Evaluation of the water conservation function in the Ili River Delta of Central Asia based on the InVEST model

CAO Yijie, MA Yonggang, BAO Anming, CHANG Cun, LIU Tie

Fig. 10 Temporal variations in the annual water conservation volume and annual runoff at the Uskerma hydrological station (a), and the changes of the water level of the Lake Balkhash (b) in the IRD from 1975 to 2020. The red line shows the connection between the maximum and minimum water levels during the period 1975-1990, reflecting sharp drop in the water level; the orange line shows the connection between the water level in 1990 and the maximum water level during the period 1990-2020, reflecting an increase in the water level.