Method for monitoring change of vegetation water conservation

A method for monitoring a change of vegetation water conservation, wherein the monitoring method comprises:

• obtaining global land water storage change data, as well as precipitation, actual evapotranspiration, soil moisture storage, snowmelt, snow water storage, surface water storage, groundwater storage, change in surface and groundwater resources, litterfall interception water storage, average natural water content, maximum water holding capacity and litterfall accumulation, wherein the global land water storage change data is obtained from Gravity Recovery and Climate Experiment (GRACE);
• preprocessing the global land water storage change data, the precipitation, the actual evapotranspiration, the soil moisture storage, the snowmelt, the snow water storage, the surface water storage, the groundwater storage, the change in surface and groundwater resources, the litterfall interception water storage, the average natural water content, the maximum water holding capacity and the litterfall accumulation, to obtain preprocessed data;
• calculating a change of vegetation canopy water storage by a general equation for global land water balance according to the preprocessed data;
• calculating a change of litterfall interception water storage according to the preprocessed data;
• calculating a soil moisture change according to the preprocessed data;
• and
• determining a water conservation change according to the change of vegetation canopy water storage, the change of litterfall interception water storage and the soil moisture change.