Wells were often Stopped up by Enemies
Source: TTT
Genesis 26:15, 18
So the Philistines took dirt and stopped up all the wells that his father’s servants had dug in the days of his father Abraham. / Isaac reopened the wells that had been dug in the days of his father Abraham, which the Philistines had stopped up after Abraham died. And he gave these wells the same names his father had given them.
2 Kings 3:19, 25
And you shall attack every fortified city and every city of importance. You shall cut down every good tree, stop up every spring, and ruin every good field with stones.” / They destroyed the cities, and each man threw stones on every good field until it was covered. They stopped up every spring and cut down every good tree. Only Kir-haraseth was left with stones in place, but men with slings surrounded it and attacked it as well.