• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Water resources research >Critical zone structure controls concentration-discharge relationships and solute generation in forested tropical montane watersheds
【24h】

Critical zone structure controls concentration-discharge relationships and solute generation in forested tropical montane watersheds

机译：临界区结构控制着森林热带山地流域的浓度-流量关系和溶质生成

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Concentration-discharge (C-Q) relationships are poorly known for tropical watersheds, even though the tropics contribute a disproportionate amount of solutes to the global ocean. The Luquillo Mountains in Puerto Rico offer an ideal environment to examine C-Q relationships across a heterogeneous tropical landscape. We use 10-30 years of weekly stream chemistry data across 10 watersheds to examine C-Q relationships for weathering products (SiO2(aq), Ca2+, Mg2+, and Na+) and biologically controlled solutes (dissolved organic carbon [DO[], dissolved organic nitrogen [DON], NH4+, NO3, Po-4(3), K, and SO42+). We analyze C-Q relationships using power law equations and a solute production model and use principal component analysis to test hypotheses regarding how the structure of the critical zone controls solute generation. Volcaniclastic watersheds had higher concentrations of weathering solutes and smaller tributaries were approximately threefold more efficient at generating these solutes than larger rivers. Lithology and vegetation explained a significant amount of variation in the theoretical maximum concentrations of weathering solutes (r(2) = 0.43-0.48) and in the C-Q relationships of PO43 (r(2) = 0.63) and SiO2(aq) (r(2) = 0.47). However, the direction and magnitude of these relationships varied. Across watersheds, various forms of N and P displayed variable C-Q relationships, while DOC was consistently enriched with increasing discharge. Results suggest that PO43 may be a useful indicator of watershed function. Relationships between C-Q and landscape characteristics indicate the extent to which the structure and function of the Critical zone controls watershed solute fluxes.
机译：尽管热带地区向全球海洋贡献了不成比例的溶质，但对于热带流域而言，浓度-流量（C-Q）关系鲜为人知。波多黎各的Luquillo山脉为考察跨异质热带景观的C-Q关系提供了理想的环境。我们使用10-30个流域的每周10-30年的流化学数据来检查风化产物（SiO2（aq），Ca2 +，Mg2 +和Na +）和生物控制的溶质（溶解有机碳[DO []，溶解有机氮）的CQ关系。 [DON]，NH4 +，NO3，Po-4（3），K和SO42 +）。我们使用幂律方程和溶质生成模型分析C-Q关系，并使用主成分分析来检验关于关键区域结构如何控制溶质生成的假设。火山碎屑流域的风化溶质浓度较高，较小的支流产生这些溶质的效率比大河流高出三倍。岩性和植被解释了风化溶质的理论最大浓度（r（2）= 0.43-0.48）以及PO43（r（2）= 0.63）和SiO2（aq）（r（ 2）= 0.47）。但是，这些关系的方向和大小不同。在整个流域中，各种形式的氮和磷表现出可变的C-Q关系，而DOC随着排放量的增加而不断丰富。结果表明PO43可能是分水岭功能的有用指标。 C-Q与景观特征之间的关系表明临界区的结构和功能控制流域溶质通量的程度。

著录项

  • 来源
    《Water resources research》 |2017年第7期|6279-6295|共17页
  • 作者

    Wymore Adam S.; Brereton Richard L.; Ibarra Daniel E.; Maher Kate; McDowell William H.;

  • 作者单位

    Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA;

    Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA;

    Stanford Univ, Dept Earth Syst Sci, Stanford, CA 94305 USA;

    Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA;

    Univ New Hampshire, Dept Nat Resources & Environm, Durham, NH 03824 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号