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_30694 ( "Reservoir" text, "Basin" text, "Location" text, "Type" text, "Height (m)" text, "Length along the top (m)" text, "Drainage basin (km\u00b2)" text, "Reservoir surface (ha)" text, "Volume (hm\u00b3)" text )

### Question ###
What is listed in drainage basin when the type is gravity and the reservoir surface is 34.36?

### Accurate SQL ###

SELECT "Drainage basin (km\u00b2)" FROM table_30694 WHERE "Type" = 'Gravity' AND "Reservoir surface (ha)" = '34.36'