Although many researchers have mentioned the importance of the lake ecosystem sustainability [14], the effective restoration is still subject to the absence of sound and scientific remedial goals to measure the sustainability. Setting suitable restoration goals depends on identifying a “basic level” by which one can tell whether the environment is better or worse [15]. Generally, identification of a “basic level” can be difficult as a significant amount of information or data is required. “Basic level” can be used as criteria to measure whether the ecosystem needs to be restored and to what degree. Subjectively setting the levels may result in impractical restoration goals due to the neglect of some important factors (e.g. techniques or funds). In a general way, reference information is collected under the historical states of the study ecosystem or the similar unaltered ecosystem [20-22].