Retrieval method and apparatus for reservoir water storage

A retrieval apparatus for reservoir water storage, comprising:

• an image acquisition module, configured to acquire a synthetic aperture radar (SAR) image sequence covering target local waters of a target reservoir;
• an area computation module, configured to determine a water area sequence of the target local waters by using a classification algorithm on a cloud computing platform according to the SAR image sequence, the classification algorithm comprising a random forest (RF) algorithm;
• a relationship computation module, configured to acquire an initial water level sequence of the target reservoir according to at least one of a laser altimetry satellite and a radar altimetry satellite, obtain an initial partial water area sequence, corresponding to the initial water level sequence, from the water area sequence according to time information corresponding to the initial water level sequence, and obtain a first relationship between a water level of the target reservoir and a water area of the target local waters of the target reservoir based on the initial water level sequence of the target reservoir and the initial partial water area sequence of the target reservoir;
• a water level computation module, configured to convert the water area sequence into a target water level sequence according to the first relationship;
• and
• a water storage computation module, configured to obtain a water storage sequence of the target reservoir according to a water level-water storage relationship curve and the target water level sequence.