滇池现代沉积物氨氮及磁化率研究.PDF

30 5 ( ) V ol 30 N o5 2005 10 Journal ofK unm ing U n iversity of Sc ience and T echnology ( Sc ience and T echnology) Oct 2005 骆少勇, 刘星, 亓春英 ( , 650093) : 现代沉积物是湖泊营养盐和污染物的重要储藏库, 在 一定条件下, 这些内源污染负 可能 成为水体富营养化的主导因子 研究通过对滇池( 外海) 现代沉积物中的氨氮磁化率指标进行 测试分析, 研究结果表明: 滇池现代沉积物中氨氮的高值区主要分布在北部海埂附近, 中部略有 增高, 南部则最低, 表层沉积物的氨氮含量低于下层; 滇池现代沉积物的磁化率大小由滨岸带向 湖心依次递减, 在垂向上, 磁化率随着深度的增加而增大 研究结果可为滇池污染治理提供了 依据 : 湖泊沉积物; 氨氮; 滇池; 磁性矿物 : P512 : A : 1007 - 855X ( 2005) 05 - 0001- 05 Study on the D istribution Features ofAmmoniac N itrogen andM agnetic Susceptibility inM odern Sedim ent of DianchiLake LUO Sha o-yong, L IU X ing, Q I Chun-y ing ( F acu lty of Land R esource Eng ineering, Kunm ing U n iversity o f Sc ience and T echnology, K unm ing 650093, China) Abstract: The m odern sedmi en t is an mi portant storehou se o f the nutrient salt and pollutant in Lakes U nder proper condition s, these interna l contam ination load sources can cau se the eutroph icat ion o f lakes B ased on the study on the distribution features of the amm on iac nitrogen and m agnet ic su sceptibility in m odern sedmi en t of D -i anchi Lake, it is conclu ded that the h igh va lu e area of amm on iac and n itrogen distribu tes in the northern p art nearly H a igeng district, the va lu e of ammoniac and n itrogen increases slightly from the northern p art to the m id- dle part and the m ost low er va lu e is near the southern part T he amm oniac n itrogen of the surface sed mi ent is low er than the below layers; and the m agnet ic su sceptibility o f m odern sedmi ent decreases gradu ally from the edge to the m iddle o f the D ianchi lake, increases along w ith the d