摘要
为探究富营养化浅水湖泊季节性冰盖污染物分布规律,于2013-2014年冰封期,钻取乌梁素海湖泊冰盖冰芯试样,观测冰厚并对冰芯晶体结构、气泡含量、污染物浓度(总氮、总磷和COD_(Cr))进行分析.结果表明:冰盖可分为4层,中间2层冰晶体粒径较大且气泡含量较少,为冰盖热力生长区.冰盖以柱状晶体居多,粒径随深度增加而增加,气泡含量随冰盖密度增加而减少.冰盖结构特征与污染物分布具有相关关系,冰芯密度及气泡分布与总氮、总磷和COD_(Cr)相关关系分别为0.8965、0.8718、0.8184,并建立多元回归模型揭示冰封期湖泊水质特征,为季节性湖泊冰盖研究及冰封期湖泊水资源规划和管理提供理论依据.
Investigation and analysis of ice core on Lake Ulansuhai from ice season of 2013 to 2014,observational parameter included ice thickness,examination of ice crystal type and bubble structure contributing to the ice cover,measurements of total nitrogen（ TN）,total phosphorus（ TP） and chemical oxygen demand（ COD（Cr））. The preliminary analyses were as follows： the ice cores were divided into four layers. The two middle layers were the mainly thermal ice growth areas. The ice cover was consisted of columnar-crystal ice for the most part,and the crystal size increased with the ice-cover depth and the gas content decreased with the increase of density. The content of contaminates（ TN,TP,COD（Cr））were significantly correlated with density and gas content（rTN= 0. 8965,rTP= 0. 8718 and rCOD（Cr）= 0. 8184）,and we respectively established the multiple regression equation to reveal the lake water quality characteristics in frozen period. It provides theory basis for seasonal ice-cover study and water resources planning and management in ice season.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2016年第2期455-462,共8页
Journal of Lake Sciences
基金
国家自然科学基金重点项目(51339002)和国家自然科学基金项目(51269017
51169017)联合资助
关键词
污染物分布
冰封期
冰盖结构
冰体杂质
乌梁素海
Nutrient distributions
ice season
ice crystal structure
ice impurities
Lake Ulansuhai
