Assertion: gully erosion | /r/HasProperty | intensified by stream channelization
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text: While gully erosion is intensified by stream channelization, loss of vegetation cover, overgrazing, cultivation, and other types of human disturbances, recent geological studies have shown that episodes of gully cutting and filling have occurred repeatedly during the last 25,000 years, significantly rearranging some of the thick accumulations of loess.