{"created":"2023-05-15T13:38:20.170887+00:00","id":2257,"links":{},"metadata":{"_buckets":{"deposit":"b48c6181-947b-4125-a18f-f738ea060289"},"_deposit":{"created_by":12,"id":"2257","owners":[12],"pid":{"revision_id":0,"type":"depid","value":"2257"},"status":"published"},"_oai":{"id":"oai:repository.naro.go.jp:00002257","sets":["87:661:662:135:224"]},"author_link":["256"],"item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2007-03-01","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"48","bibliographicPageStart":"1","bibliographicVolumeNumber":"46","bibliographic_titles":[{"bibliographic_title":"農村工学研究所報告"},{"bibliographic_title":"Bulletin of the NARO, Rural Engineering","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Recently, groundwater control technology is applied to various usages such as the artificial recharge, prevention of landslides, and subsurface dams. It is necessary to understand heterogeneity in the ground because the groundwater might flow unexpectedly by heterogeneity in the ground on these sites. In this study, to contribute to the design, construction, and the evaluation of the groundwater control technology, the auther proposed the investigation method that used radioisotope according to each site, and investigated heterogeneity of the ground such as the macropore, the crack, the pore filling of the aquifer, and the degree of weathering, etc. in facilities to control the groundwater flow. To decrease the measurement error of the neutron moisture meter for the site investigation, low speed with an automatic winch and a continuous procedure for measurement were developed. It was confirmed that the measurement error of the automatic measurement was lower than that of the manual measurement. 4 investigations were carried out in the sites where groundwater control facilities were under construction or under planning. The results were as follows. 1) The mechanisms of preferential flow and recharge to groundwater through macropores of sand and gravel aquifer were investigated in the experimental artificial recharge site with recharge pit (2m in diameter and 3m in depth) in Uonuma upland, Niigata Pref. Groundwater dynamics in two experiments of artificial recharge for 10 hours/day × 5 days were monitored by tracer test, neutron moisture logging and radon concentration measurements in groundwater near groundwater table. Tracer test in the first experiment showed that the groundwater table started to increase after 2.5 hours of artificial recharge and the tracer was detected after 3.5 hours and the concentration of the tracer peaked after 9.5 hours. The second experiment showed as follows. The neutron moisture logging revealed that the parts of increasing water contents with several percent in unsaturated zone gradually moved from shallow zone to deep zone and the down-movement velocity of wetting front was 0.9m/h in a shallower zone than 6m in depth, and was 2.6m/h in a deeper zone than 6m in depth. The difference of the velocity may relate with the difference of the saturated hydraulic conductivity of two zones. The decreasing radon concentration near the groundwater table gradually occurred from 7 hours after artificial recharge, while the increasing of groundwater level began from 6 hours after artificial recharge. The down-movement velocity of preferential flow is three times bigger than the velocity presumed from the saturated hydraulic conductivity values. It was assumed that the groundwater level started increasing when the tracer and the recharge water through macropores reached a capillary zone. 2) In order to develop the evaluation method for the drainage effect by drain tunnel, monitoring of water content using neutron moisture logging in the drainage boring pipe and environmental isotope concentrations (Tritium and Radon: 222Rn) in groundwater from the drainage boring pipes were carried out after the construction of drain tunnel for 19 months and five years respectively. The drain tunnel is 1.25m (diameter) × 500m (length) at 50m underground with drainage boring pipes, which are expected to drain superfluous water around the sliding surface of an active landslide in Tertiary mudstone area, Niigata Prefecture. Consequently, the monitoring of water content showed a remarkable decreasing with about 8 ％ of water content around the sliding surface for the first four months and subsequently slight decreasing. The tendency of decreasing of water content corresponds with the fluctuation pattern of discharge water volume from drainage boring pipes. The monitoring of tritium and 222Rn concentrations reveled that the groundwater around the tunnel was recharged from rain before 10 years and the unsaturated zone around tunnel was occurred. These change of groundwater flow after construction of drain tunnel certifies that the monitoring techniques are useful methods for evaluation of the effect by the drain tunnel. 3) To determine the site of wells in the catchment area of subsurface dam, relation between permeability of limestone aquifer and distribution of infiltrated clay, witch closed the pore of the limestone and decreased its hydraulic conductivity and the permeability, was investigated by observation of boring cores and pumping tests obtained at 26 points. In addition, 3H concentrations in groundwater were measured every 5m depth in Shirakawada catchment at 3 observation wells to study the mixing of groundwater under natural conditions. The vertical distribution of 3H in observation wells showed that groundwater was well mixed under natural lateral groundwater flow conditions. As the result of the comparison between the infiltrated clay content and the hydraulic conductivity it was clarified that the infiltrated clay content and the hydraulic conductivity have a negative, high correlation, and permeability can be assumed from the infiltrated clay content. 