Hawzah News Agency – Q: Is it permissible for one to intentionally become junub during the night in the month of Ramadan even if he does not have water or has some other excuse (except shortness of time)?

A: It is permissible when his obligation is to perform tayammum and he has sufficient time to perform it.

Source: https://www.leader.ir/en/book/32/Practical-Laws-of-Islam