Irrigation information remote sensing monitoring method in intelligent water conservancy digital scene construction

The invention discloses an irrigation information remote sensing monitoring method in intelligent water conservancy digital scene construction, which comprises the following steps: carrying out wave band calculation on a satellite image, obtaining a normalized vegetation index (NDVI) of each pixel point, and establishing an NDVI time sequence remote sensing data set; extracting an NDVI time sequence curve of a target crop under an irrigation condition according to a ground real sample point obtained by field investigation as a standard spectrum; respectively calculating a spectrum comprehensive similarity index of each pixel point according to the standard spectrum; defining a threshold value, and extracting the irrigation area of the target crop; and with different types of crops as targets, integration is carried out to form an irrigation crop type and an irrigation area space-time distribution diagram thereof. The method provided by the invention is used for extracting the irrigation area of the crops, inc