【摘要】 通过对建立在河源市高埔小河支流入东江口的前置库系统进行研究,结果表明:前置库系统对入江河流中COD、NH⁺₄-N、TN、TP、SS（雨天）的去除作用明显,平均去除率分别为42.4%、28.0%、29.9%、22.8%、62.9%。前置库系统不同功能区对各污染指标有不同的去除效果。砾石河床对COD、NH⁺₄-N、SS的去除效果较显著,前置库净化区对TN、TP有较好的净化效果。不同水文期,前置库系统的净化效果不同。COD在枯水期净化效果最好,丰水期次之;而NH⁺₄-N、TN、TP的净化效果则均是平水期>丰水期>枯水期。该前置库系统能有效削减入江污染负荷,其中SS的年削减量最大,为406.94 t/a。更多还原

【Abstract】 We studied a pre-dam system built on the tributary where Gaopu River flows into the Dongjiang River in Heyuan. The results showed that its removal effects of COD, NH⁺₄-N, TN, TP and SS（rainy day） were significant, with the average removal rates of 42.4%, 28.0%, 29.9%, 22.8% and 62.9%, respectively. Different functional areas of the pre-dam system had different removal effects on various pollutant indexes. Gravel bed had a significant removal effect on COD, NH⁺₄-N and SS, while the purification area of the pre-dam had better purification effect on TN and TP. In different hydrological periods, the purification effect of the pre-dam system was different. The purification effect of COD was the best in the dry season, followed by the wet season; while NH⁺₄-N, TN, and TP had the best purification effects in the normal season, followed by the wet season and the dry season. The pre-dam system could effectively reduce the pollution loads into the river, and the annual reduction of SS was the largest with the amount of 406.94 tons per year.更多还原