Groundwater Dynamic Characteristics with the Ecological Threshold in the Northwest China Oasis

Suitable groundwater level is an important foundation for the stability of ecological environment, and healthy development social economy, in arid area Northwest China. The Manas River Basin a typical oasis area, where problems salinization desertification are prominent. By analyzing variation characteristics study from 2013 to 2019 combined with remote sensing technology—according theory capillary water rise phreatic evaporation—a mathematical calculation model threshold established determine level. results show that (1) fluctuates by 0.2–18 m throughout year, drawdown 5–35 2019; (2) upper 0.82–4.05 lower 3.35–10.23 m; (3) shortage 9755.36 km2, deficit 105.741 × 108 m3. This can provide theoretical basis determination level, optimal allocation resources, environment management