Erosion coincidence

Different causes can coincide in time and strengthen their effect on the rivers. For example, in the 16th-19th centuries, the human-induced erosion caused by deforestation and land ploughing coincided with the little Ice Age. Under these circumstances, the sediment load of rivers noticeably increased. 

Recurrent uplift and erosion of Permian strata coincident with the area of the Bannock highland also took place prior to Triassic deposition (3, 22) as indicated by the absence of Retort (fig. 4B) and younger Permian rocks in parts of eastern Idaho and some adjacent areas. 

Suspended-sediment concentrations increased sharply on rises and reached a maximum at or, commonly, shortly before peak discharge (Figures 6 and 7). Peak sediment concentrations consistently occurred at times of minima in silica concentration. This is to be expected if minimum silica and maximum sediment concentrations coincide with maximum contribution of overland runoff to stream flow, for at that time maximum dilution of silica-rich subsurface flow by direct runoff would occur and maximum erosive capability of direct runoff would exist. If this reasoning is correct, peak stream discharge would coincide with peak contribution from overland flow only when rainfall was intense or the surface soil was of very low permeability. Normally, peak direct runoff would precede peak stream discharge because of the significant contribution of subsurface flow at maximum stream discharge. 

The ability of acidic excipients to induce surface erosion is further demonstrated in Figs. 10 12 [32], Figure 10 shows the concomitant release of the incorporated marker, methylene blue, release of the anhydride excipient hydrolysis product succinic acid, and total weight loss of the device. It is dear that release of both materials coincides with weight loss of the device, as expected for a surface erosion process. 

The thermal and burial histories of the basin for a variant that is free from erosion in the Permian were simulated for comparison with the main model (Fig. 6.7). This variant was controlled by present-day temperatures and vitrinite reflectance (similar to Fig. 6.6) and, by coincidence of the tectonic curve, calculated by removing the sediment and water load, resulting from variation in the thermal state of the basement (as... 

An 80-year-old man was referred to dermatology clinic with flexural psoriasis on physical examination painful conjunctival erosions were found [14 ]. The lesions had been present for about 18 months, and the date of start was coincident with a doubling of daily dose of nicorandil. The patient was switched to isosorbide mononitrate, and in about 3 weeks pain disappeared and there was complete healing of the conjuctival erosions. This is the first case report of nicorandil-induced conjuctival erosions, which is completely reversed by drug suspension. 

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