Even supposing the humpback dolphins could put up with the underwater noise, an even more nettlesome problem would be their ability to navigate the deep waters into which they would be forced after completion of the project. Once a shipping channel has been dug, dolphins much better accustomed to waters ranging from 10 to 20 meters in depth would suddenly have a daunting new depth to negotiate.
就算白海豚能熬得過海上施工期的噪音與擾動，港區建成後的新難題──水深──更是棘手，因為對習慣在深度 10 公尺以內海域嬉遊的台灣白海豚來說，挖深航道後的水深，將構成另一道難以跨越的阻絕障礙。