What is more, as the ground sinks, the dikes built by the Water Conservancy Bureau have been losing their effectiveness.
但是到了民國六十七年，地下水抽多了之後，積水長久不退，水利局只得一再興建海堤，保護區內居民、住宅和塭區的安全。遺憾的是，興建海堤的功能，卻被地層下陷所抵消，海水仍然不時越堤而過，造成接二連三的水患。