Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_22854436_1 (average_annual_rainfall__mm_ VARCHAR, population__2002_census_data_ VARCHAR)

### Question ###
Name the annual rainfail for 2002 population being 493984

### Accurate SQL ###

SELECT average_annual_rainfall__mm_ FROM table_22854436_1 WHERE population__2002_census_data_ = 493984