Showing results for: in-situ site investigation Articles
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Profiling OCR in Stiff Clays by CPT and SPT
Standard penetration tests (SPT) and cone penetration tests (CPT) have conventionally been used to index profiles of undrained shear strength su in clay deposits. Since su is related to stress history, an alternative use of penetration resistances is the profiling of in-situ overconsolidation ratio (OCR). An empirical methodology is developed based on compiled data bases from 50 sites ...
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Examining impacts of current‐use pesticides in Southern Ontario using in situ exposures of the amphipod Hyalella azteca
In situ exposures with Hyalella azteca were used to assess impacts of current‐use pesticides in Southern Ontario, Canada. Exposures were conducted over 2 growing seasons within areas of high pesticide use: 1 site on Prudhomme Creek, and 3 sites on Twenty Mile Creek. Three sites on Spencer Creek, an area of low pesticide use, were added in the second season. Surface water samples were collected ...
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Integrative assessment of selenium speciation, biogeochemistry and distribution in a northern coldwater ecosystem
For the past decade, considerable research has been conducted at a series of small lakes receiving treated liquid effluent containing elevated selenium (Se) from the Key Lake uranium milling operation in northern Saskatchewan, Canada. Several studies related to this site, including field collections of water, sediment, and biota (biofilm/periphyton, invertebrates, fish, and birds), ...
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