摘要
泸沽湖湖体不同位置和主要入湖河流的水质指标、阴阳离子和氢氧同位组成测试结果表明:不管是干季还是湿季,所有水质参数均符合地表水Ⅰ类水质标准,部分水质参数有轻微波动。泸沽湖水体干湿两季不同采样点的阳离子Na+、Mg2+、Si4+、Mn2+、Ca2+、Sr2+、V5+的浓度变化较小,而Al3+、P5+、K+、Fe3+、Cu2+、Ba2+、As5+、Pb2+的浓度变化较明显;阴离子F-、Cl-、SO42-的浓度变化不明显,而HCO3-和NO3-的浓度变化较明显。泸沽湖出湖河流的排泄能力较弱,蒸发作用在其水文循环中起着较为关键的作用。泸沽湖水主要为大气降水补给,并经历明显的同位素蒸发分馏作用,其入湖河流也均以大气降水补给为主。大气降水、入湖河流输入、水温变化等因素影响湖体水质参数变化。
The testing results of water quality indicators,cations,anions,and hydrogen-oxygen isotopic composition at different locations in Lugu Lake and its main inflow rivers show that:during both the dry and wet seasons,all water quality parameters meet the Class I surface water quality standards,with minor fluctuations observed in some parameters.Among the cations at different sampling points in Lake Lugu across the two seasons,the concentrations of Na+,Mg 2+,Si 4+,Mn 2+,Ca 2+,Sr 2+,and V 5+exhibited minor variations,while the concentrations of Al 3+,P 5+,K+,Fe 3+,Cu 2+,Ba 2+,As 5+,and Pb 2+showed more significant changes.For the anions,the concentrations of F-,Cl-,and SO 42-demonstrated minor variations,whereas the concentrations of HCO 3-and NO 3-exhibited more noticeable changes.The discharge capacity of the outflow river from Lugu Lake is relatively weak,and evaporation plays a critical role in its hydrological cycle.The water in Lugu Lake is primarily recharged by atmospheric precipitation and undergoes significant isotopic evaporative fractionation.The inflow rivers are also mainly recharged by atmospheric precipitation.Factors such as atmospheric precipitation,inflow river inputs,and water temperature variations influence the changes in water quality parameters of the lake.
作者
肖志才
李阳辉
沙龙林
谢天笛
李丹
XIAO Zhicai;LI Yanghui;SHA Longlin;XIE Tiandi;LI Dan(Lijiang Normal University,Lijiang 674199,Yunnan,China;Ecological Environment Monitoring Station of Ninglang County,Lijiang 674300,Yunnan,China)
出处
《云南地理环境研究》
2025年第6期30-37,共8页
Yunnan Geographic Environment Research
基金
丽江市科技计划项目“泸沽湖氢氧同位素特征和水文循环及其水质效应”(2023LJSNK17)。
关键词
泸沽湖
干湿两季
水质变化
水文因素
Lugu Lake
dry and wet seasons
water quality variation
hydrological factors
