The results indicated that the water quality in main river was better than tributaries,downstream was better than upstream and suburbh an river was better than urban river.

　
英 美
  • 結果表明主干流的水質(zhì)逐漸得到改善,但不同河段的水質(zhì)變化較大。主干流水質(zhì)好于支流、下游水質(zhì)好于上游、遠離城市河段好于市區河段。
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