Abstract
Habitat loss is a key factor affecting Siberian crane stopovers. The accurate calculation of water supply and effective water resource management schemes plays an important role in stopover habitat restoration for the Siberian crane. In this paper, the ecological water demand was calculated and corrected by developing a three-dimensional model. The results indicated that the calculated minimum and optimum ecological water demand values for the Siberian crane were 2.47 × 108 m3~3.66 × 108 m3 and 4.96 × 108 m3~10.36 × 108 m3, respectively, in the study area. After correction with the three-dimensional model, the minimum and optimum ecological water demand values were 3.75 × 108 m3 and 5.21 × 108 m3, respectively. A water resource management scheme was established to restore Siberian crane habitat. Continuous, area-specific and simulated flood water supply options based on water diversions were used to supply water. The autumn is the best season for area-specific and simulating flood water supply. These results can serve as a reference for protecting other waterbirds and restoring wetlands in semi-arid areas.
Highlights
Wetland degradation is the main factor underlying the decline of waterbirds and poses a serious threat to the health and subsistence of waterbirds [1]
The results indicate that hydrological conditions affect the structures and features of wetland animals, plants, and microorganisms, and play an important role in wetland restoration and management [8,9,10,11]
Combining the theories and methods of ecology and hydrology, ecological water demand has been widely used in wetland hydrological restoration [15,16,17]
Summary
Wetland degradation is the main factor underlying the decline of waterbirds and poses a serious threat to the health and subsistence of waterbirds [1]. Most of this study is focused on comparing hydrology, biology, and soil before and after restoring a wetland, as well as investigating approaches to wetland restoration [3,4,5,6,7]. Combining the theories and methods of ecology and hydrology, ecological water demand has been widely used in wetland hydrological restoration [15,16,17]. Most studies on ecological water demand are focused on river ecosystems, and studies on wetlands are limited [18,19]. The study on ecological water demand of wetland is focused on concept, qualitative analysis, and empirical method estimation
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