Shift of water bodies pattern and its maintenance mechanism in the Baiyangdian Lake Basin,China
Influenced by climate changes and anthropogenic activities,river discharge into Baiyangdian Lake has decreased dramatically,which has profoundly changed the spatial distribution pattern of water bodies in the Baiyangdian Lake Basin.The shift of water body pattern and its maintenance mechanism still remain un-certainty.This study simulated natural streamflow using VIC model,which was compared with actual ob-served streamflow to explain the streamflow reduction pattern,and distribution pattern of water bodies were also explored using GRACE data in the Baiyangdian Lake Basin,China.The results showed that:1)The aver-age annual inflow to Baiyangdian Lake was 23.79xl08m3 for the natural scenario,while it was only 8.59 × l08m3 for the actual scenario and showed a decreasing trend;2)The upstream river discharge may be meet the water consumption of Baiyangdian Lake for the natural scenario.Actually,the river discharge could meet the water con-sumption of the lake only in 1960-1979,and the lake had a long-term water deficit in 1980-1997,and was mainly recharged by an ecological water supply project in 1998-2016;3)Terrestrial water storage in the Baiyangdian Lake Basin decreased significantly,and the decrease was greater in the southwestern basin than in the northeastern basin.Reduced water resources,an imbalance between water supply and consumption of Baiyangdian Lake,and over-reli-ance on artificial water allocation increase the water resource risk in the Baiyangdian Lake Basin.In particular,imple-menting the Xiong'an New Area Project has brought additional challenges to securing water resources in a chan-ging climate,especially in water resource management and regulation.
VIC modelriver dischargeterrestrial water storage variationthe Xiong'an New Areathe Baiy-angdian Lake Basin
万方数据
维普
