夏季玉龙雪山及丽江盆地水体主要无机离子特征  

Characteristics of Different Water Bodies in Summer over Yulong Snow Mountain Area

作　　者：朱国锋[1,2] 何元庆[1,3] 蒲焘[3] 王淑新[1,2] 辛惠娟[1,2] 王春凤[3] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室,兰州730000 [2]中国科学院研究生院,北京100049 [3]兰州大学西部环境与气候变化研究院,兰州730000

出　　处：《地理科学进展》2011年第7期868-874,共7页Progress in Geography

基　　金：中国科学院"西部之光"人才培养计划"西部博士资助项目"(O828A11001);国家自然科学基金项目(90511007;40801028;40971019)";国家重点基础研究发展(973)计划(2007CB411501);中国科学院研究生科技创新与社会实践资助专项;冰冻圈科学国家重点实验室自主项目;国家自然科学基础人才培养基金冰川学冻土学特殊学科点(J0630966)

摘　　要：为探究玉龙雪山地区地-气-水-人之间的相互作用机理,于2005年7月22-28日在云南省丽江市玉龙雪山地区采集不同水体样品,在探讨不同水体水文联系的基础上,对该区域不同水体的无机离子浓度和特征进行了分析。结果表明玉龙雪山地区不同水体无机离子浓度存在较为明显的差距,无机离子浓度较大的是低海拔地区的湖水和地下水,浓度较小的是冰舌融水和融水径流;水体主要无机离子是HCO3-,Ca2＋,Mg2＋,SO42-,Na＋,K＋,Cl-,其中Ca2＋占整个阳离子的53.27%,是最大优势阳离子,阴离子中HCO3-是优势阴离子,占阴离子总量的70.35%左右,优势离子与非优势离子之间浓度差距较大。海拔4270 m以上,受局地岩石岩性的影响无机离子浓度较高;海拔42703180 m,由于新鲜融水未充分溶解基岩的离子和水体本身的沉积作用,离子浓度较低;海拔30462400 m,水岩作用导致水体HCO3-,Mg2＋,Ca2＋,K＋,Na＋浓度较高,季风输送和近源人类活动导致NO3-、SO42-,K＋浓度也较高;相关性分析表明阳离子的来源、存在方式和反应机理的相似性比阴离子强;SO42-对区域水岩反应有较强的加速作用;Mg2＋和Ca2＋同源。Different water samples were collected in the Yulong Snow Mountain in Lijiang city,Yunnan Prov-ince on July 22-28,2005.On the basis of description of the internal relations of different water bodies,character-istics of inorganic ions were analyzed to study the interaction mechanism of human-geosphere-atmosphere-hy-drosphere in the study area.The results showed that there were obvious differences of inorganic ions in these water samples.Lake water and groundwater at low altitudes have larger concentration of inorganic ions and the glacier tongue melting water and melt water runoff at high altitudes have lower concentration.The major inor-ganic ions are HCO3-,Ca2＋,Mg2＋,SO42-,Na＋,K＋ and Cl-.As the first advantageous cations,Ca2＋ occupied 53.27% of all the cations.In addition,HCO3-is the first advantageous anion,accounting for 70.35% of the total anions.The aggregate shortage is displayed by the low proportion of the aggregate of the other ions.The concentration of inorganic ions at an altitude higher than 4270 m showed high level under the influence of regional lithology.Due to sedimentation of melt water and non-fully dissolution of the ions from local lithology,low level was ob-served at an altitude of 4270-3180 m.At 3046-2400 m,HCO3-,Mg2＋,Ca2＋,K＋ and Na＋ showed high level under the influence of dissolve solids.NO3-,SO42-and K＋ showed high level due to moisture transport and human activi-ties.Compared with cations,there is more comparability in source,existence and reaction mechanism of anions.SO42-,K＋,Na＋,Mg2＋ and Ca2＋ in water mainly come from soil.Meanwhile,SO42-has a favorable enhanced effect on water-rock interaction.Moreover,Mg2＋ and Ca2＋ in water have the same source.

关 键 词：玉龙雪山地区 无机离子 相关性分析 优势离子 离子来源 

分 类 号：P342[天文地球—水文科学]