(b) The percentage of excess surface runoff ( R s ) in the central city increased significantly from 22 to 67%, and showed a trend of expansion from the central city to the suburbs.
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Study on the effect of underlying surface changes on runoff generation in the urbanized watershed.
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The sentences
During this decade, the percentage of R s in the watershed increased rapidly from 24 to 41%, while the other three runoff components showed a decreasing trend.
R s showed a highly significant positive correlation with construction land.