高密度人为活动影响下水体氢氧同位素的变化

Changes of Oxygen and Hydrogen Isotopes in Water under the Influence of High Density Anthropogenic Activities

为了解高密度人为活动影响下水体的氢氧同位素的变化规律,在珍珠湖东西南北四侧进行了3个月采集,共12个样品.分别测试了样品的p H、TDS及氢氧同位素含量等参数,利用图示及统计方法分析其变化过程.结果表明:珍珠湖水体p H值在7.86~8.91之间,呈碱性;TDS在652~720mg/L之间,属于淡水.珍珠湖水体受大气降水影响较为明显,珍珠湖水样品落在全球大气降水线以下,其受蒸发作用影响明显,珍珠湖水中δD和δ18O相对较低,δD变化范围介于-32.69‰^-25.22‰之间,平均-29.93‰.δ18O变化范围介于-3.05‰^-1.64‰之间,平均-3.05‰.珍珠湖水体表现δD、δ18O漂移,δD和δ18O大致与TDS呈正相关变化的趋势.

In order to understand the changes of hydrogen and oxygen isotopes of water under the influence of high density artificial activities,the author collected 12 samples on the four sides of the four corners sides of Pearl Lake.The parameters such as pH,TDS and hydrogen and oxygen isotopes content were tested,and the change process was analyzed by means of graphs and statistical methods.The results showed that the pH value of Pearl Lake was between 7.86 and 8.91,and the TDS was between 652 and 720 mg/L,which belonged to fresh water.The Pearl Lake water body is affected by the atmospheric precipitation,the Pearl Lake water sample falls below the global atmospheric water line,and it is obviously affected by evaporation.The content ofδD andδ18 O in pearl lake is relatively low,and the range ofδD is between-32.69‰and-25.22‰,with an average of-29.93‰.δ18 O varies between-3.05‰and-1.64‰,with an average of-3.05‰.Pearl River water showedδD,δ18 O drift,δD andδ18 O content was positively correlated with TDS content.