• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Science of the Total Environment >Data-driven analysis of nutrient inputs and transfers through nested catchments
【24h】

Data-driven analysis of nutrient inputs and transfers through nested catchments

机译：数据驱动的营养物质输入和嵌套流域转移的分析

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

A data-driven screening methodology is developed for estimating nutrient input and retention-delivery in catchments with measured water discharges and nutrient concentrations along the river network. The methodology is applied to the Sava River Catchment (SRC), a major transboundary catchment in southeast Europe, with seven monitoring stations along the main river, defining seven nested catchments and seven incremental subcatchments that are analysed and compared in this study. For the relatively large nested catchments (>40,000 km~2), characteristic regional values emerge for nutrient input per unit area of around 30 T/yr/km2 for dissolved inorganic nitrogen (DIN) and 2 T/yr/km~2 for total phosphorus (TP). For the smaller nested catchments and incremental subcatchments, corresponding values fluctuate and indicate hotspot areas with total nutrient inputs of 158 T/yr/km~2 for DIN and 13 T/yr/km~2 for TP. The delivered fraction of total nutrient input mass (termed delivery factor) and associated nutrient loads per area are scale-dependent, exhibiting power-law decay with increasing catchment area, with exponents of around 02-03 for DIN and 03-0.5 for TP. For the largest of the nested catchments in the SRC the delivery factor is around 0.08 for DIN and 0.03 for TP. Overall, the nutrient data for nested catchments within the SRC show consistency with previously reported data for multiple nested catchments within the Baltic Sea Drainage Basin, identifying close nutrient relationships to driving hydroclimatic conditions (runoff for nutrient loads) and socio-economic conditions (population density and farmland share for nutrient concentrations).
机译：开发了一种数据驱动的筛选方法，以估算沿河网的排水量和养分浓度，并估算流域的养分输入和保留量。该方法适用于萨瓦河集水区（SRC），这是东南欧的主要跨界集水区，在主要河流上有七个监测站，定义了七个嵌套集水区和七个增量子集水区，在本研究中进行了分析和比较。对于相对较大的嵌套流域（> 40,000 km〜2），溶解态氮（DIN）每单位面积养分输入的特征性区域价值约为30 T / yr / km2，总氮养分为2 T / yr / km〜2磷（TP）。对于较小的嵌套集水区和增量子集水区，相应的值会波动并指示热点区域，其中DIN总养分输入为158 T / yr / km〜2，TP总养分输入为13 T / yr / km〜2。营养素总输入量的输送比例（称为输送因子）和每个区域的相关营养素负荷与比例有关，随着集水面积的增加，幂律会衰减，DIN的指数约为02-03，TP的指数约为03-0.5。对于SRC中最大的嵌套集水区，DIN的输送因子约为0.08，TP的输送因子约为0.03。总体而言，SRC内嵌套流域的养分数据与波罗的海流域内多个嵌套流域的先前报告数据保持一致，确定了与驱动水文气候条件（养分负荷径流）和社会经济条件（人口密度）密切相关的养分关系。和农田分享营养成分）。

著录项

  • 来源
    《The Science of the Total Environment》 |2018年第1期|482-494|共13页
  • 作者

    Lea Levi; Vladimir Cvetkovic; Georgia Destouni;

  • 作者单位

    Department of Sustainable development, Environmental science and Engineering (SEED), Royal Institute of Technology (KTH), Stockholm, Sweden,Department of Physical Geography and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden,Department of Applied Hydraulics, Faculty of Civil Engineering, Architecture and Geodesy, University of Split, Split, Croatia;

    Department of Sustainable development, Environmental science and Engineering (SEED), Royal Institute of Technology (KTH), Stockholm, Sweden;

    Department of Physical Geography and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden;

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

    Dissolved inorganic nitrogen; Total phosphorus; Nutrient input; Nutrient retention-delivery; Nutrient load; Sava River Catchment;

    机译：溶解的无机氮;总磷营养输入;营养素的保持传递;营养负荷;萨瓦河集水区;

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