峰丛洼地表层岩溶动力系统季节变化规律

姜光辉; 郭芳; 曹建华; 游省易; 李恩香; 邓艳

峰丛洼地表层岩溶动力系统季节变化规律

姜光辉^{1, 2,},
郭芳^{1, 2},
曹建华^{1, 2},
游省易³,
李恩香⁴,
邓艳⁴

1.
国土资源部岩溶动力学开放研究实验室, 广西桂林 541004
2.
中国地质科学院岩溶地质研究所, 广西桂林 541004
3.
中国地质大学工程学院, 湖北武汉 430074
4.
广西师范大学生物系, 广西桂林 541004

基金项目:

国土资源部重点科技项目 2000208

科技部公益专项 2000164

详细信息

作者简介:
姜光辉(1977-), 男, 实习研究员, 2000年毕业于中国地质大学(武汉), 主要从事岩溶学、水文地质方面的研究.E-mail: jgh@karst.edu.cn

中图分类号: P641.134
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出版历程
- 收稿日期: 2002-10-16
- 刊出日期: 2003-05-25

Seasonal Change of Epi-Karst Dynamic System in Peak-Depression Area

JIANG Guang-hui^{1, 2
,},
GUO Fang^{1, 2},
CAO Jian-hua^{1, 2},
YOU Sheng-yi³,
LI En-xiang⁴,
DENG Yan⁴

1.
Karst Dynamics Laboratory, Ministry of Land and Resources, Guilin 541004, China
2.
Institute of Karst Geology, CAGS, Guilin 541004, China
3.
Enineering Faculty, China University of Geosciences, Wuhan 430074, China
4.
Department of Biology, Guangxi Normal University, Guilin 541004, China

摘要

摘要: 峰丛洼地表层岩溶动力系统与土壤CO₂密切相关.土壤CO₂体积分数变化受气温和降雨影响, 其季节变化特征表现为: 冬季的波谷、夏季的波峰交替出现, 秋季出现次波谷和次波峰.受降雨影响, 表层岩溶动力系统运行强度春、夏季较强, 秋、冬季较弱.从冬至夏, 在土壤CO₂逐渐增多时, 系统溶解、转移碳的能力也逐渐增强.在土壤CO₂和温度双重支配下, 系统由冬季的沉积趋势转为春、夏季的溶解趋势.
- 峰丛洼地 /
- 表层岩溶动力系统 /
- 土壤CO₂
Abstract: Epi-karst dynamic system is related closely with CO₂ content in soil. Temperature and rainfall dominate the seasonal change of CO₂ content in soil. The CO₂ content is low in winter when it is cold and dry while it is high in summer as it is hot and wet. There are a hypo-trough and a hypo-crest in autumn when there is a sudden increasing in rainfall. Epi-karst dynamic system is more active from spring to summer than from autumn to winter, because rainfall is focus in spring and summer. The system transfers more and more carbon with the increase of CO₂ content in soil from winter to summer. With the control of CO₂ content and temperature, the sedimentation-dissolution trend of the system changes from sedimentation trend to dissolution trend from winter to spring and summer.
- peak-cluster depression /
- epi-karst dynamic system /
- CO₂ in soi

HTML全文

图 1 试验场水文地质剖面

1.土壤覆被; 2.表层岩溶泉; 3.饱水带泉4.石灰岩

Fig. 1. Hydrogeological section of the experimental site

下载: 全尺寸图片幻灯片

图 2 土壤CO₂体积分数变化与气候的关系

a.土壤φ (CO₂) 月变化曲线; b.桂林月平均气温变化曲线; c.桂林岩溶动力系统野外监测站2001年降雨量月变化曲线; d.桂林月平均降雨量变化曲线

Fig. 2. Seasonal changes of climate (temperature and rainfall) and CO₂ volume fraction in soil

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图 3 表层岩溶泉CO₂体积分数、溶解碳和饱和指数与土壤CO₂体积分数相关变化

a, b, c.S25、S54、S55的CO₂体积分数和溶解碳与土壤CO₂体积分数相关变化; 1.土壤CO₂, 2.泉水CO₂, 3.溶解碳; d, e, f.S25、S54S55的方解石饱和指数(SIC) 与土壤CO₂体积分数相关变化

Fig. 3. Seasonal changes of CO₂ volume fraction, dissolved carbon and SIC of epi-karst spring and CO₂ volume fraction in soil

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