Consideration of density current hydraulic condition at a river-mouth.

An extensive reef system at the Amazon River mouth

Large rivers create major gaps in reef distribution along tropical shelves. The Amazon River represents 20% of the global riverine discharge to the ocean, generating up to a 1.3 × 10(6)-km(2) plume, and extensive muddy bottoms in the equatorial margin of South America. As a result, a wide area of the tropical North Atlantic is heavily affected in terms of salinity, pH, light penetration, and se...

Interactions of Waves and River Plume and their Effects on Sediment Transport at River Mouth

Assessment of hydraulic fish habitat condition using integrated toolkit: a case study of the Geum river basin, Republic of Korea.

Artificial changes of rivers, including construction and operation of dams, inevitably lead to physical and ecological changes throughout waterways and their floodplains. In this study, a conceptual model coupled with integrated numerical modeling is presented for hydraulic fish habitat assessment of the Geum River basin, Republic of Korea. Based on the major events which might have affected th...

Diurnal Distribution of Phytoplankton From a Single Station at the Mouth of the James River

Eight sets of water samples were taken to a depth of 36 ft during a 24 hr period. A homogeneity was found in the vertical distribution of the total phytoplankton in samples from 7 of the 8 hydrocasts. Skeletonema costatum and Asterionclln japonica were the most numerous phytoplankters in every sample, with the majority of their counts each exceeding 500,000 cells per liter. A twenty-four-hour s...

Analysis of Flood Hydraulic in Alluvial Fan River using CCHE2D Case Study: (Roodan River)

In this study the advantages and importance of a numerical model to predict and monitor the processes governing hydraulic changes alluvial fan river is discussed. For this reason and because of the importance of flow velocity and shear stresses resulting from the erosion of the river, A two-dimensional numerical model to simulate the CCHE2D river changes ranging from Roodan River is used. In th...