4) To measure the degree of weathering in the bedrock more quickly and economically, the radioactive prospecting and the investigation of the degree of weathering in the bedrock were carried out in the southern Kitakami massif region where granitic rocks are distributed in Iwate Prefecture. The result showed that 40K/208Tl gamma ray counting ratio and 214Bi/208Tl gamma ray counting rate had a positive correlation with the degree of weathering of granite. This result also showed that the radioactive prospecting was effective to the investigation of the degree of weathering. Subsequently, the technology that investigates the chemistry of the ground in the large area by nondestructive, car-borne radioactive prospecting method has been developed. The radioactive prospecting was carried out using this method in the North-Kanto region. 214Bi gamma ray counting rate were compared with 238U concentration, which had been investigated in the past. This result showed that 214Bi gamma ray counting ratio had a positive correlation with 238U concentration. This result also showed that the radioactive prospecting was effective in mapping concentration of the element of 238U. The common feature of these investigations was to have evaluated the heterogeneity by using radioisotopes as one of the indicators that showed the heterogeneity of the bedrock. The multiple investigation technique including the investigation of radioisotope used by this study is effective to the investigation of the heterogeneity of the ground.","subitem_description_type":"Abstract"}]},"item_10002_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.24514/00002159","subitem_identifier_reg_type":"JaLC"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"独立行政法人 農業・食品産業技術総合研究機構 農村工学研究所"}]},"item_10002_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.24514/00002159","subitem_relation_type_select":"DOI"}}]},"item_10002_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1882-3262","subitem_source_identifier_type":"ISSN"}]},"item_10002_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"石田, 聡"},{"creatorName":"イシダ, サトシ","creatorNameLang":"ja-Kana"},{"creatorName":"ISHIDA, Satoshi","creatorNameLang":"en"}],"nameIdentifiers":[{},{},{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-03-20"}],"displaytype":"detail","filename":"nkk_report_No46p1-48p.pdf","filesize":[{"value":"31.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"nkk_report_No46p1-48p.pdf","url":"https://repository.naro.go.jp/record/2257/files/nkk_report_No46p1-48p.pdf"},"version_id":"171f2db4-45ae-496f-9cf4-ecc5700d2058"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"地下水","subitem_subject_scheme":"Other"},{"subitem_subject":"ラドン","subitem_subject_scheme":"Other"},{"subitem_subject":"トリチウム","subitem_subject_scheme":"Other"},{"subitem_subject":"中性子水分検層","subitem_subject_scheme":"Other"},{"subitem_subject":"放射能探査","subitem_subject_scheme":"Other"},{"subitem_subject":"地すべり","subitem_subject_scheme":"Other"},{"subitem_subject":"人工かん養","subitem_subject_scheme":"Other"},{"subitem_subject":"地下ダム","subitem_subject_scheme":"Other"},{"subitem_subject":"石灰岩","subitem_subject_scheme":"Other"},{"subitem_subject":"花崗岩","subitem_subject_scheme":"Other"},{"subitem_subject":"硝酸態窒素","subitem_subject_scheme":"Other"},{"subitem_subject":"浸透","subitem_subject_scheme":"Other"},{"subitem_subject":"風化","subitem_subject_scheme":"Other"},{"subitem_subject":"元素マッピング","subitem_subject_scheme":"Other"},{"subitem_subject":"groundwater","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"radon","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"tritium","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"neutron moisture logging","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"radioactive prospecting","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"landslide","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"artificial recharge","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"subsurface dam","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"limestone","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"granite","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"nitrate nitrogen","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"infiltration","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"weathering","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"element mapping","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"地下水流動制御施設設計のための地盤の不均質性の解明に関する研究 : 放射性同位体測定等の複合調査法を用いて","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"地下水流動制御施設設計のための地盤の不均質性の解明に関する研究 : 放射性同位体測定等の複合調査法を用いて"},{"subitem_title":"Studies to Clarify Heterogeneity of Ground for Design of Facilities to Control Groundwater Flow : Using Multiple Investigation Methods of Radioisotopes etc","subitem_title_language":"en"}]},"item_type_id":"10002","owner":"12","path":["224"],"pubdate":{"attribute_name":"公開日","attribute_value":"2019-03-22"},"publish_date":"2019-03-22","publish_status":"0","recid":"2257","relation_version_is_last":true,"title":["地下水流動制御施設設計のための地盤の不均質性の解明に関する研究 : 放射性同位体測定等の複合調査法を用いて"],"weko_creator_id":"12","weko_shared_id":12},"updated":"2023-05-15T16:06:36.400658+00:00"}