Increasingly, natural resource management agencies and nongovernmental organizations are sharing monitoring data across geographic and jurisdictional boundaries. Doing so improves their abilities to assess local-, regional-, and landscape-level environmental conditions, particularly status and trends, and to improve their ability to make short-and long-term management decisions. Status monitoring assesses the current...
We review how urbanization alters aquatic ecosystems, as well as actions that managers can take to remediate urban waters. Urbanization affects streams by fundamentally altering longitudinal and lateral processes that in turn alter hydrology, habitat, and water chemistry; these effects create physical and chemical stressors that in turn affect the...
Forest engineers must frequently make flood frequency estimates for
very small watersheds when designing culvert installations. Empirical
formulae and simplified rainfall runoff models, the most commonly used
techniques to predict floods from very small watersheds, require considerable
engineering judgement to give reasonable results. As an alternative
to such methods, this...
Forest engineers must frequently make flood frequency estimates for
very small watersheds when designing culvert installations. Empirical
formulae and simplified rainfall runoff models, the most commonly used
techniques to predict floods from very small watersheds, require considerable
engineering judgement to give reasonable results. As an alternative
to such methods, this...
Assessing the risk from exposure to a chemical mixture in the environment can seem prohibitively challenging. Most components of the mixture are not readily identifiable, chemicals may interact to cause other-than-additive toxicity, and the number of potential combinations of environmental contaminants is enormous. These challenges can make it seem impossible...
The global aquaculture industry has seen dramatic growth over the last two decades, and is forecast to become increasingly important into the next century. The aquaculture output, of the African continent, however, remains low at about 4% of the total. There is a perception of failure where donor assisted projects...
Nearly 100 chondrules were extracted from -8.6g of the
Mokoia (CV3) meteorite and have been analyzed by
sequential instrumental neutron activation analysis
(INAA). The resulting data were utilized in a
comprehensive statistical characterization of these
objects and, unlike similar investigations, virtually no
loss of relevant data was incurred due to...
The chemistry of hafnium oxide based and materials are described in the context of ion exchange and lithography. HafSOx, represented by the composition HfO₂₋[subscript x](SO₄)x, is described to possess a significant capacity towards ion exchange in acidic and basic solutions, enabling films of HafSOx to be cleanly and readily be...
Descriptions of the fire regime in the Douglas-fir/western hemlock region of the Pacific Northwest traditionally have emphasized infrequent, predominantly stand-replacement fires and an associated linear pathway of stand development, where all stands proceed along a common pathway until reset by the next fire. Although such a description may apply in...
