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    缺土的板寨原始森林区岩溶地下河系统的水—碳动态特征

    曾成 赵敏 杨睿 刘再华 冉景丞 熊志斌

    曾成, 赵敏, 杨睿, 刘再华, 冉景丞, 熊志斌, 2012. 缺土的板寨原始森林区岩溶地下河系统的水—碳动态特征. 地球科学, 37(2): 253-262. doi: 10.3799/dqkx.2012.026
    引用本文: 曾成, 赵敏, 杨睿, 刘再华, 冉景丞, 熊志斌, 2012. 缺土的板寨原始森林区岩溶地下河系统的水—碳动态特征. 地球科学, 37(2): 253-262. doi: 10.3799/dqkx.2012.026
    ZENG Cheng, ZHAO Min, YANG Rui, LIU Zai-hua, RAN Jing-cheng, XIONG Zhi-bin, 2012. Characteristics of Water-Carbon Regime of Banzhai Karst Subterranean Stream System Covered by Virgin Forest in Soil Shortage Environment. Earth Science, 37(2): 253-262. doi: 10.3799/dqkx.2012.026
    Citation: ZENG Cheng, ZHAO Min, YANG Rui, LIU Zai-hua, RAN Jing-cheng, XIONG Zhi-bin, 2012. Characteristics of Water-Carbon Regime of Banzhai Karst Subterranean Stream System Covered by Virgin Forest in Soil Shortage Environment. Earth Science, 37(2): 253-262. doi: 10.3799/dqkx.2012.026

    缺土的板寨原始森林区岩溶地下河系统的水—碳动态特征

    doi: 10.3799/dqkx.2012.026
    基金项目: 

    中国科学院百人计划 2006-067

    中国科学院战略性科技先导专项重大课题 XDA05070400

    国家自然科学基金项目 41003056

    中国地质调查局地质调查工作项目 水[2010]矿评03-07-02

    详细信息
      作者简介:

      曾成(1979-), 男, 助理研究员, 研究方向为岩溶生态水文地质学与岩溶作用碳循环

      通讯作者:

      刘再华, E-mail: liuzaihua@vip.gyig.ac.cn

    • 中图分类号: X143

    Characteristics of Water-Carbon Regime of Banzhai Karst Subterranean Stream System Covered by Virgin Forest in Soil Shortage Environment

    • 摘要: 利用水文水化学自动记录仪, 对缺土的板寨原始森林区岩溶地下河系统径流排泄点进行了3个水文年(2007-01—2010-06)的自动监测, 运用水均衡计算、岩溶水流量衰减分析和H、O稳定同位素等方法, 对该地下河系统径流排泄点的水—碳动态进行了研究.结果表明: (1)原始森林的蒸散发异常强烈, 入渗系数低, 地下河产流少; (2)在缺乏土壤盖层的条件下, 即使是原始森林, 其水文(Q)、水化学(HCO3-浓度)调控能力仍然有限, 因而岩溶作用强度和碳汇能力较低.这些特征反映出土壤在水资源和碳循环调控中的重要作用.

       

    • 图  1  板寨岩溶地下河系统水文地质图

      1.洼地边界;2.落水洞;3.岩溶泉;4.地下水流向;5.岩层产状;6.断层;7.地下河(实线为实测,虚线为推测)

      Fig.  1.  Sketch hydrogeological map of Banzhai Karst Subterranean Stream

      图  2  板寨岩溶地下河系统土地利用分布情况

      Fig.  2.  Sketch land use map of Banzhai karst subterranean stream system

      图  3  板寨地下河出口复合堰前视

      Fig.  3.  The front view of the compound weir of Banzhai subterranean river

      图  4  板寨岩溶地下河系统水文水化学季节变化

      Fig.  4.  Seasonal hydrochemical variations of Banzhai karst subterranean stream system

      图  5  板寨岩溶地下河系统2008年11月~2008年12月水文水化学过程线

      Fig.  5.  Hydro-chemical graph of Banzhai karst subterranean stream during Nov-Dec, 2008

      图  6  板寨岩溶地下河2008年流量衰减曲线

      Fig.  6.  Graphs of discharge regression of Banzhai karst subterranean stream in 2008

      图  7  板寨岩溶地下河水与当地大气降水O-D同位素关系

      Fig.  7.  O-D isotopes of Banzhai karst water and local precipitation

      图  8  岩溶碳汇强度与流量、[HCO3-]关系

      Fig.  8.  Relationships among CSF, discharge and [HCO3-]

      表  1  板寨岩溶地下河系统岩溶水水文及物理化学参数统计

      Table  1.   Statistics on the hydrological and physicochemical parameters of Banzhai karst subterranean stream

      统计项目 统计样本个数 max min 平均值 标准偏差 变异系数
      流量(L/s) 70174 13334.24 3.00 180.93 881.47 4.87
      水温(℃) 57102 19.44 15.94 18.36 0.62 0.03
      pH值 57102 9.16 7.22 7.70 0.22 0.03
      [HCO3-](mg/L) 57102 369.25 141.00 218.89 21.17 0.10
      SIC 57102 1.72 -0.37 0.34 0.21 -
      PCO2(Pa) 57102 1361.44 10.79 441.93 240.80 0.54
      岩溶碳汇强度(tCO2·km-2·a-1) 57102 1426.45 0.36 25.28 102.08 4.04
      注:统计时段为2008—2009年,这2年的降水总量为3 478mm,年平均降水量为1 739mm.
      下载: 导出CSV

      表  2  板寨岩溶地下河系统排泄流量衰减特征值

      Table  2.   Characteristic values of discharge regression of Banzhai karst subterranean stream

      亚动态 衰减系数(1/15min) 15min衰减率(%) 流量平均衰减速度(L/15min) 相应岩溶水储存量(m3) 亚储存量所占比例(%)
      1 0.02353 2.38 50.8346 303754.78 66.28
      2 0.001452 0.16 0.1166 118052.85 25.76
      3 0.000414 0.04 0.0016 36473.43 7.96
      下载: 导出CSV
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