In terms of individual months, July included 2 severely dry years and 1 moderately dry year;
August included 1 severely dry year and 2 moderately dry years; for September, there was 1 severely
dry year. With the increase in precipitation, dry years were gradually reduced, and the degree of
flooding gradually increased. In both August and September, there was 1 severely wet year and 1
extremely wet year. It is obvious that the results in each month in summer are so different, that it is
important to know not only the whole situation in summer, but also the separate situation in each
month, so as to attain information on the drought and flood situation in each , which have further
influences on the rice NDVI.