干旱区生态环境知识资源中心(Arid): 荒漠地下水的大气降水补给及其环境意义以阿拉善高原晚全新世记录为例

Arid

	荒漠地下水的大气降水补给及其环境意义以阿拉善高原晚全新世记录为例
其他题名	ATMOSPHERIC PRECIPITATION RECHARGE ON GROUNDWATER IN DESERT AREAS AND ITS ENVIRONMENTAL IMPLICATIONSA CASE REVIEW OF THE LATE-HOLOCENE RECORDS FROM THE ALASHAN PLATEAU
	朱秉启 1; 于静洁 1; 王平 1; 张一驰 1; 闵雷雷 ; 杜朝阳 1; 王训明 1; 熊黑钢
来源期刊	第四纪研究
ISSN	1001-7410
出版年	2014
卷号	34 期号:5 页码:994-1012
中文摘要	在荒漠地区选择何种方法开展地下水的补给及其环境响应研究,是目前干旱区水文学的一个难点和热点问题。本文回顾了前人在相关研究中所选择的包气带示踪方法理论及问题,以我国北方阿拉善高原荒漠为例提取了区域地下水补给和演化的有效信息,并提供了与之相关的环境变化历史的理解。基于氯质量平衡理论所估算的荒漠非饱和带补给速率与年代学序列等研究表明:阿拉善高原中部巴丹吉林沙漠及周边戈壁等地区在晚全新世距今约700~2000年历史上,经历了数次百年尺度的地下水补给波动过程,并与区域干湿气候波动密切相关;多个剖面记录可以识别出近千年来4个相对湿润(1330~1430年、1500~1620年、1700~ 1780年和1950~ 1990年)以及3个相对干旱(1430~1500年、1620~1700年和1900~1950年)的时段。这些记录与青藏高原北缘地区的其他古气候记录具有一致性,并与我国东部气候记录有一定的对应,表明阿拉善高原地下水补给广泛反映了百年尺度上我国西北地区大尺度范围内的气候干湿变化程度,并且可能受到了东亚夏季风强度变化的影响。估算的阿拉善近千年以来的平均补给速率约为1.3~2.6mm/a,为理解区域地下水补给来源问题带来新的地质证据,但目前的研究结果与其他环境记录有较大出入。需要指出,包气带剖面的环境记录具有很多不确定性,主要来自于氯质量平衡估算中的大气Cl输入量假设和均质土壤包气带剖面(活塞流)的选择。我们认为未来应当通过对比确定性的数据(如区域基准站)和大尺度随机大气Cl输入背景来广泛检验这个不确定性及其误差;并对非饱和带地层的结构均质性、水分平流传输与扩散传输机制的相对重要性以及特征时段的氯凸剖面等,提供沉积学、水力学和地球化学等证据的约束。
英文摘要	A difficult but key question for hydrologists is concerned with the choice of the right methods for quantitatively evaluating the groundwater recharge and its related environmental response in arid lands. In this paper, we reviewed the literature to assess the current research work and existing problems related to the tracing methods and theories selected to study the unsaturated (vadose) zone recharge in desert. A lot of information about the regional groundwaters,their recharge and evolution was obtained from case studies on the Alashan Plateau in Northwestern China,aiming to shed light on the history of related palaeoenvironmental change in this desert during the Late Holocene. Based on chronological sequences and calculated recharge rates in multiple unsaturated zone profiles from the desert using the chloride mass balance theory,results indicate that the Badanjilin desert in the central part of the Alashan Plateau and surrounding Gobi areas have experienced several centennial-scale fluctuations in groundwater recharge during the Late-Holocene in the last 700 to 2000 years, which were closely related to the wet-and-dry fluctuations in regional climate. Four relatively humid (1330 ~ 1430A.D.,1500 ~ 1620A.D., 1700 ~ 1780A.D. and 1950 ~ 1990 A.D.) and three relatively arid phases (1430 ~ 1500A.D.,1620 ~ 1700A.D. and 1900 ~ 1950A.D.) are discernable across these unsaturated profiles. These records are consistent with other palaeoclimatic records from the northern fringes of the Qinghai-Tibetan Plateau and are somewhat corresponding to the climatic records from Eastern China, indicating that the groundwater recharge history on the Alashan Plateau broadly reflect centurial timescale precipitation changes in the large areas of Northwestern China. It also suggests that variations in the East Asian Summer Monsoon intensity could have affected the desert recharge rates. The evaluated average groundwater recharge rate is about 1. 3~2. 6mm/a on the Alashan Plateau over the last thousand years. This evaluation provides a new geological evidence for the understanding of the sources of the regional groundwater recharge but is somewhat conflicting with previous conclusions derived from other environmental proxy records from the plateau. We point out that the environmental records derived from unsaturated profiles have many uncertainties,caused mainly by the assumptions about the atmospheric origin of the Cl input in the chloride mass balance theory and the selection of homogeneous structure of soil unsaturated zone (piston-flow profile). We suggest that a broader test is needed to examine the uncertainties of the atmospheric Cl-input and their error ranges through comparison between the deterministic data (such as regional base weather station) and the large-scale random Cl input settings of dust and precipitations (dry and wet deposition) in Northwestern China. Sedimentological, hydraulic and geochemical evidences should also be provided for the potential constraints on the structure homogeneity of unsaturated profiles, the relative importance of soil moisture transport mechanisms between horizontal and diffuse processes, and the chloride-bulge-shaped curves of salt sequences indicating characteristic periods in unsaturated zone profiles.
中文关键词	地下水补给 ; 非饱和带 ; 氯质量平衡理论 ; 古大气降水 ; 晚全新世 ; 阿拉善高原
英文关键词	groundwater recharge unsaturated zone (vadose zone) Chloride mass balance palaeo-atmospheric precipitation Late Holocene the Alashan Plateau
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5235974
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231020
作者单位	1.中国科学院地理科学与资源研究所, 中国科学院陆地水循环及地表过程重点实验室, 北京 100101, 中国; 2.中国科学院地质与地球物理研究所, 中国科学院新生代地质与环境重点实验室, 北京 100029, 中国; 3.Centro de Investigaciones en Geografia Ambiental, Universidad Nacional Autonoma de Mexico, Campus Morelia, Mexico
推荐引用方式 GB/T 7714	朱秉启,于静洁,王平,等. 荒漠地下水的大气降水补给及其环境意义以阿拉善高原晚全新世记录为例[J]. 中国科学院地理科学与资源研究所,2014,34(5):994-1012.
APA	朱秉启.,于静洁.,王平.,张一驰.,闵雷雷.,...&熊黑钢.(2014).荒漠地下水的大气降水补给及其环境意义以阿拉善高原晚全新世记录为例.第四纪研究,34(5),994-1012.
MLA	朱秉启,et al."荒漠地下水的大气降水补给及其环境意义以阿拉善高原晚全新世记录为例".第四纪研究 34.5(2014):994-1012.