【摘要】 荒漠-绿洲过渡带属于典型的干旱区生态环境脆弱带,在这交错带上植被的生长与分布受地下水环境状况(地下水埋深、水质)制约,显示出地下水重要的生态调控作用。通过对过渡带的观测井数据资料进行分析,结果表明:地下水埋深的年内变化趋势与地表径流变化联系紧密,埋深最高一般发生在1~3月,埋深最低一般发生7~9月,最大变幅在0.23~2.25m之间;地下水中对矿化度起主要作用的阳离子是(Na++K+),Mg2+次之,Ca2+最小,阴离子是C l-、SO42-,HCO3-次之,CO32-在其中的比重最小,几乎为零;矿化度小于5g/L,植被生长不会受到抑制,植被生长与分布主要取决地下水埋深。更多还原

【Abstract】 Desert-Oasis transitional zone is a typically fragile ecological environment region in arid area.In this zone,the vegetation growth and distribution are controlled by the state of groundwater environment(groundwater depth and quality),showing that the groundwater plays an important control role in the ecological environment.Based on observation wells profile data analysis of the transitional zone,it was showed that the change trend of the groundwater depth is similar to surface runoff in a year.Generally,the maximum value of groundwater depth comes up from January to March,the minimum value of groundwater depth occurres from July to September,and the changing range is from 0.23 to 2.25m;in groundwater mineralization,the primary role of the cation is(Na++K+),Mg2+ and Ca2+,the main role of the anion is Cl-,SO2-4,and HCO-3.CO2-3 is zero;Groundwater mineralization is less than 5g/L,will not restrain the growth of vegetation.The growth and distribution of vegetation lie on groundwater level.更多还原