For example, the Taipei County Bureau of Agriculture plans to build a slipway in the dunes just outside the Waziwei conservation area for fishing boats to offload their catches. Because the site is outside the protected zone, no environmental impact study is mandated. Lai Jung-hsiao estimates that the constructing the slipway will block the flow of sand out of the river, worsening the problems of siltation and land formation.
以挖仔尾保護區外的沙丘區為例，北縣農業局計畫在那兒蓋一座供漁船進出卸貨用的「曳船道」，由於位在保護區外，不需要經過環評程序，賴榮孝預估曳船道構造物勢必攔下海沙，使之無法漂出河口，導致淤沙、陸化的情況惡化。