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Ikeda, Makoto; Munakata, Masahiro; Sakai, Ryutaro; Fuchiwaki, Hirotaka; Kimura, Hideo; Matsuba, Hisashi*
Nihon Chikasui Gakkai 2010-Nen Shuki Koenkai Koen Yoshi, p.282 - 287, 2010/11
no abstracts in English
Fuchiwaki, Hirotaka; Matsuba, Hisashi; Munakata, Masahiro
no journal, ,
This study was conducted to develop methodologies of regional scale to be assessed for long-term groundwater flow systems. Through the GIS techniques, this study is being advanced. As the application case, at crystalline rock distribution area 3 examples and sedimentary rock distribution area 1 example, this study was executed respectively. In regard to latter 1 example, concerning the analytical object range when future topographical sea level change is considered it examined. As a result, concerning the analytical range for the underground water flow analysis presently for topography, what can set the analytical territory in the rational range making use of the GIS analytical result was found. In addition, it was found that supposition of the time scale is important concerning the analytical range which considers future topographical change and sea level change.
Munakata, Masahiro; Fuchiwaki, Hirotaka; Sakai, Ryutaro; Hanatani, Ikuo; Kimura, Hideo
no journal, ,
A long-term groundwater flow for reginal area of sedimentary rock was studied in order to develop the safety assessment code for groundwater flow. The area (40
50 km) consists of sandstone and mudstone with the monoclinal structure of their layers. The hydraulic data of the stratum was used from existing surveys and literatures. In addition, taking account of the geomorphic changes in long-term evaluation, uplift and erosion data in this area was adopted in the analysis. Analytical results show that the groundwater flow velocity after 100,000 years is increased by 5% in the 500 m depth of the center of the domain because of increasing hydraulic gradient caused by the geomorphic changes.
Kimura, Hideo; Munakata, Masahiro; Hanatani, Ikuo; Sakai, Ryutaro; Fuchiwaki, Hirotaka; Matsuba, Hisashi
no journal, ,
no abstracts in English
Fuchiwaki, Hirotaka; Namekawa, Maki; Munakata, Masahiro; Kimura, Hideo
no journal, ,
no abstracts in English
Munakata, Masahiro; Kimura, Hideo; Sakai, Ryutaro; Namekawa, Maki; Fuchiwaki, Hirotaka
no journal, ,
no abstracts in English
Fuchiwaki, Hirotaka; Munakata, Masahiro; Kimura, Hideo; Imai, Hisashi*; Shiozaki, Isao*; Yamashita, Ryo*
no journal, ,
It is thought that in an external factor that influences the underground flow, there is a climatic variation repeated at the cycle of the order of 100,000 years, the following phenomena are caused by this climatic variation, and it influences the underground flow. It is thought that the following phenomena are caused by this climatic variation, and it influences the underground flow. (1) Development and disappearance of glacier, (2) Change in precipitation, (3) Decrease in amount of training because of development of frozen soil, (4) Sea-level rhythms, (5) Upheaval and erosion by gaining the weight to the earth's crust according to development of river and disappearance, (6) Dilution of seawater according to glacier disappearance, etc. The analytical result and the evaluation are announced.
Namekawa, Maki; Munakata, Masahiro; Fuchiwaki, Hirotaka; Kimura, Hideo
no journal, ,
no abstracts in English