新疆铁门关市域地下水氢氧稳定同位素特征分析

Characteristics of hydrogen and oxygen stable isotopes in groundwater of Tiemenguan city, Xinjiang

文中通过采集代表性的地下水样品60组及地表水样品12组,采用对比分析方法,分析了新疆铁门关市地下水稳定同位素特征及氘盈余值,并结合水化学特征,讨论了铁门关市域范围地下水的补给来源。结果表明:区内地下水补给来源主要为大气降水,且经历了较强烈的蒸发作用。北部冲洪积砾质平原区地下水主要受低山区降水及冰雪融水补给,南部细土平原区受人类活动影响较强,浅层地下水主要接受灌溉入渗补给。沿地下水流向,蒸发作用逐渐增强,d值逐渐减小,浅层地下水咸化加剧。文中研究为铁门关市地下水循环演化规律、地下水资源调查以及合理开发利用提供了科学依据,且具有一定区域特色。

In this study,60 representative groundwater samples and 12 representative surface water samples were collected.The stable isotope characteristics and deuterium surplus value of groundwater in Tiemenguan city,Xinjiang were analyzed by comparative analysis method.Combined with hydro chemical characteristics,the recharge sources of groundwater in Tiemenguan city were discussed.The results show that the main source of groundwater recharged in the area is atmospheric precipitation and has experienced strong evaporation.Groundwater in the northern alluvial-proluvial gravel plain area is mainly recharged by precipitation and ice-snow melt water in low mountainous areas.The southern fine soil plain area is strongly affected by human activities,and the shallow groundwater is mainly recharged by irrigation infiltration.Along the groundwater flow direction,the evaporation gradually increases,the d value gradually decreases,and the shallow groundwater salinization is intensified.This study provides a scientific basis for understanding the evolution of groundwater circulation,conducting the groundwater resources investigation,and rational ly develop and utilize the groundwater in Tiemenguan city,and also has certain regional characteristics.