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Contributions of Snow to the Annual Water Balance in Moshiri Watershed,Northern Hokkaido,Japan
Contributions of Snow Annual Water Balance Moshiri Watershed
2009/10/23
Characteristics of the water balance were investigated in an experimental watershed
where there is a seasonal snow cover. To estimate the basin-wide snowmelt
by the heat balance method, seven observ...
An overview of experiences of basin artificial recharge of ground water in Japan
Artificial recharge of ground water Aquifer Alluvial fan Paddy field Snowfall
2009/7/14
In this paper, the author reviews the present situation of basin artificial recharge of ground water (MAR: managed aquifer recharge) as of 2007 in Japan. Most of the artificial recharge of basin metho...
Change of groundwater environment and problems in large urban areas in Japan
Urbanization Groundwater environment Groundwater management Groundwater flow Long term fluctuation
2009/7/14
Urbanization affects quantitatively and qualitatively groundwater environment in urban area. Especially, groundwater environment in large urban area has been changed more than several decades. However...
Isotopic altitude effect and discharge characteristics of river water in Yakushima Island, southwestern Japan
Yakushima Island River water Altitude effect Stable isotopic composition
2009/7/14
Isotopic compositions were analyzed to grasp the altitude effect observed in and the discharge characteristics of river water in Yakushima Island, southwestern Japan. The isotopic characteristics of t...
Estimation of the Impact of Global Warming on Snow Depth in Japan by the Pseudo-Global-Warming Method
High-Snow-Cover Low-Snow-Cover Pseudo-Global-Warming Method
2009/4/13
A series of numerical experiments were conducted in order to investigate the impact of global warming on snow amount in Japan during early winter. After confirming the accuracy of hindcast simulations...
Importance of wind-induced undercatch adjustment in a gauge-based analysis of daily precipitation over Japan
wind-induced daily precipitation gauge-based analysis
2009/4/13
We produced a new gauge-based analysis of daily precipitation over Japan from 1981 to 2000 on a 0.01° grid. Wind-induced undercatch was adjusted at each observation station, and orographic effects wer...
Toward flood risk prediction：a statistical approach using a 29-year river discharge simulation over Japan
29-year river discharge simulation flood risk prediction statistical approach
2009/4/13
A statistical approach that considers the bias and uncertainty of models is proposed for interpreting the simulated river discharge as a flood risk. A 29-year simulation was performed to estimate para...
An Estimate of Local Bomb-Produced 36Cl Fallout Using the Depth Profile of Groundwater in the Tsukuba Upland, Central Japan
Groundwater Central Japan Tsukuba Upland
2009/4/13
The depth profile of 36Cl/Cl ratio in groundwater was investigated in the Tsukuba Upland of central Japan. The obtained results clearly show the influence of bomb-produced 36Cl; the highest 36Cl/Cl ra...
Potential maximum hydroelectric energy development in Japan
maximum hydroelectric Japan energy development
2009/4/13
The recent population increase and economic development have increased the energy demand in many countries. As global fossil fuel reserves are limited, it is highly likely that the supply of fossil fu...
CO2 and H2O Fluxes Ratio in Paddy Fields of Thailand and Japan
H2O Fluxes CO2 flux Paddy Fields
2009/4/13
Measurements of CO2 flux (FCO2) and H2O flux (FH2O) were carried out on paddy fields of Thailand and Japan during the 2004, 2005 and 2006 growing seasons using the Bowen ratio technique. The objective...
Gammaridean fauna on a red alga Gracilaria asiatica and a green alga Enteromorpha prolifera in a brackish lake, Nakaumi, western Honshu, Japan
Gammaridean fauna Gracilaria asiatica Enteromorpha prolifera Nakaumi brackish lake
2009/4/2
In the year 2002, from May to June and October to December, 10 gammaridean species (in total 3117 individuals belonging to seven families) were collected on a red alga Gracilaria asiatica and a green ...
Occurrence patterns of the gametophyte of Thorea okadae (Rhodophyta) in the Yasumuro River, Kamigori, Hyogo Prefecture, Japan, with special reference to variations in river-water discharge
flood discharge freshwater red alga gametophyte Thorea okadae Yasumuro River
2009/4/2
Thorea okadae, a freshwater red alga (Rhodophyta), was found in the Yasumuro River, Kamigori, Hyogo Prefecture, on January, 2004. Although this species was initially found in 1991, it had not been enc...
Confirmation of surface area of the southern basin of Lake Biwa Japan
southern basin of Lake Biwa surface area
2009/4/2
We confirmed assumptions that had been used in the literatures for calculating the surface area of the southern basin of Lake Biwa. The area of 58 km2 generally use still in had been estimated based u...
Horizontal distribution and natural resource of seagrass in brackish Lake Obuchi, Aomori Prefecture, Japan
brackish Lake Obuchi seagrass Zostera marina Zostera japonica horizontal distribution natural resource
2009/4/2
The horizontal distribution and quantity of natural resources of seagrass (Zostera marina and Zostera japonica) in brackish Lake Obuchi, located in the center of the Shimokita Peninsula in Aomori Pref...
Researches on red snow “Akashibo” in the Ozegahara mire Central Japan: occurrence of invertebrates in red snow “Akashibo”
red snow Ozegahara mire Akashibo Harpactioida invertebrate
2009/4/2
Various invertebrates, nematodes, oligochaetes, harpacticoids, tardigrades, cladocerans, mites, larvae of dipteran insects (tipulids, ceratopogonids and chironomids), appeared internivean and supraniv...