| 滇池典型湖湾沉积物氮磷化学特性及疏浚层推算 |
| 摘要点击 2134 全文点击 1962 投稿时间：2004-10-02 修订日期：2005-02-04 |
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| 中文关键词 垂向分布 沉积物 马村湾 海东湾 疏浚 |
| 英文关键词 vertical distribution sediments Macun bay Haidong bay dredging |
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| 中文摘要 |
| 以滇池围湖试验区海东湾和马村湾的沉积物为研究对象,对沉积物柱状样按每3cm分层,测试有机质、总磷及赋存形态磷(包括不稳定性磷、铁铝结合态磷、钙结合态磷、残渣磷)、总氮、亚硝酸盐氮、硝酸盐氮和氨氮等指标.结果表明:近些年来,2湾遭受的氮、磷内源负荷比以前大;铁铝结合态磷在磷的各形态中含量最高,氨氮所占总氮的比例较其它湖泊偏低;也发现海东湾和马村湾这2个湖湾在9～12cm层总磷、总氮呈现污染减轻的趋势,同时在24～39cm的深度上,总磷、总氮指标再次出现转折,考虑可行性和经济制约,24～39cm处可作为疏浚层厚度. |
| 英文摘要 |
| The sediments of Haidong bay and Macun bay in Dianchi Lakes' experimental area were studied. The sediment column was cut in every 3cm, and the following items are tested,such as total phosphorus, phosphorus species, which include labile phosphate, Fe,Al-P, Ca-P and residual-P, total nitrogen, nitrate nitrogen, nitrite nitrogen, ammonium nitrogen. The results showed that the loads of nitrogen and phosphorus of these two bays increased quickly in recent years. The Fe,Al-P was the largest component in all the P-forms and the content of ammonium nitrogen in these two bays less than that of other lakes. The layer of 9 to 12 centimeters of the two bays was polluted less than the rests. It indicated that these years more and more wastewater was inflow in these two bays. At the same time, the distribution of each testing items showed another low value between 24 to 39 centimeters. So considering feasibility and economic restriction, we can set the 24～39 centimeters depth as a dredging layer. |
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