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Effects of agricultural conservation practices on oxbow lake watersheds in the Mississippi River alluvial plain
limnology management systems evaluation area nutrients pesticides sediment water quality
2015/3/9
Agricultural lands are considered to be a major source of nonpoint source pollutants such as sediment, pesticides and nutrients in the United States. Conservation practices have been tested for their ...
Effects of watershed and riparian zone characteristics on nutrient concentrations in the River Scheldt Basin
riparian zone watershed River Scheldt Basin
2009/5/15
The relative influence of a set of watershed characteristics on surface water nutrient concentrations was examined in 173 watersheds within two subcatchments (Upper-Scheldt and Nete) of the River Sche...
Participatory scenario development for integrated assessment of nutrient flows in a Catalan river catchment
nutrient flows Catalan river catchment
2009/5/13
Rivers in developed regions are under significant stress due to nutrient enrichment generated mainly by human activities. Excess nitrogen and phosphorus emissions are the product of complex dynamic s...
Hydrologic and landscape changes in the Middle Ebro River (NE Spain)：implications for restoration and management
Middle Ebro River river-floodplain
2009/4/27
The changes of landscape (1927–2003), discharge regime and anthropic activities with the river-floodplain of one reach at the Middle Ebro River (NE Spain) were investigated with the objective to ident...
Quantitative approach and problems of river hydrological simulation models
distributed model pseudo-physical model infiltration retention soil pores
2009/4/2
A distributed hydrological model instead of a lumped model has been proposed as the most important tool in enabling the sharing of water information. In essence, a distributed model consists of sub-ba...
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...
Rock surface structures affect the microbial community in a river
rock type surface structure crack size microbial community river
2009/4/2
The microbial community detected in the biofilm of two types of riverbed stone, mudstone and sandstone, were compared for bacterial community composition and LV-SEM observation. The surface microbial ...
Rare earth element geochemistry in acid river water from the Numajiri drainage system, Fukushima Prefecture, Japan
Kerare earth elements hot spring ICP-MS geochemistry Numajiri
2009/4/2
Acid river water samples collected from the Numajiri drainage system, Fukushima Prefecture, Japan, were analyzed for rare earth elements (REE) and major chemical components to elucidate the origin and...
Metal speciation in natural river waters: measurement by diffusive gradients in thin-films and estimation by chemical equilibrium model
Speciation DGT
2009/4/1
Metal bioavailability of and toxicity to aquatic organisms depend on their speciation. The chemical speciation of Ni, Cu, and Zn in two Japanese rivers was measured by diffusive gradients in thin-film...
Life cycle of the burrowing mayfly Ephoron shigae (Ephemeroptera, Polymitarcyidae) in Hino-yosui population of the Tama-gawa River basin
egg bank diapause
2009/4/1
Ephoron shigae, a mayfly distributed widely in Japan, displays some characteristics of interest to evolutionary biologists.
Prediction for temporal changes of cell concentration of the cyanobacterium Microcystis in Tenryu River, using the fluid dynamic model of cyanobacteria
range of the shift determination of initial concentration of Microcystis
2009/4/1
A toxic cyanobacterial bloom caused by Microcystis occurs from spring to autumn in Lake Suwa, a eutrophic lake in Japan. The distribution of Microcystis cells in the Tenryu River flowing from Lake Suw...
Environmental characteristics of water quality in wetlands of the upper Takkobu River
water quality phosphorus
2009/4/1
To gather information about nutrient loadings in wetlands in the basin of eutrophied Lake Takkobu, we investigated water quality in the wetlands of the upper Takkobu River which suffers little or no h...
Predominance of Stenopsyche marmorata Navas larvae immediately downstream of Iwaonai Dam in the Teshio River, Hokkaido, Japan
dam reservoir
2009/4/1
We examined the density of aquatic invertebrates downstream from Iwaonai Dam in the upper reach of the Teshio River, Hokkaido.
Chemical study of river waters in U.S.military central training area of Okinawa Island
river water chemical composition
2009/4/1
Many U.S.military bases are located in the central and northern parts of Okinawa Island. A study on the river waters in such military training areas has been difficult to conduct until now. However th...
Continuous spatial observations of the water quality of Lake Biwa and the Yasu River were conducted during 1997 and 1999.