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_name_68 ( water__sqmi_ INTEGER, land___sqmi__ VARCHAR, longitude VARCHAR )

### Question ###
What's the total of Water (sqmi) with a Land (sqmi) of 35.918 and has a Longitude that is smaller than -97.115459?

### Accurate SQL ###

SELECT SUM(water__sqmi_) FROM table_name_68 WHERE land___sqmi__ = 35.918 AND longitude < -97.115459