| 31. | From about 1877 the silting of the channels started to improve and trade improved again.
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| 32. | But the silting and the lack of oxygen has greatly reduced the number of trout.
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| 33. | The port silting theory has been considered but no real evidence is established at present.
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| 34. | Over the course of time, these became bogs through the natural silting up process.
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| 35. | The lake itself is increasingly silting up.
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| 36. | But heavy silting has made it hard for ocean liners to use Haiphong's harbor.
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| 37. | Seleucia Pieria, which was already fighting a losing battle against continual silting, never recovered.
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| 38. | During the early 1800s as trade was increasing, so the river was simultaneously silting up.
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| 39. | By 1908 problems with river silting and bar strandings meant that coastal shipping was avoiding Foxton.
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| 40. | Subject to silting up, it was dredged several times for the Canal's use.
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