Method for determining surface runoff yield in vegetation-covered area

A method for determining a surface runoff yield in a vegetation-covered area, comprising:

• obtaining climate data and spatial data, wherein the climate data comprises:
• annual rainfall, individual rainfall, vegetation coverage, leaf area index, snowmelt, average natural water content and maximum water holding capacity;
• the spatial data comprises:
• average maximum water holding depth per leaf area, litterfall accumulation, soil water storage, annual forest evapotranspiration and annual grassland evapotranspiration;
• preprocessing the climate data and the spatial data to obtain preprocessed data;
• calculating a vegetation canopy interception water storage based on a preprocessed average maximum water holding depth per leaf area, vegetation coverage and leaf area index;
• calculating a vegetation litterfall interception water storage based on a preprocessed average natural water content, maximum water holding capacity and litterfall accumulation;
• determining a maximum forest interception water storage based on the vegetation canopy interception water storage, the vegetation litterfall interception water storage and preprocessed soil water storage;
• determining a water conservation based on the maximum forest interception water storage;
• determining an annual total vegetation evapotranspiration by using Zhang's hypothesis based on preprocessed vegetation coverage, annual forest evapotranspiration and annual grassland evapotranspiration;
• and
• determining a vegetation runoff yield based on the vegetation canopy interception water storage, the litterfall interception water storage, the water conservation, the annual total vegetation evapotranspiration and preprocessed annual rainfall and snowmelt.