{"_buckets": {"deposit": "779f0334-301c-4e76-880b-182c6cde5ae9"}, "_deposit": {"id": "6976", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "6976"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00006976"}, "item_10_alternative_title_19": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u8a00\u8a9e\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "STUDY ON BED-DEGRADATION AND BANK-EROSION IN STRAIGHT GRAVEL CHANNEL DUE TO CHANGES IN BOUNDARY CONDITIONS"}]}, "item_10_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2001-08", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "II-56", "bibliographicPageEnd": "46", "bibliographicPageStart": "35", "bibliographicVolumeNumber": "684", "bibliographic_titles": [{"bibliographic_title": "\u571f\u6728\u5b66\u4f1a\u8ad6\u6587\u96c6"}]}]}, "item_10_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "\u5830\u306e\u64a4\u53bb\u3084\u6cb3\u5ddd\u6539\u4fee\u3068\u3044\u3063\u305f\u5883\u754c\u6761\u4ef6\u306e\u5909\u5316\u306b\u3088\u3063\u3066\u6cb3\u5e8a\u306f\u5927\u304d\u304f\u5909\u5316\u3059\u308b\u3002\u672c\u7814\u7a76\u3067\u306f\u3001\u5074\u5cb8\u4fb5\u98df\u3068\u6cb3\u5e8a\u4f4e\u4e0b\u304c\u540c\u6642\u306b\u751f\u3058\u308b\u5834\u5408\u306e\u76f4\u7dda\u7802\u792b\u6cb3\u9053\u306e\u5909\u5316\u904e\u7a0b\u3092\u3001\u6c34\u7406\u5b9f\u9a13\u3068\u5e73\u97622\u6b21\u5143\u306e\u6cb3\u5e8a\u5909\u52d5\u89e3\u6790\u3092\u7528\u3044\u3066\u691c\u8a0e\u3057\u305f\u3082\u306e\u3067\u3042\u308b\u3002\u6c34\u7406\u5b9f\u9a13\u306e\u7d50\u679c\u3001\u6cb3\u5e8a\u4f4e\u4e0b\u304c\u6d41\u8def\u62e1\u5e45\u306b\u5927\u304d\u304f\u5f71\u97ff\u3055\u308c\u308b\u3053\u3068\u304c\u308f\u304b\u3063\u305f\u3002\u307e\u305f\u3053\u306e\u3088\u3046\u306a\u6cb3\u5e8a\u4f4e\u4e0b\u904e\u7a0b\u306f\u3001\u6d41\u8def\u62e1\u5e45\u306e\u52b9\u679c\u3092\u53d6\u308a\u8fbc\u3080\u3053\u3068\u306b\u3088\u308a\u3001\u5f93\u6765\u304b\u3089\u7528\u3044\u3089\u308c\u3066\u3044\u308b\u62e1\u6563\u578b\u306e\u6cb3\u5e8a\u5909\u52d5\u3068\u3057\u3066\u8fd1\u4f3c\u7684\u306b\u53d6\u308a\u6271\u3048\u308b\u3053\u3068\u3092\u660e\u3089\u304b\u306b\u3057\u305f\u3002\u3055\u3089\u306b\u3001\u3053\u308c\u3089\u306e\u72b6\u6cc1\u3092\u3088\u308a\u8a73\u3057\u304f\u8003\u5bdf\u3059\u308b\u305f\u3081\u3001\u5074\u5cb8\u306e\u4fb5\u98df\u3084\u5d29\u843d\u306b\u4f34\u3046\u7802\u792b\u6cb3\u5cb8\u62e1\u5e45\u904e\u7a0b\u3092\u518d\u73fe\u3067\u304d\u308b\u5e73\u9762\u306b\uff12\u6b21\u5143\u6cb3\u5e8a\u5909\u52d5\u89e3\u6790\u30e2\u30c7\u30eb\u3092\u69cb\u7bc9\u3057\u305f\u3002\u3053\u306e\u30e2\u30c7\u30eb\u306b\u3088\u308b\u8a08\u7b97\u7d50\u679c\u3068\u5b9f\u9a13\u7d50\u679c\u3068\u306e\u9069\u5408\u6027\u306f\u826f\u597d\u3067\u3042\u3063\u305f\u3002In this research, horizontal bed-topography due to dam-construction or large-scale river improvement was studied as simplified processes of bed degradation with side-bank erosion, through flume experiments and numerical analysis. Firstly, we investigated the interaction between widening of gravel channel and degradation of channel bed with hydraulic model experiment. As a result, it was understood that the conventional diffusion model of the degradation with a modified diffusion coefficient could be applied even if the channel widening accompanies. Secondary, we constructed the 2-D numerical simulation model taking account of the widening process with bank erosion in a gravel channel, and examined the application of the numerical model by using the experimental data. 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