yóu / yú / cháng / qī / gān / hàn / zhè / gè / dì / qū / de / shuǐ / yuán / zhú / jiàn / kuì / jié

由于长期干旱，这个地区的水源逐渐匮竭。

Because of the prolonged drought, the water sources in this area are gradually being exhausted.