Author(s): Chenglin Liu, Xia Hu, Xingdong Zhang, Chenjun Zeng
Linked Author(s): Xia Hu
Keywords: Poyang Lake area, landscape index, gray correlation analysis, flood storage capacity.
Abstract: With a variety of ecological service functions, Poyang Lake is also the largest freshwater lake in China. This study is based on the fundamental data of landscape pattern in 1990, 2000, 2005 and 2010 and the corresponding hydrological data, build the database in landscape pattern as well as flood storage capacity, and then proceed with further analysis on the change of flood storage capacity. The response relation and mechanism between landscape pattern and hydrological adjusting function is revealed by using grey correlation analysis. The results indicate that both regulation and storage capacity are of great state to protect drainage basin in Poyang Lake area from 1990 to 2010. There was a clear relationship between the landscape pattern and adjusting functions at different degrees, it is demonstrated that landscape plays an important role in economic development and ecological security, influence the function of flood storage at the same time. On the whole landscape, the correlation degree is largest between flood storage capacity and the diversity index (SHDI), which reaches 0. 75. It shows that the regulation and storage capacity could be promoted when landscape pattern presented diversity. However, on the single landscape, the correlation degree between flood storage capacity and woodland area is also largest, with the value of 0. 85, which explains that woodland would be helpful for water conservation and effective to change distribution around groundwater, soil water, runoff and evaporation
Year: 2017