[Correlationships between the coverage of vegetation and the quality of groundwater in the lower reaches of the Tarim River].
The variations vegetation coverage is the result of conjunct effects of inner and outer energy of the earth, however, the human activity always makes the coverage of vegetation change a lot. Based on the monitoring data of chemistry of groundwater and the coverage of vegetation from 2002 to 2007 in the lower reaches of Tarim River, relations between vegetation coverage and groundwater chemistry were studied. It is found that vegetation coverage at Sector A was more than 80%, and decreased from sector to sector, the coverage of Sector I was less than 10%. At the same sector, samples near to water source owned high coverage index, and samples far away from the river had low coverage index. The variations of pH in groundwater expressed similar regulation to vegetation coverage, that is, Sectors near the water source had higher pH index comparing than those far away. Regression between groundwater quality and vegetation coverage disclosed that the coverage of Populus euphratica climbed up along with increase of pH in groundwater, change of Tamarix ramosissima coverage expressed an opposite trend to the Populus euphratica with the same environmental factors. This phenomenon can interpret spatial distribution of Populus euphratica and Tamarix ramosissima in lower reaches of the Tarim River.
Chen
Yong-jin
YJ
School of Environment and Planning, Liaocheng University, Liaocheng 252059, China. yongjinchen2004@yahoo.com.cn
Chen
Ya-ning
YN
Liu
Jia-zhen
JZ
D003889:Desert Climate; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D032107:Populus / Q000254:growth & development; D045483:Rivers; D012492:Salts / Q000032:analysis; D012987:Soil / Q000032:analysis*; D032363:Tamaricaceae / Q000254:growth & development; D014197:Trees / Q000254:growth & development*; D014867:Water / Q000032:analysis*
D012492:Salts; D012987:Soil; D014867:Water