However, in wet seasons, the major source of groundwater is mainly from the groundwater divide on the south region near 本区地下水于枯水季时主要由中央山脉的侧流补注，丰水季时则主要由含水层上游的马鞍溪补注。
In addition, we found a obvious groundwater divide on the south side of Ma-An river.中层是为封闭的含水层，深层地下水在枯水季有高山区域流达的水源。