Where is Haixing Wetland?

Haixing Wetland is located in the east of Haixing County, Hebei Province, bordering Bohai Sea in the east, Huanghua Port in the south and Zhang Weixin across the sea, with a wetland area of 29,330 hectares. Haixing Wetland and Bird Nature Reserve covers an area of 1.68 million hectares, with a total area of 77,553.3 hectares, and the wetland area accounts for 38% of the total area of the county. The landform of Haixing Wetland is quite different. Due to the crisscross of rivers and ditches, the landform features of microwave fluctuation are formed. The main landform types are: (1), and rivers: low-lying wetlands with many rivers. In the north, there is the Dakou River, which is known as the "lower tip of Jiujiang". In the south, there is the Zhang Weixin River; There are Xuanhui River, Nihe River and Dalangdian River in the middle; In the north, there are 66 rows of main canals. (2) Inter-river depression: there are traces of ancient rivers on both sides of the riverbed, with thick sediments and sticky alkaline earth and alluvial clay on the surface. Large depressions accumulate water all the year round, and some only accumulate water in summer and dry up in winter and spring. (3) Marsh: The area north of Yangcheng and south of Xuanhui was originally a lagoon, surrounded by shells and sediments deposited under the tide since Quaternary. In order to meet the needs of drainage and irrigation, Yangcheng Reservoir, a 2400-hectare reservoir, was built around the dike. (4) Hills: In the west of the wetland, there are low hills with continuous distribution of volcanic ash left by Quaternary volcanic activity, which are formed by accumulation of pyroclastic materials, with the highest elevation of 36 meters. The main mountain ranges are hills (called Mayi Mountain in ancient times) and Momo Mountain (also called Momo Mountain). Known as "Toyama". (5) Coast and Island: The wetland is adjacent to the Bohai Sea in the east, with a coastline of 29.5 kilometers, and there is a big estuary with a width of 9 kilometers in the north, which is called Dakou River. Geological history has experienced many times of seawater immersion and regression, and seawater keeps pouring in from this opening, eroding into a huge tidal gully and a series of small tidal gullies. Because the tidal trough extends into the inland, the hinterland is wide, forming a large area of mud beach. In the south, there are Zhang Weixin Estuary, Dakouhe Island, Wang Zi Island and Gaotuozi Island, among which the surface layers of Huitaizi Island, Hulutouzi Island and Fengjiawuzi Island are clayey fluvo-aquic soil with high salinity and few plants, which are the natural habitats of seabirds. Xiaowangzhuang Island has a high altitude, rich surface organic matter, well-developed soil and lush plants, and is also a place where seabirds gather.

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