干旱区生态环境知识资源中心(Arid): 石羊河流域水化学演化与地下水补给特征

Arid

	石羊河流域水化学演化与地下水补给特征
其他题名	Chemical Evolution and Recharge Characteristics of Water Resources in the Shiyang River Basin
	马金珠; 李相虎; 黄天明
来源期刊	资源科学
ISSN	1007-7588
出版年	2005
卷号	27 期号:3 页码:117-122
中文摘要	以地球化学和包气带氯质量平衡技术相结合,通过腾格里沙漠包气带沙芯记录和石羊河流域地下水、地表水地球化学的研究,探讨中国西北干旱区地下水补给历史及其气候特征和地下水地球化学演化规律.石羊河流域水化学在天然状态下具有水平分带性,上游地表水矿化度小于360mg/l,下游达1 000mg/l;武威盆地洪积扇地下水主要为HCO3-SO4型水,至民勤终端湖演变为Cl-SO4型水,矿化度相应由500mg/l增加为17g/l左右.在腾格里沙漠的一个钻孔剖面记录了过去930年以来的补给量变化过程及其所反映的气候波动特征,氯质量平衡法计算的地区补给量平均仅为1.26mm,从剖面完整的记录可以将930aBP气候划分为4个干期和3个湿期.
英文摘要	Based on geochemical technology and chloride mass balance method, a case study of unsaturated zone profile in the Tengger desert and groundwater in the Shiyang river basin has been taken up in order to understand groundwater recharge process and geochemical evolution in arid area of the Northwest China. The trends of the major elements both in the groundwater and river follow a progressive sequence of geochemical evolution. The total dissolved solid in the river from Mountains is about 360 mg/ 1, and it is more than 1 500mg/l in the Plain. Groundwater quality is good in the middle and upper reach of the river while high salinity in the Minqin basin. The chemicals are evolved from alkali-sulphate type in the recharge area to alkali-sulphate-chloride type along the river flow. In sedimentary rock, sulphate ions are derived from gypsum of anhydrite in the deep marlaceous matrix. High concentration of Na and SO42~ in comparison with Ca2+ and Cl" are indicative of dissolution of Glauber’ s salt. The recharge of precipitation to groundwater in the arid zone is estimated to be 1.26 mm yr" l , giving a mean rainfall of 110mm. The climatic change events of 10 ~ 20 years duration were well preserved in the unsaturated zone profile. There are three wet phases and four dry episodes in the recent 930 years according to the peaks and troughs of recharge rate calculated through chloride concentration and moisture content.
中文关键词	水化学 ; 矿化度 ; 地下水补给 ; 氯质量平衡 ; 石羊河流域
英文关键词	Water chemistry Groundwater recharge Total dissolved solid Chloride mass balance Shiyang River Basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:1988463
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/207102
作者单位	兰州大学, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	马金珠,李相虎,黄天明. 石羊河流域水化学演化与地下水补给特征[J]. 兰州大学,2005,27(3):117-122.
APA	马金珠,李相虎,&黄天明.(2005).石羊河流域水化学演化与地下水补给特征.资源科学,27(3),117-122.
MLA	马金珠,et al."石羊河流域水化学演化与地下水补给特征".资源科学 27.3(2005):117-122.