N-loads from subsurface, drains, and groundwater-fed surface (bypass) flows via two riparian zones (crop field wetland) to a second order stream were investigated by sampling of shallow deep groundwater on both sides monthly measurements bypass springs, including water quality (nitrate). A push-pull test in the crop gave first-order denitrification rate (0.23 day–1). Reactive transport modeling...

1. A review is presented of the literature on riparian vegetated buffCT strips (VBS) for use in stream-water-quality restoration and limitations associated with their use are discussed. The results are also presented of recent investigations on the effectiveness of a forested and a grass vegetated buffer strip for reducing shallow subsurface inputs of nutrients from agriculture to a stream in c...

Phytoplankton can indirectly indicate health status of coral reefs due to their sensitivity to changes in water quality parameters. This study explored the spatial and temporal variability in water quality and nutrients in relation to phytoplankton community composition and chlorophyll a concentration at Bawe, Mnemba, Chumbe and Pongwe coral reef sites in Unguja Island. In situ measurements of ...

the zarivar lake a freshwater lake in west of kurdistan province is home for large number of native plant and animal species therefore water quality and health of the lake are vital for conservation of these species. the present study aimed at evaluation of the zarivar lake using nsf- wqi as an indicator of water quality. wqi is a suitable tool to examine and classify spatial and temporal varia...

nitrate, arsenic, and selenium concentrations in the pecos valley aquifer of west texas were compiled, mapped, and analyzed in the context of local geology and land use. alluvial deposits of sand, silt, clay, and gravel compose the unconfined aquifer. ranching and farming are predominant land uses in the rural study area. data were tabulated from 79 water wells with a median depth of 75 m and m...

The seasonal melting of ice entombed cryoconite holes on McMurdo Dry Valley glaciers provides oases for life in the harsh environmental conditions of the polar desert where surface air temperatures only occasionally exceed 0°C during the Austral summer. Here we follow temporal changes in cryoconite hole biogeochemistry on Canada Glacier from fully frozen conditions through the initial stages of...