Contribution of baseflow nitrate export to non-point source pollution
Contribution of baseflow nitrate export to non-point source pollution
复制标题
基流硝酸盐输出对面源污染的贡献
DOI：
10.1007/s11430-016-5329-1
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发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
Lu Jun
中科院分区：
文献类型：
--
作者：
He ShengJia;Lu Jun
作为地下水中常见的氮污染物，硝酸盐污染已成为全球关注的重大问题。基流是硝酸盐迁移到溪流的主要水文路径之一，已被证实是地下水或地下水流受到硝酸盐严重污染的溪流水的主要硝酸盐来源。也就是说，即使通过地表径流排放的非点源（NPS）污染物得到了很好的管理，如果没有适当的基流管理，也可能无法实现水质的充分改善。本文综述了硝酸盐的主要来源、影响其输运的主要因素以及基流硝酸盐估算的方法，为今后的工作提出一些建议，包括：（1）充分考虑气候、形态和地质因素对基流衰退的影响，以获得更可靠和准确的基流分离； （2）尝试解决暴雨流期基流负荷确定的校准和验证问题； （3）开发一种简单、方便且具有一定物理性质的算法，可用于直接将不同地区的基流核动力源污染从总量中分离出来，以便在更大范围（例如全国范围）可靠估计基流核动力源污染； （4）改进现有NPS污染模型的地下水质量模拟模块，更好地模拟浅层含水层的生物地球化学过程； （5）采取“源头控制”、“过程拦截”和“末端修复”综合措施，有效防治核动力源硝酸盐污染，而不仅仅是严格控制地表径流养分流失。
As a common pollutant of nitrogen in groundwater, nitrate contamination has become a major concern worldwide. Baseflow, one of the dominant hydrological pathways for nitrate migration to streamflow, has been confirmed as a leading nitrate source for stream water where groundwater or subsurface flow contaminated heavily by nitrate. That is, sufficient improvements of water quality may not be attained without proper management for baseflow, even if non-point sources (NPS) pollutants discharged through surface runoff are being well managed. This article reviews the primary nitrate sources, the main factors affecting its transport, and the methodologies for baseflow nitrate estimation, to give some recommendations for future works, including: (1) giving sufficient consideration for the effects of climatological, morphological, and geological factors on baseflow recessions to obtain more reliable and accurate baseflow separation; (2) trying to solve calibration and validation problems for baseflow loads determining in storm flow period; (3) developing a simple and convenient algorithm with certain physics that can be used to separate baseflow NPS pollution from the total directly in different regions, for a reliable estimation of baseflow NPS pollution at larger scale (e.g., national scale); (4) improving groundwater quality simulation module of existing NPS pollution models to have a better simulation for biogeochemical processes in shallow aquifers; (5) taking integrated measures of “source control”, “process interception” and “end remediation” to prevent and control NPS nitrate pollution effectively, not just only the strict control of nutrients loss from surface runoff.
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影响因子：
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作者：
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