河南省地表水时空分布特征研究

Characteristics of Surface Water Temporal and Spatial Distribution in Henan Province

以河南省典型样区郑州市、原阳县为例,采用多样性概念和地图比较法对不同研究区域不同时期(1988年、2001年、2004年)的地表水信息进行汇总分析,计算地表水空间分布多样性指数和不同时期的地表水空间分布相似度,以期为地表水空间分布信息研究提供一种新的评价指标。结果表明,同一研究时期内,地表水空间分布多样性指数随网格面积的增大而增大;在网格面积较小时,地表水面积与样区地表水多样性指数存在一定的正相关关系,当网格面积较大时,两者呈负相关。研究时间段间隔的大小对研究区域地表水空间分布的相似度有明显影响,研究时间段间隔越小,地表水空间分布的相似度越高;地表水面积的变化对其空间分布相似度大小也有一定的影响。

Zhengzhou city and Yuanyang county were selected as typical sample area of Henan province for analysis of surface water temporal and spatial distribution in different periods（1988, 2001 and 2004） with diversity index and spatial distribution similarity, so as to provide a new evaluation for the study of surface water spatial distribution. The results showed that, in the same study period, the diversity index was increasing with the size expanding of the grid area;for smal- ler grid size, the surface water area had some positive correlation with surface water diversity in- dex; otherwise, they had negative correlation. The research time interval had significant influence on the similarity of the surface water spatial distribution, the smaller the interval of time, the higher the similarity of the surface water spatial distribution;the surface water area changes of the sample area also had some impact on the surface water spatial distribution similarity.