u8a08\u696d\u7e3e\u5831\u544a\u66f8"}]}]}, "item_9_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "Cosmogenic 10Be is produced by nuclear spallation in the atmosphere and falls to Earth\u0027s surface. 10Be is a useful geological tracer for determining soil age and surface erosion rate. Recently, it is reported that denudation rate can be calculated using the ratio of meteoric-10Be and 9Be in river sediments. The purpose of this study is to apply this approach to some Japanese rivers with smaller watersheds. 10Be/9Be ratios of eight bed-sediments in rivers flowing to Lake Biwa and three lake surface sediments were measured. Denudation rates (t/km2/yr) calculated from 10Be/9Be of river sediments ranged from 50 to 1179 t/km2/yr. The rates were low in rivers flowing through plane, while high in rivers flowing down mountainous area. This trend coincides with the denudation rate calculated from the standard deviation of altitude per unit area. Precipitation rates around each river showed a positive relationship with the denudation rate estimated from 10Be/9Be of river bed-sediments. The results indicate that 10Be concentration in river bed-sediments can be used as an indicator of precipitation and surface erosion of the catchment area. \u7435\u7436\u6e56\u306b\u6d41\u5165\u3059\u308b\u6cb3\u5ddd\u304a\u3088\u3073\u7435\u7436\u6e56\u6e56\u5e95\u306e\u8868\u5c64\u5806\u7a4d\u7269\u306e10Be \u304a\u3088\u3073 9Be \u6fc3\u5ea6\u306e\u5206\u6790\u3092\u884c\u306a\u3044\u3001\u6cb3\u5e8a\u5806\u7a4d\u7269\u306e10Be/9Be \u304b\u3089\u6cb3\u5ddd\u6d41\u57df\u6bcd\u5ca9\u306e\u6d78\u98df\u901f\u5ea6\u3092\u6c42\u3081\u305f\u3002 \u5806\u7a4d\u7269\u8a66\u6599\u306f\u30d0\u30eb\u30af\u3067\u5206\u89e3\u3057\u300110Be\u306fAMS\u30019Be\u306fICP-MS \u306b\u3088\u308a\u6e2c\u5b9a\u3057\u305f\u300210Be!9Be \u304b\u3089\u8a08\u7b97\u3055\u308c\u305f\u6cb3\u5ddd\u6d41\u57df\u6bcd\u5ca9\u306e\u6d78\u98df\u901f\u5ea6\u306f\u3001 \u6d41\u57df \u304c\u5c71\u5cb3\u5730\u5e2f\u3067\u3042\u308b\u307b\u3069\u5927\u304d\u304f\u3001 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