关键词: 科尔沁沙地, 地下水埋深, 时空变化

Abstract:

From the well-monitoring data of groundwater depth in period from 2002 to 2006 in the Naiman Banner, Horqin Sand Land, this paper selected the data of 18 monitoring sites which distributed at three typical belts to analyze the change of groundwater depth and its relationship with precipitation at temporal and spatial scales. The results indicated that the groundwater depth of the typical zone all increased in the five years. By the Jiaolaihe River, the groundwater depth change was larger than that of the other two belts and its annual variation of groundwater depth reached to 2.11 meters, its change range was from 13.6% to 51.4%. The spatial changes of groundwater depth showed that the groundwater depth by the Jiaolaihe River was the largest among the three belts; its average depth was 6.15 meters in these five years. The highest groundwater depth appeared in March or April, and the lowest one was in August or September in all three belts in a year. Analysis on relationship between precipitation series or the multiyear average precipitation with the groundwater depth of the corresponding period showed that precipitation had little effect on groundwater depth dynamics.

Key words: Horqin Sand Land, groundwater depth, temporal and spatial changes