While soil erosion in the upper and middle reaches of the slopes has resulted in extensive gullies, sedimentation in the lower reaches has created extensive sandfans and buried some of the fertile, clayey soils.
Catchments in the eastern part of the island, in particular, were subject to extensive valley floor sedimentation from 1999 onwards and sediment was transported as far as the ocean23 (Supplementary Videos 2, 8 and 9).
For both methods, the filled hydrogel beads were relatively stable to aggregation/dissociation from pH 1 to 6, but underwent extensive aggregation and sedimentation at higher pH values.
Extensive sieving and sedimentation are required to achieve a narrow size distribution and to remove fine particles which make this method time consuming and labor intensive.
Consequently, water resources in the Middle Chattahoochee Watershed of western Georgia are threatened by increased sedimentation from extensive urban development as well as from other land covers such as livestock grazing and silviculture.
Increasing frequency of severe floods on the middle and lower Changjiang (Yangtze) River during the past few decades can be attributed to both abnormal monsoon rainfall and landscape changes that include extensive deforestation affecting river sedimentation, and shrinking lakes and levee construction that reduced the areas available for floodwater storage.
Evidence from coastal bluffs and the interior of the study area indicates extensive colluvial, fluvial, and aeolian sedimentation beginning around 31 ka and continuing into the Holocene.
In addition, all 3 children had extensive work-ups including normal hemoglobin, sedimentation rate, C-reactive protein, stool studies, endoscopy and histology, suggesting bacterial infection, parasite infestation, intestinal inflammation and celiac disease were unlikely causes.
Since its formation, the area that comprises the park has experienced at least four major periods of extensive volcanism, three or four periods of major sedimentation, and several intervals of major tectonic deformation where the crust has been reshaped.
The flow of organic matter from the surface water layers to the sea floor, owing to the sedimentation processes, had to be more extensive than in the opposite direction.
