干旱区生态环境知识资源中心(Arid): 科尔沁沙丘草甸相间地区不同地貌类型地下水位对降雨的响应研究

Arid

	科尔沁沙丘草甸相间地区不同地貌类型地下水位对降雨的响应研究
其他题名	Response of groundwater level to rainfall in different types of landscape in dune-meadow interphase region of Horqin
	孙傲 1; 刘廷玺 1; 杨大文 2; 段利民 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2016
卷号	39 期号:5 页码:1059-1069
中文摘要	通过对科尔沁沙地典型沙丘草甸相间地区天然降雨和地下水位数据的联合观测,研究了科尔沁沙地七种地貌类型下地下水位对不同等级降雨的响应关系,对比分析了同一次降雨对不同地貌类型区地下水位的影响和同一地貌类型区地下水位对不同降雨事件的响应。结果表明:(1)降雨量<13 mm和4 mm的降雨事件对流动、半固定沙丘和固定沙丘、沙丘林地的地下水位没有影响。(2)大雨量事件发生后,沙丘地区地下水位会有一段时间的下降期,但在此期间当降雨强度达到某一临界值时地下水位会发生突变。(3)在一些较小级别的降雨过程中,草甸区地下水位在快速上升期的水位升幅会大于一些较大量级的降雨。(4)耕地对干旱区草甸地下水的补给和附存有明显的不利影响。研究结果对该地区生态环境的保护具有一定的指导意义。
英文摘要	Based on the soil and ecological survey and data of rainfall and groundwater level, this paper comparatively analyzed the response relationship between groundwater level and rainfall in different landform types (including mobile dunes, semi-fixed dunes, fixed dunes, woodland at dune site, high coverage meadow, plough of meadow and low coverage meadow) in the dune-meadow alternate region in Horqin, Inner Mongolia, China, the impact of an identified rainfall on the groundwater levels in different landform types,and impact of different rainfall to the groundwater levels in an identified landform type. The results show as follows: (1) the rainfall events less than 13 mm had no impact on the groundwater level in the mobile and semi-fixed dunes, and the rainfall events less than 4 mm had no effect on the groundwater level in the fixed dune and woodland at dune site; in dune area, the underground water level increased with the increase of the vegetation coverage, and the lag time of the rise of underground water level declined with the increase of the vegetation coverage; (2) after a larger rainfall event, the groundwater level of mobile and semi-fixed dunes had a clear downward trend; however, if the rainfall intensity reached 40 mm ? h~(-1) in mobile dunes or 22 mm ? h~(-1) in semi-fixed dunes,the groundwater level might occur mutation; (3) if the previous rainfall was effective rain, and the two rainfalls were within a short interval, the previous rainfall would influence the dry sand bed thickness and soil moisture,then promote the recharge of groundwater with rain, and this kind of promotion was more obvious in dune than in meadow; (4) in meadow area,rainfall intensity greatly influenced the groundwater level which was obviously affected by the seasonal and surface vegetation coverage, and the fluctuation of groundwater level was more significant after rain;(5) because of the shallow depth of the groundwater level in meadow area, capillary water was close to or even extended to the ground; in some small rainfall events, the groundwater level would rise higher than that in some greater rainfall events; (6) plough had a significant negative effect on the recharge and storage of groundwater in the meadow of arid area. Plough and over grazing had an obvious negative effect on the conservation of groundwater after rain in the meadow of arid area, but this article cannot give the quantization result of rational exploitation, which needs supplement and perfection of data. In addition, afforestation and maintenance of high coverage of surface vegetation is conducive to the storage of groundwater and rainfall recharge of groundwater, and giving priority to ecological management in dune-meadow transition zone near the lake and meadow whose groundwater discharge is weak has more advantages to the storage of shallow groundwater.
中文关键词	科尔沁沙地 ; 地下水位 ; 不同地貌类型 ; 沙丘-草甸相间地区 ; 降雨的响应
英文关键词	Horqin sandy land groundwater level different landforms alternate area of dune and meadow response of rainfall
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:5806955
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234262
作者单位	1.内蒙古农业大学水利与土木建筑工程学院, 呼和浩特, 内蒙古 010018, 中国; 2.清华大学水利水电工程系, 北京 100020, 中国
推荐引用方式 GB/T 7714	孙傲,刘廷玺,杨大文,等. 科尔沁沙丘草甸相间地区不同地貌类型地下水位对降雨的响应研究[J]. 内蒙古农业大学,2016,39(5):1059-1069.
APA	孙傲,刘廷玺,杨大文,&段利民.(2016).科尔沁沙丘草甸相间地区不同地貌类型地下水位对降雨的响应研究.干旱区地理,39(5),1059-1069.
MLA	孙傲,et al."科尔沁沙丘草甸相间地区不同地貌类型地下水位对降雨的响应研究".干旱区地理 39.5(2016):1059-1069.