Queries consuming most I/O:

SELECT TOP 100

    (total_logical_reads + total_logical_writes) / qs.execution_count AS average_IO,

    (total_logical_reads + total_logical_writes) AS total_IO,

    qs.execution_count AS execution_count,

    SUBSTRING (qt.text,qs.statement_start_offset/2,

         (CASE WHEN qs.statement_end_offset = -1

            THEN LEN(CONVERT(NVARCHAR(MAX), qt.text)) * 2

          ELSE qs.statement_end_offset END - qs.statement_start_offset)/2) AS indivudual_query,

    o.name AS object_name,

    DB_NAME(qt.dbid) AS database_name

  FROM sys.dm_exec_query_stats qs

    CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as qt

    LEFT OUTER JOIN sys.objects o ON qt.objectid = o.object_id

where qt.dbid = DB_ID()

  ORDER BY average_IO DESC;