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According to James Syvitski, an oceanographer and professor at the University of Colorado, Boulder, a delta's elevation above sea level depends on four interrelated factors: the ocean's global volume, aggradation, sediment compaction, and vertical movements resulting from plate tectonics and other geophysical processes.
369-385 India: Aggradation and degradation in response to monsoonal strength (Review) 18 Aerosol characteristics at a Journal of Geophysical 85 high-altitude location in Research D: central Himalayas: Optical Atmospheres, 2006, 111 properties and radiative (17), forcing (Article) art.
Impacts of large dams on downstream flow conditions of rivers: aggradation and reduction of the Medjerda channel capacity downstream of the Sidi Salem dam (Tunisia).
CPI > 1 also indicates aggradation in soil quality as related to soil organic matter content and to all benefits of this component for soil improvement.
One-, two-, and three-dimensional models for either steady flow [25-29] or unsteady flow [30-32] have been used widely to investigate channel degradation or aggradation during flood events.
Environmentally, however, the effects of regulation include the disruption of flows and sedimentation downstream due to the construction of dams, long term siltation and consequent aggradation upstream of dams, bank erosion in the first few years after regulation, and some indefinite sedimentary redistribution, salinity, reversal of peak flows (naturally peak flows are in winter; when regulated peak flows occur in summer), and the potential for temperature fluctuations and the transfer of biota due to inter-divisional transfers (Walker, 1985, p.112).
At a reach scale, floodplain aggradation is controlled by flood discharge and valley width [83, 84].
Classifying the forest area into six levels of above-ground standing biomass carbon density (tons/ha) shows this aggradation of carbon in greater detail (Fig.
However, they undergo low-energy flood events during the mid- to late wet season (February to April) and aggradation associated with these annual events has a potential to bury low-density archaeological deposits.
Using established Cs-I37 chronostratigraphic markers at 1954 and 1963, calculated sedimentation rates yield an average aggradation of 0.78 cm/yr over 58 years and 0.61 cm/yr over 49 years.
In the reach directly below the dam there was an increase in fine sediment that accounted for an average cross-sectional channel aggradation of 26 cm, from pre- to post-dam conditions, indicating reservoir erosion and subsequent downstream deposition Nutrient limiting conditions also changed from pre-and post dam removal.
One consequence is that many rivers can no longer maintain rich in-stream faunal habitats or flush their sediments and the waters of their estuaries out to sea naturally, a situation that contributes to coastal erosion, river aggradation and flooding, and poor coastal water quality.
According to Epstein, "in bringing agents to bear on this controversy, we have the benefits of (a) a very accurate reconstruction of the physical environment (hydrology, aggradation, maize potential, and drought severity) on a square hectare basis for each year of the study period, and (b) an excellent reconstruction of household numbers and locations." Due to a collaboration with anthropologists, plausible rules of agent behavior were identified (see Dean et al.
Degradation changes of the coal quality in the seams of the region were found in about 30 % of the faults of the Upper Silesian Coal Basin, while the aggradation ones in about 12 % (Cmiel, 2009; Cmiel and Dziurowicz, 2011).
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