...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Hydrological Processes >Seasonal controls of meltwater runoff chemistry and chemical weathering at Urumqi Glacier No.1 in central Asia
【24h】

Seasonal controls of meltwater runoff chemistry and chemical weathering at Urumqi Glacier No.1 in central Asia

机译：中亚乌鲁木齐一号冰川融水径流化学和化学风化的季节性控制

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

Temporal variation of runoff chemistry and its seasonal controls relating to chemical weathering processes and drainage system evolution were examined at Urumqi Glacier No.1 in Xinjiang, China, over a full melt season. The dominant ions in meltwater runoff are HCO3-, Ca2+, and SO42-; and Fe, Sr, and Al are dominant elements. Concentrations of major ions and some elements show periodic variations with seasons and negatively correlate with discharge, whereas other elements (e.g., Al, Ni, Cu, Zn, Cd, and Pb) show a random change, providing insights into the hydrological and physicochemical controls. HCO3- and Ca2+ are primarily derived from calcite, SO42- and Fe mainly come from pyrite, and Sr and Al principally originate from silicate. Hydrochemical fluxes of solutes exhibit strong seasonality but are positively related to discharge, suggesting an increasing release of solutes during higher flow conditions. Solute yields, cation denudation rate, and chemical weathering intensity observed at Urumqi Glacier No.1 are higher than those at most basins worldwide. This suggests that chemical weathering in central Asia may be stronger than at other glacial basins with similar specific discharge. Concentrations of some elements (e.g., Fe, Al, As, Pb, and Zn) are close to or exceed the guidelines for drinking water standards in meltwater-fed rivers. These rivers may face future challenges of water quality degradation, and relationships between changing flow and water quality conditions should be established soon, given that development of channelized flow is expected to be earlier over a melt season in a warming climate.
机译：在整个融化季节期间，在中国新疆的乌鲁木齐一号冰川考察了径流化学的时间变化及其与化学风化过程和排水系统演变有关的季节性控制。融水径流中的主要离子是HCO3-，Ca2 +和SO42-。 Fe，Sr和Al是主要元素。主要离子和某些元素的浓度随季节呈周期性变化，并与排放负相关，而其他元素（例如Al，Ni，Cu，Zn，Cd和Pb）则呈现随机变化，从而提供了对水文和物化控制的见解。 HCO3-和Ca2 +主要来源于方解石，SO42-和Fe主要来源于黄铁矿，而Sr和Al主要来源于硅酸盐。溶质的水化学通量表现出强烈的季节性，但与排放呈正相关，表明在较高流量条件下溶质的释放增加。在乌鲁木齐一号冰川观察到的溶质产量，阳离子剥蚀率和化学风化强度高于世界上大多数盆地。这表明中亚的化学风化可能比其他具有类似排放量的冰河盆地强。某些元素（例如，铁，铝，砷，铅和锌）的浓度接近或超过了融水喂养河流中饮用水标准的准则。这些河流可能面临水质退化的未来挑战，鉴于预计在温暖的气候中，融化季节中较早的渠道化水流的发展，应尽快建立变化的水流与水质状况之间的关系。

著录项

  • 来源
    《Hydrological Processes》 |2019年第26期|3258-3281|共24页
  • 作者

    Li Xiangying; Ding Yongjian; Han Tianding; Kang Shichang; Yu Zhongbo; Jing Zhefan;

  • 作者单位

    Hohai Univ Coll Hydrol & Water Resource State Key Lab Hydrol Water Resources & Hydraul En Nanjing 210098 Jiangsu Peoples R China|Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Peoples R China;

    Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Peoples R China|Univ Chinese Acad Sci Beijing Peoples R China;

    Chinese Acad Sci Northwest Inst Ecoenvironm & Resources State Key Lab Cryospher Sci Lanzhou 730000 Peoples R China;

    Hohai Univ Coll Hydrol & Water Resource State Key Lab Hydrol Water Resources & Hydraul En Nanjing 210098 Jiangsu Peoples R China;

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

    central Asia; chemical weathering; meltwater runoff; Urumqi Glacier No; 1; water quality;

    机译：中亚;化学风化融水径流乌鲁木齐冰川1;水质;

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