PANG Zheng,WANG Tianyang,LI Fengquan,et al.Cave Water Hydrogeochemical Characteristics of Jinhua North Mountain Caves and Its Climate Implications[J].Research of Soil and Water Conservation,2016,23(05):332-337,342.
金华北山洞穴水地球化学变化特征及气候指示意义
- Title:
- Cave Water Hydrogeochemical Characteristics of Jinhua North Mountain Caves and Its Climate Implications
- Keywords:
- cave water; ion concentration; element ratios; climate implications
- 分类号:
- P641
- 摘要:
- 为揭示洞穴水地球化学变化特征及其气候指示意义，从2014年5月到2015年4月对金华北山双龙洞和二仙洞洞穴水进行了连续12个月的观测分析，并结合当地气温和降雨数据，得到以下结果：（1）由于受上覆岩土作用、植被、运移路径等因素的影响，不同滴水点的离子浓度变化有所差异，常年性滴水点（除Ca2+外）阳离子平均浓度均大于季节性滴水点、瀑布水和池水；（2）金华北山洞穴水的Ca2+，Mg2+，Ba2+，Sr2+浓度变化具有明显的季节变化特征，总体上呈现出雨季高、旱季低的特点，5—8月和次年1—4月随着降雨量的增多而升高，9—12月由于外界降雨少而处于较高的值，外界干湿是影响阳离子浓度变化的主要因素；（3）洞穴水中Mg/Ca比值对外界干湿有指示意义，但也受气温的影响；而Sr/Ca，Ba/Ca比值除了受降雨影响，还受其他因素的影响。
- Abstract:
- In order to reveal the geochemical characteristics of cave waters and its climate implication, we have monitored cave waters in Jinhua Beishan Mountain caves from May 2014 to April 2015. Combining with the local data of temperature and precipitation, we got the following conclusions. (1) Affected by overlying rock, vegetation, flow path and other factors, different drip points have different ion concentrations, ion concentrations (except Ca2+) of perennial drip point were higher than the seasonal average dripping point, waterfall and pond. (2) Trace element ion concentrations of cave water in Jinhua North Mountain caves showed seasonal variation characteristics that the ion concentrations were low in dry season, were high in rainy season, and increased with the precipitation from May to August and the following year from January to May, keeping the high values from September to December due to the decrease of outside rainfall, dry or wet condition outside is the main factor affecting ion concentration. (3) Mg/Ca ratio of cave water implicates the wet or dry condition outside, but also it is affected by temperature. The ratios of Sr/Ca and Ba/Ca were not only affected by the precipitation, but also were affected by the interference of other geological and hydrological factors.
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备注/Memo
收稿日期:2015-09-18;改回日期:2015-10-14。
基金项目:浙江省自然科学基金“金华北山溶洞群洞穴滴水的气候信息指示”（LY16D010001）；国家自然科学基金面上项目“中国南方晚第四纪风尘沉积的物质联系”（41071002），“基于BHQ岩芯的钱塘江中下游全新世环境重建研究”（41371206）
作者简介:庞征(1990-),男,河南南阳人,硕士研究生,研究方向为环境演变。E-mail:1067509423@qq.com
通讯作者:王天阳(1977-),女,吉林长春人,副教授,主要从事环境变迁和水环境研究。E-mail:lygl59@zjnu.cn