干旱区生态环境知识资源中心(Arid): 岩溶槽谷石漠化治理区表层泉水化学特征研究:以重庆酉阳泔溪花椒基地老泉为例

Arid

	岩溶槽谷石漠化治理区表层泉水化学特征研究:以重庆酉阳泔溪花椒基地老泉为例
其他题名	Chemical Characteristics of Surface Spring in the Rehabilitation Area of Karst Rock Desertification: A Case Study at Laoquan in the Pepper Planting Base of Ganxi Town, Youyang County, Chongqing City, China
	邹晓岗 1; 杨琰 1; 徐刚 1; 田宁 1; 游贤慧 1; 何志立 1; 田洪明 2; 曾朱周 2
来源期刊	地球与环境
ISSN	1672-9250
出版年	2018
卷号	46 期号:6 页码:524-533
中文摘要	背斜型岩溶槽谷区石漠化治理的关键之一是要厘清地下水资源动态变化特征,尤其要开展在线高分辨率连续动态监测。本文以重庆酉阳龙潭岩溶槽谷石漠化治理区老泉监测站为例,采用PONSEL多参数自动记录仪现场测定和样品室内分析相结合的方法,研究老泉2017年完整水文年的季节和强降雨期间的水化学动态特征,利用主成分分析法探究季节尺度和强降雨期间老泉水化学组分的主要来源。结果表明:(1)在季节尺度上,受雨水稀释作用的影响,雨季泉水pH、电导率、Ca~(2+)、HCO_3~-、Mg~(2+)低于旱季;土壤受淋溶作用的影响,泉水K~+、Na~+、全Mn、Al~(3+)、全Fe浓度雨季高于旱季;水化学变化主要受4个主成分影响,累计贡献率为85.53%,但主导要素是水岩作用及土壤元素流失;(2)强降雨期间,石漠化背景下泉水水化学指标对降雨响应迅速,但在植被不同生长状态下各指标差异明显;典型的两次强降雨过程中水化学变化都主要受4个主成分影响,累计贡献率分别为85.63%和85.40%,但主导要素是农业活动和土壤元素流失;(3)花椒树种植后泉水中NO_3~-、SO_4~(2-)质量浓度较高,且硫酸和硝酸参与岩溶作用过程并对老泉水质造成重要影响。因此,背斜型岩溶槽谷表层泉水化学特征的监测研究,对于槽谷石漠化治理区水资源高效利用具有重要现实意义。
英文摘要	Understanding dynamic characteristics of groundwater resources by carrying out the continuous and dynamic high resolution online monitoring is necessary for controlling the rocky desertification in anticlinal karst valleys. Take the Laoquan spring monitoring station in the Longtan karst valley, Youyang County of the Chongqing city, as an example and use methods of PONSEL multichannel automatic date logger, field testing and indoor analysis to study dynamic characteristics of water chemistry at seasonal time scale and in heavy rainfall events of 2017. The sources of hydrochemical components of the Laoquan spring were estimated by the principal component analysis(PCA) for both seasonal time scale and heavy rainfall event. The results showed that:(1) seasonally, pH, conductivity, and concentrations of Ca~(2+), HCO_3~- and Mg~(2+) were lower in the rainy season than in the dry season due to the dilution of rain, while concentrations of K~+, Na~+, total Mn, Al~(3+) and total Fe were higher in the rainy season than in the dry season due to the higher soil leaching in the rainy season. The PCA analysis showed that the change of water chemistry are affected mainly by four principal components, whose cumulative contribution rate is up to 85.53%, while the most important two factors are the water- rock interaction and the loss of soil elements;(2) in terms of heavy rainfall events, chemical properties of the spring water in the rocky desertification background responded rapidly to rainfall but variations of water chemistry indexes were obviously different under different vegetation conditions; the water chemistry changes in two typical heavy rainfalls were affected mainly by four principal components, the cumulative contributions are 85.63% and 85.40%, respectively, but the most important two factors were the agricultural activity and the loss of soil elements;(3) concentrations of NO_3~- and SO_4~(2-) in the Laoquan spring increased after planting of pepper plants, such sulfuric and nitric may participate in karstification processes and exert important impacts on the water quality of Laoquan. Therefore, the monitor and research on dynamic characteristics of the surface spring in the anticlinal karst ridge-trough is of great practical significance for the efficient utilization and management of water resources in the rocky desertification area.
中文关键词	石漠化 ; 槽谷 ; 岩溶泉水 ; 水文地球化学 ; 重庆市酉阳县
英文关键词	rocky desertification trough valley karst spring hydrogeochemistry Youyang in Chongqing City
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:6388859
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237459
作者单位	1.西南大学地理科学学院;;国土资源部岩溶生态环境-重庆南川野外基地, 岩溶环境重庆市重点实验室;;, ;;, 重庆;;重庆 400715;;408435, 中国; 2.重庆和信农业发展有限公司, 重庆 409800, 中国
推荐引用方式 GB/T 7714	邹晓岗,杨琰,徐刚,等. 岩溶槽谷石漠化治理区表层泉水化学特征研究:以重庆酉阳泔溪花椒基地老泉为例[J],2018,46(6):524-533.
APA	邹晓岗.,杨琰.,徐刚.,田宁.,游贤慧.,...&曾朱周.(2018).岩溶槽谷石漠化治理区表层泉水化学特征研究:以重庆酉阳泔溪花椒基地老泉为例.地球与环境,46(6),524-533.
MLA	邹晓岗,et al."岩溶槽谷石漠化治理区表层泉水化学特征研究:以重庆酉阳泔溪花椒基地老泉为例".地球与环境 46.6(2018):524-533.