The dynamic of groundwater level in the lower reaches of Tarim River affected by transported water from upper reaches

Using the grey system theory and the observed data from the monitoring section of Yingsu, the paper studied the dynamics of groundwater level in the lower reaches of Tarim River affected by transported water from upper reaches. The main findings are as follows: 1) the groundwater level has revealed an upward trend versus time since 2000, but downward trend versus the distance from the river centre at the same time; 2) the discharging volume, running days of water diversion and discharging water per day, are the three main parameters that markedly affect the groundwater level; 3) transported water from upper reaches not only markedly raised the groundwater level near river bank, and caused the groundwater level rising within the range of 1,050 m from the river centre.