Guo: it seems that refilling the open-cast mining site with groundwaterseepage and making them a new lake system is one of the popular strategies here.
郭：似乎利用外溢的地下水将露天矿场改造成新的湖泊系统是这里很常见的策略之一。
2
Water gradually escapes by seepage through the ground.
水逐渐从地上渗走了。
《牛津词典》
3
Researchers propose that the thin films of water may have entered the ground from frost or snow, and the seepage could have happened during cyclical climate changes.