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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。
The desert-oasis transitional zone belongs to the typical eco-environment fragile zone in arid areas. The growth and distribution of vegetation in this ecotone are restricted by the groundwater environmental conditions (groundwater depth and water quality) and show the important ecological regulation of groundwater. Through the observation data of observation wells in the transitional zone, the results show that the trend of annual groundwater depth changes is closely related to the change of surface runoff. The highest buried depth generally occurs from January to March, and the lowest buried depth generally occurs from July to September. The maximum amplitude ranged from 0.23 to 2.25m. The dominant cation in the groundwater was (Na ++ K +), followed by Mg2 +, Ca2 + was the smallest and the anions were C l-, SO42- and HCO3- , CO32- in which the proportion of the smallest, almost zero; salinity less than 5g / L, vegetation growth will not be inhibited, vegetation growth and distribution mainly depends on groundwater depth.