dry up

If a river, lake, etc. dries up, the water in it disappears.

If a supply of something dries up, it ends:
His main source of work had dried up, leaving him short of money.
(Cambridge Advanced Learner's Dictionary & Thesaurus からの dry up の定義 © Cambridge University Press)

to no longer exist or be available:
Their wholesale business has largely dried up.
Money is drying up for people seeking home-equity loans or lines of credit to finance projects.
(Cambridge ビジネス英語辞典 からの dry up の定義 © Cambridge University Press)

- Cambridge Dictionary