京津冀生态屏障区景观格局变化及其对水源涵养的影响

选择京津冀重要水源涵养区--滦河，潮河和白河流域，通过分析2010与2015年土地利用的变化及景观格局演变，研究该研究区的土地利用转移与景观格局特征的时空分布与变化特点；运用SWAT水文模型模拟分析该时段内研究区的水源涵养量分布与变化；并和降水分布特征进行对比分析.利用偏相关分析法，重点分析了景观格局的变化对水源涵养量的影响.结果表明水源涵养量与PLAND指数相关性为-0.846；与NP指数相关性为-0.635；与LPI指数相关性为0.468；与LSI指数相关性为0.523；与COHESION指数显著相关，相关性为0.918.景观格局和水源涵养量存在以下关系：①景观多样性越高，聚集程度越高，景观形状越复杂，越趋向不规则且优势度越高，越有利于水源涵养；②景观的破碎化程度越高，水源涵养量越低.

Landscape pattern change of the ecological barrier zone in Beijing-Tianjin-Hebei region and its impact on water conservation

The research was conducted in the Luanhe, Chaohe and Baihe river basins, which were the important water conservation areas of Beijing-Tianjin-Hebei region. By analyzing the changes of land use and landscape pattern in 2010 and 2015, the spatial and temporal distribution and characteristics of land use transfer and landscape pattern were studied. The distribution and change of water conservation in the study area during this period were simulated by SWAT model and compared with precipitation. Also, the influence of landscape pattern change on water conservation were calculated by partial correlation analysis method. The results showed that the correlation coefficients between water conservation and PLAND, NP, LPI, LSI, COHESION indices were -0.846, -0.635, 0.468, 0.523, 0.918, respectively. The relationships between landscape pattern and water conservation were concluded as followed:Water conservation would be increased when the higher landscape diversity, higher degree of aggregation, more complex, irregular and dominant of the landscape shape were shown, Fragmentation of the landscape might cut down the water conservation capacity significantly.