In the early years, the government set aside a zone of about 500 meters wide and covering more than 1,000 hectares at the edge of the Deep Bay Wetland Conservation Area (WCA), designated as the Wetland Buffer Zone (WBA), which serves as a barrier to the conservation area. The ratio is generally only allowed to be 0.2 to 0.4 times. Developers need to conduct ecological impact assessment for the site for development projects in the area, and the result must be that the development will not cause irreversible negative impacts, otherwise it cannot be carried out.
However, with the decline of the freshwater fish farming industry, many fish ponds in the buffer zone are now abandoned, and occasionally illegal uses have occurred. Lands lacking effective management look more like a pile of abandoned grasslands, and their conservation or buffering functions have been weakened. In recent years, there have been voices saying that this land is being wasted seriously. It is also worth noting that the "Study on the Ecological Value of Fish Ponds in the Deep Bay Area" completed in 1997 has been more than 20 years old, and no review has been made.
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