Controlling the Mississippi River
نویسندگان
چکیده
منابع مشابه
The 1973 Flood and Man's Constriction of the Mississippi River.
The progressive constriction of the Mississippi for navigation since 1837 has caused bottom erosion in some stretches. In others the bottom oscillates up and down with time. The high stages rise much more rapidly. Constriction of the river channel causes flooding and makes floods higher; thus navigation works degrade the protection afforded by levees. The combination of navigation works and lev...
متن کاملA Model of Bridge Choice Across the Mississippi River
5 On September 18th 2008, a replacement for the previously collapsed I-35W bridge opened 6 to the public. Consequently, travelers were once again confronted with the opportunity to find 7 better alternatives. The traffic pattern of the Minneapolis road network was likely to read8 just, because of the new link addition. However, questions arise about the possible reasons (or 9 components in the ...
متن کاملDistribution and variability of redox zones controlling spatial variability of arsenic in the Mississippi River Valley alluvial aquifer, southeastern Arkansas.
Twenty one of 118 irrigation water wells in the shallow (25-30 m thick) Mississippi River Valley alluvial aquifer in the Bayou Bartholomew watershed, southeastern Arkansas had arsenic (As) concentrations (<0.5 to 77 microg/L) exceeding 10 microg/L. Sediment and groundwater samples were collected and analyzed from the sites of the highest, median, and lowest concentrations of As in groundwater i...
متن کاملPunctuated sand transport in the lowermost Mississippi River
[1] Measurements of sand flux and water flow in the Mississippi River are presented for a portion of the system 35–50 km upstream from the head of its subaerial delta. These data are used to provide insight into how nonuniform flow conditions, present in the lower reaches of large alluvial rivers, affect the timing and magnitude of sand transport near the river outlet. Field surveys during both...
متن کاملSources of nitrate yields in the Mississippi River Basin.
Riverine nitrate N in the Mississippi River leads to hypoxia in the Gulf of Mexico. Several recent modeling studies estimated major N inputs and suggested source areas that could be targeted for conservation programs. We conducted a similar analysis with more recent and extensive data that demonstrates the importance of hydrology in controlling the percentage of net N inputs (NNI) exported by r...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1913
ISSN: 0036-8733
DOI: 10.1038/scientificamerican01041913-6supp