Hiroyuki Ii - Profile on Academia.edu (original) (raw)

Papers by Hiroyuki Ii

廃棄鉱山の掘削地域における地下水流システムのモデリング【JST・京大機械翻訳】

Journal of Contaminant Hydrology, 2020

Dispersion Coefficients of Unsaturated Sand Determined by Salt Accumulation Analysis (Proceedings of the International Conference on Desert Technology 4) -- (New Technologies for the Rehabilitation of Arid Areas)

沙漠研究, Mar 1, 1998

Environmental geology, Apr 1, 1996

Effective porosity value was analyzed from the tritium concentration of sampled groundwater using... more Effective porosity value was analyzed from the tritium concentration of sampled groundwater using a three-dimensional groundwater-flow and advection-dispersion code based on the finite element method. The effective porosity value was about 10%. Porosity values measured from core samples were 7-15%. The groundwater flow velocity estimated from the tritium concentrations was about 1 x 10-5 cm s-1. Therefore, during the low groundwater flow velocity condition, effective porosity and porosity values were the same. At the same test site, a 0.48% effective porosity value, determined by another tracer test injecting Br-solution into the aquifer during groundwater level change, was smaller than the porosity value when the flow velocity was 1.8 x 10-2 cm s-1. Thus the effective porosity value is concluded to be due to groundwater flow velocity. The specific yield value was calculated to be 0.6% by the total volume of tunnel seepage water and the total volume of the rock unsaturated during tunnel construction. However, as pore water continued to be drained after the groundwater level change was completed, the specific yield value became larger than 0.6%. Thus specific yield value is concluded to be due to drainage time.

Groundwater tracer test of a sedimentary formation by three-dimensional analysis using FEM at the Matsumoto tunnel

Soil Erosion in the Loess Plateau and Nitrogen Compounds in Dust

415 Chemical properties of groundwater from tunnel in volcanic sedimentary rocks in Matsumoto city

日本地質学会学術大会講演要旨, Mar 25, 1992

Living Limits of Dragonely Larva in Rivers with Domestic Sewage Inflow in the Southern Part of Osaka

Journal of hydroscience and hydraulic engineering, Nov 1, 2007

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Corrigendum to “Drought stress alters iron accumulation in Sorghum bicolor seeds” [Environ. Exp. Bot. 204 (2022) 105093]

Environmental and Experimental Botany, Apr 1, 2023

Influence of Flow Condition and Temperature on Numbers and Species of Phytoplankton in the Kinokawa River

Journal of hydroscience and hydraulic engineering, May 1, 2007

Drought stress alters iron accumulation in Sorghum bicolor seeds

Environmental and Experimental Botany, Dec 1, 2022

Effectiveness of Bryophytes and Cicada Shells as a Bio-Index for Heavy Metal Contamination of River Water and Soil

International journal of GEOMATE : geotechnique, construction materials and environment, Mar 26, 2023

Nitrogen Contamination and Acidification of Groundwater Due to Excessive Fertilizer Use for Tea Plantations

Geophysical monograph, Nov 18, 2022

Journal of the Mineralogical Society of Japan, 1991

Journal of groundwater hydrology, 1993

As, SR, ZN, Fe, MN, PB and Cu Concentrations of Seaweed at the Kii Peninsula, Japan

International journal of GEOMATE : geotechnique, construction materials and environment, 2016

Nitrogen Isotopes in Groundwater as Indicator of Land Use

Journal of The Japanese Society for Food Science and Technology-nippon Shokuhin Kagaku Kogaku Kaishi, 2010

Journal of groundwater hydrology, 1994