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In river science, as in all sciences, there is an accepted way of analyzing problems. This standardized way of collecting and analyzing data allows a cleaner comparison of results between sites or time periods, and better evaluation of the effectiveness of different management activities. Often this involves a preconceived reference frame for types of problems. What is gained in the efficient production of knowledge, however, is potentially lost for the potential of novel observations.

In the case of sediment transport, during the last century, river scientists have shown much less concern for sediment storage than for sediment movement, even though any given sediment particles is likely to spend centuries to millennia in storage on a floodplain or in bars [submerged banks of sediment] and only days to weeks in actual transport. Meade suggests that were geomorphologists to have focused on individual sediment particles` movement beyond just the reach [a short, straight segment of a river] scale, emphasis from the research community would have inevitably focused on sediment storage, and thus on the process that sediment undergoes during storage rather than on the process of mobilizing sediment. Fluvial geomorphology would probably then have been dominated by studies of chemical weathering rather than fluid mechanics. The preference for Eulerian-based studies of sediment fluxes and the processes that determine those fluxes have arguably biased the research agenda of geomorphologists for several decades.

The author of the passage would most likely agree with which of the following statements about river scientists?

AThe emphasis they place on particle movements within the reach scale has led to a misuse of Eulerian-based studies.
BTheir preference for studies of fluid mechanics has given them an inaccurate understanding of the processes sediment undergoes during storage.
CTheir use of multiple preconceived reference frames has led to a distorted view of sediment transport
DThe novel observations about sediment storage they have forgone are offset by their insights into chemical weathering.
EThe attention they have paid to sediment movement is disproportionate to the amount of time sediment is in motion.

E显示答案

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