Results 191 to 200 of about 355,239 (403)

Aquifer Arsenic Cycling Induced by Seasonal Hydrologic Changes within the Yangtze River Basin.

open access: yesEnvironmental Science and Technology, 2016
Michael V. Schaefer   +5 more
semanticscholar   +1 more source

Using synthetic farm data to estimate individual nitrate leaching levels

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract This article delineates a synthetic population generation scheme in an attempt to estimate individual nitrate leaching rates among Greek farms in the region of Thessaly. The proposed scheme relies upon the construction of a Bayesian network describing farming activities in the region, which, coupled with the use of nonparametric regression ...
Konstantinos Mattas   +2 more
wiley   +1 more source

Investigating relationships among strontium, barium, and seasonality in wild baboons

open access: yesArchaeometry, EarlyView.
Abstract Geochemical profiles of Australopithecus africanus and baboon teeth show fluctuating trace elements, possibly reflecting seasonal diets. Here we use laser ablation–inductively coupled plasma–mass spectrometric measurements of calcium‐normalized strontium and barium ratios (Sr/Ca and Ba/Ca) and ion microprobe analyses of oxygen isotopes (δ18O ...
Maya Bharatiya   +12 more
wiley   +1 more source

The impact of the structural framework of the North German Basin on Pleistocene tunnel‐valley formation

open access: yesBoreas, EarlyView.
This study contains a comprehensive regional analysis of the orientations of tunnel valleys, faults and salt structures in the North German Basin, aiming to identify correlations that might indicate a structural control on tunnel‐valley formation. A structural control on tunnel‐valley formation has been repeatedly postulated and correlations have been ...
Jörg Lang   +5 more
wiley   +1 more source

Economic Efficiency of Short-Term Versus Long-Term Water Rights Buyouts [PDF]

open access: yes
Because of the decline of the Ogallala Aquifer, water districts, regional water managers, and state water officers are becoming increasingly interested in conservation policies.
Golden, Bill B.   +3 more
core   +1 more source

Subtle relict channels associated with large dolines in an area formerly beneath the Laurentide Ice Sheet, northern Ohio, USA

open access: yesBoreas, EarlyView.
Low‐relief dry channels appear out of place across a glaciated karst landscape in northern Ohio. Channels are only a few metres deep cut into limestone and draped with a veneer of till. Several hypotheses are proposed for explaining the channels. Low‐relief dry channels are observed across the Bellevue‐Castalia Karst Plain of north‐central Ohio, USA ...
Timothy G. Fisher   +6 more
wiley   +1 more source

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