The Variations of Meteorological and Hydrological Factors across Different Temporal Scales and Their Influences on Evaporation within Salt Ponds of the Qarhan Salt Lake
At present,studies on evaporation in the Qarhan Salt Lake mainly focus on the influence of meteorological factors on brine evaporation.Whereas,the relationship between brine evaporation and meteorological factors in different time scales is less constrained.In this study,we observed meteorological factors such as temperature,dew point temperature,wind speed,relative humidity,daily solar radiation in the Qarhan Salt Lake,as well as fresh water and brine evaporation rates,water temperature and water depth of salt ponds with different brine densities from November 5,2020 to May 1,2023.We also moni-tored hydrological factors such as flow rate of the replenishing river,Golmud River,in the Qarhan Salt Lake.Correlation analysis,multiple regression modeling techniques are applied to simulate evaporation at hourly,daily,and monthly intervals.The findings indicate a consistent pattern in the variations of water temperature,water level,and freshwater evaporation rates across different salt ponds.The fluctuations in brine evaporation show direct correlation with the densities of the salt ponds.Additionally,the correlation between evaporation and meteorological factors is enhanced with the increase of time scale.The evapora-tion of the Qarhan salt ponds is mainly affected by ambient temperature on hourly and monthly scale,and by solar radiation on daily scale.Under extreme weather condition,it exhibits synchronous variations between the hydrological factors of river and micro-meteorological factors of the salt ponds,while,a subsequent lag effect on evaporation.The results can provide theoretical guidance for the production of salt pans.
Qarhan Salt LakeSalt pondsEvaporationMeteorological factorsHydrological parametersDifferent temporal scale
NETL
NSTL
万方数据
维普
