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Water infiltrated into soil is halted just above a boundary surface between the fine and coarse soil layers due to a physical difference in water retention characteristics of both layer soils. When the boundary surface between soil layers tilts, water retained flows along the boundary surface, and a downward movement of infiltration water into the soil below the boundary surface is restricted. Waterproof by the capillary barrier with a tilted boundary surface decreases rainwater infiltration into soil, and keep a soil slope stable because of small deterioration of soil strength due to wetting as well of small increase of soil mass. This special and attractive feature leads to a possible adoption of the capillary barrier as effective measures for slope protection of natural soil or embankment. In the study soil moisture contents were measured in sand soil layer underlain by gravel layer constructed in a natural sand slope. After a trench about 50cm wide was excavated in the natural sand slope, gravel was compacted into the layer of 10cm thickness in the trench, and then the sand excavated was put back and compacted into about 20cm thick layer. Inclination of the boundary surface between the soil layers was 20 degrees. The sand is classified into Sand with less-5% fine and coarse fractions, and the gravel is siliceous with typical particle size of 4 to 7mm. Dielectric probes ECH2O were employed to measure volumetric moisture contents at 15, 10, 5 and 1cm above and 1cm beneath the boundary surface between the soil layers. The volumetric moisture contents in the soil were measured during four months together with precipitation. The results showed effective waterproof by the capillary barrier of soil.", "subitem_description_type": "Abstract"}]}, "item_7_full_name_3": {"attribute_name": "\u8457\u8005\u5225\u540d", "attribute_value_mlt": [{"nameIdentifiers": [{"nameIdentifier": "163302", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Uehara, Rurika"}]}, {"nameIdentifiers": [{"nameIdentifier": "163303", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Kanda, Misa"}]}, {"nameIdentifiers": [{"nameIdentifier": "163304", "nameIdentifierScheme": "WEKO"}], "names": [{"name": "Morii, Toshihiro"}]}]}, "item_7_publisher_7": {"attribute_name": "\u51fa\u7248\u8005", "attribute_value_mlt": [{"subitem_publisher": "\u65b0\u6f5f\u5927\u5b66\u8fb2\u5b66\u90e8"}]}, "item_7_select_19": {"attribute_name": "\u8457\u8005\u7248\u30d5\u30e9\u30b0", "attribute_value_mlt": [{"subitem_select_item": "publisher"}]}, "item_7_source_id_11": {"attribute_name": "\u66f8\u8a8c\u30ec\u30b3\u30fc\u30c9ID", "attribute_value_mlt": [{"subitem_source_identifier": "AN00183393", "subitem_source_identifier_type": "NCID"}]}, "item_7_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "03858634", "subitem_source_identifier_type": "ISSN"}]}, "item_creator": {"attribute_name": "\u8457\u8005", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "\u4e0a\u539f, \u308b\u308a\u9999"}], "nameIdentifiers": [{"nameIdentifier": "163299", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "\u795e\u7530, \u7f8e\u6c99"}], "nameIdentifiers": [{"nameIdentifier": "163300", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "\u68ee\u4e95, \u4fca\u5e83"}], "nameIdentifiers": [{"nameIdentifier": "163301", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "\u30d5\u30a1\u30a4\u30eb\u60c5\u5831", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2019-08-20"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "61(2)_175-180.pdf", "filesize": [{"value": "2.1 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 2100000.0, "url": {"label": "61(2)_175-180.pdf", "url": "https://niigata-u.repo.nii.ac.jp/record/28387/files/61(2)_175-180.pdf"}, "version_id": "13ac2c7a-1d75-429c-846a-80b9c0574eac"}]}, "item_keyword": {"attribute_name": "\u30ad\u30fc\u30ef\u30fc\u30c9", "attribute_value_mlt": [{"subitem_subject": "\u6bdb\u7ba1\u906e\u65ad\u6a5f\u80fd", "subitem_subject_scheme": "Other"}, {"subitem_subject": "\u30ad\u30e3\u30d4\u30e9\u30ea\u30fc\u30fb\u30d0\u30ea\u30a2", "subitem_subject_scheme": "Other"}, {"subitem_subject": "\u96e8\u6c34\u6d78\u900f", "subitem_subject_scheme": "Other"}, {"subitem_subject": "\u659c\u9762", "subitem_subject_scheme": "Other"}, {"subitem_subject": "\u690d\u751f\u88ab\u8986", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Capillary barrier", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Rainwater infiltration into soil", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Soil slope", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Plant cover on soil", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "\u8a00\u8a9e", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "\u8cc7\u6e90\u30bf\u30a4\u30d7", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "\u571f\u306e\u6bdb\u7ba1\u906e\u65ad\u6a5f\u80fd\u3068\u690d\u751f\u306b\u3088\u308b\u5730\u76e4\u5185\u306e\u96e8\u6c34\u6d78\u900f\u6291\u5236\u52b9\u679c", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "\u571f\u306e\u6bdb\u7ba1\u906e\u65ad\u6a5f\u80fd\u3068\u690d\u751f\u306b\u3088\u308b\u5730\u76e4\u5185\u306e\u96e8\u6c34\u6d78\u900f\u6291\u5236\u52b9\u679c"}, {"subitem_title": "\u571f\u306e\u6bdb\u7ba1\u906e\u65ad\u6a5f\u80fd\u3068\u690d\u751f\u306b\u3088\u308b\u5730\u76e4\u5185\u306e\u96e8\u6c34\u6d78\u900f\u6291\u5236\u52b9\u679c", "subitem_title_language": "en"}]}, "item_type_id": "7", "owner": "1", "path": ["453/456", "485/872/1583/1599"], "permalink_uri": "http://hdl.handle.net/10191/13078", "pubdate": {"attribute_name": "\u516c\u958b\u65e5", "attribute_value": "2010-07-02"}, "publish_date": "2010-07-02", "publish_status": "0", "recid": "28387", "relation": {}, "relation_version_is_last": true, "title": ["\u571f\u306e\u6bdb\u7ba1\u906e\u65ad\u6a5f\u80fd\u3068\u690d\u751f\u306b\u3088\u308b\u5730\u76e4\u5185\u306e\u96e8\u6c34\u6d78\u900f\u6291\u5236\u52b9\u679c"], "weko_shared_id": null}