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分别对巢湖流域水田和旱田降雨径流和雨水淋溶污染情况进行了测定,测定结果表明:水田径流中氨氮、硝态氮、溶解磷和COD浓度明显高于旱田径流中相应污染物浓度值,水田径流中总磷浓度在部分测定时间相差不大,其余测点值均高于旱田径流中总磷浓度值。水田淋溶液中氨氮和硝态氮浓度同旱田淋溶液中相差不大,多数情况下水田淋溶液中溶解磷和总磷浓度同旱田淋溶液中相差不大;淋溶液中氨氮、硝态氮、溶解磷、总磷浓度均显著高于径流中;水田淋溶液中COD值略低于水田径流中COD值;旱田淋溶液中COD浓度均值与旱田径流中COD浓度均值相差不大。
The results showed that the concentrations of ammonia nitrogen, nitrate nitrogen, dissolved phosphorus and COD in runoff of paddy field were significantly higher than those of dry land runoff. The paddy field The total phosphorus concentration in runoff did not differ much in the partial measurement time, and the remaining measured values were higher than the total phosphorus concentration in dry runoff. The concentration of ammonia nitrogen and nitrate nitrogen in paddy field leaching solution was not different from that in dryland leaching solution. In most cases, the concentration of dissolved phosphorus and total phosphorus in paddy field leaching solution was not different from that in dryland leaching solution. The contents of ammonia nitrogen, nitrate nitrogen, Dissolved phosphorus and total phosphorus were significantly higher than those in runoff. The COD value of leaching solution in paddy field was slightly lower than that of runoff in paddy field. The average of COD concentration in leaching solution of dry land was not significantly different from that of dry land runoff.