Report of the Committee on Sedimentation 1939-1940 Presented at the Annual Meeting of the Division of Geology and Geography (1940) / Chapter Skim
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E. Sedimentation Studies by the Soil Conservation Service
E. Sedimentation Studies by the Soil Conservation Service
Pages 89-96
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From page 89... ...
Since the inaugurat~o:n of Flood Control Surveys, Wllich required much tlie same type of quantitative survey data, the Sedimentation Divisidn has ttmsterred most of its engineering survey work to the flood control survey organization.
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From page 90... ...
The aggregate investment made or obligated for this purpose in the last decade, mainly by the Fe dorm Gove~ont, is not less than half a billion dollars. As the true value of these dewed cements must be measured not by the original cost but in terms of the ultimate worth of' the, dam sites thus utilized, it is apparent that ~ reasonably accurate prediction of the manner and ret o of storage depletion by sedunontat~on in those reservoirs is ~ matter of Cited concern.
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From page 91... ...
to the degree of Similarity of water.shed characteristics, and (2) to [actors affecting measurement of total sediment load in the existing reservoir ma to the depositiona1 charac-terist' cs the serge load would assuage in ~ proposed reservoir.
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From page 92... ...
This bulletin sun~a~izes the results of detailed studies in ~ small part of the Tal~ahatchie River drainage basin, north-c<3ntral Missy ssinpi, and presents 45 '"principles" based on these and other less intensive studies in various areas of excessive diluvial sed~entat~on. The ~SSi$S1ppi investigations revealed tat the greatest part of the sediment delivered to the valley system from accelerated upland sol 1 ero sion has apparently been accumulated In the upper parts of the minor valleys, generally within ten miles or so of the point of origin, and that sand derived arose griller erosion has apparently caused more valley damage than the larger quantities of silt derided chiefly from upland sheet erosion.
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From page 93... ...
Textural analyses have been made of the sediment and graphs have been prepared showing the movement of total sediment load by particle sizes. IsoLyetal maps shower hourly precipitation on the 64.4-sq.uar`3-mi1e watershed have been prepared from records of 13 recording rain gaffes within or immediately adjacent to the watershed.
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From page 94... ...
From its inception, this pro ject has been engaged in studying various phases of the problems of erosion and sedin~tation with the ot jocti~ of prodding base c intonation and principles that would be of assistance ~n the ultimate solution of p~ac~cicai problems confronting the Soil Conservation Service. In general, each individual study deals with some aspect of the mechanics of sediment movement and fluid flow aired has for its objective the determination of a relationship or law that Fill eclair the causes of some phenomenon of erosion or sedimentation and thus point the way to the application of this information to soil conservation practices.
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From page 95... ...
F Selected Annotated Bibliography on Sedimentation as Related to Soil Conservation and Flood Control.
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From page 96... ...
Gordon. ~ Method cE Comparing Hoavy l~neral~s in Sedim - Wary Deposits.
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