Study on Eco-water Supplement for Freshwater Wetlands in the Yellow River Estuary
On the basis of vegetation forms and evolution analysis of land utilization in estuary district, the study set up the surface and underground water model of eco-water supplement in Yellow river delta. The landscape ecological decision support system of wetlands water supplement is formed. And it also built the eco-hydrology simulation system of ecological water compensation in the wetland of Yellow river estuary. Selecting Grus japonensis, Ciconia boyciana and Larus saundersi as the indicator species of eco-water requirement, the volume of simulation water supplement respectively is 2.8 × 108 m3, 3.5 × 108 m3, 4.2 × 108 m3. Under the plan of simulation water supplement, if the water supplement area is within 200 meters, the water level of underground would raise above 1 meter; if the area range from 200 to 1000 meters, it would raise from 0.1 to 1 meter. The vegetation form succession exists, and the area of wet marshes, common meadow, brushwood and so on will increase; the indicator number of birds increase significantly, and the ecological bearing capacity improve drastically, but it can't improve with the increasing volume of water supplement; the ecological function of wetland will be recovered basically, and the ecological value of wetland improve obviously. When the water increase to a certain degree, the difference of ecological value would be smaller. It is suggested that the best plan for water supplement is to supply water 3.5 × 10 m in the common years, to supply water 4.2 × 108 m3 in the drought years and to supply water 2.8 × 108 m3 in the wetter years.
freshwater wetlandeco-water supplementYellow River estuary
国家科技期刊平台
NSTL
万方数据
维普
