[Three stages of the groundwater chemical properties reacting on the intermittent water deliveries in lower Tarim River, China].
Based on the monitored data of groundwater chemical properties and groundwater depth influenced by five intermittent water deliveries in the lower reaches of the Tarim River, the regulation of groundwater chemistry varying was analysed, the variations in groundwater chemical properties unfolded a clear three-stages changing character under the influence of water deliveries: the initial stage--concentrations of major ions and total dissolved solids (TDS) increasing; the intermediate stage-the concentrations decreasing; the late stage--the chemical properties increasing once more. The variation of groundwater chemistry resulted from many factors, such as the salinities in soil profile, the quality of transported water, the distance from watercourse, the amount and the season of the delivery. However, "salts coming with the water flow, and leaving with it" is the main reason that led to the increase and decrease of chemical properties at first stage and second stage, and with the uprising water level, more and more salinities in soil profile dissolved into ground water and the severe evaporation resulted the concentrations of major ions and TDS increase at late stage. Furthermore, the variations of groundwater chemistry at the intermission of water deliveries have close relationship to the three stages. It should be pointed out that the mode of water transport in surface scope is infeasible due to the climate characteristics of the lower reaches of the Tarim River.
Chen
Yong-jin
YJ
Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China. yongjinchen2004@yahoo.com.cn
Chen
Ya-ning
YN
Li
Wei-hong
WH
Liu
Jia-zhen
JZ
D002681:China; D017753:Ecosystem; D005618:Fresh Water / Q000032:analysis* / Q000737:chemistry; D045483:Rivers; D012987:Soil / Q000032:analysis*; D014872:Water Movements
D012987:Soil