Is it permissible to read certain verses and chapters of the Qur'an and supplications over water and then drink it to strengthen memorization and reduce forgetfulness?

The virtue of reading the Quran and the mentioned supplication is established. However, specifying certain surahs or verses, or a particular supplication, with a specific virtue or effect requires Shariah-based evidence; otherwise, it would be considered an added innovation (bid'ah). A Muslim is advised to turn to their Lord to be granted memorization and understanding, and to avoid forgetfulness, without adhering to a specific method for which there is no Shariah-based evidence.