IMHE OpenIR  > 山地表生过程与生态调控重点实验室
亚热带农业小流域暴雨过程硝态氮迁移特征及水文示踪研究
Alternative TitleCharacteristics of Nitrate-N losses through runoff and hydrological tracing in subtropical agricultural catchments
王芮1,2; 唐家良1; 章熙锋1; 申东1; 翟龙波1,2; 朱波1
Corresponding Author唐家良
2016-08
Source Publication水利学报
ISSN0559-9350
Volume47Issue:8Pages:996-1016
Abstract
摘要:为揭示亚热带丘陵区农业小流域暴雨过程中硝态氮迁移规律及其主要水文输送途径,本研究通过对紫色土丘陵区典型农业小流域典型暴雨过程跨尺度(从3~1 236 hm2)连续监测,分析径流硝态氮迁移动态特征及其尺度效应,并对比δ18O 和硝态氮作为示踪剂的端元混合分析(EMMA)解析结果,探讨硝态氮作为暴雨过程水文示踪剂的可行性。结果表明:(1)两场暴雨事件中源头小流域苏荣小流域(含集镇污水)径流中硝态氮浓度最高,而到达
梯级小流域出口处(万安小流域)硝态氮浓度最低,林地来水的贡献是较大尺度小流域径流硝态氮浓度降低的主要原因,坡耕地壤中流补给可能是径流消退过程中硝态氮出现浓度峰值的主要原因。(2)EMMA 模型解析结果显示:δ18O与硝态氮均能示踪农业小流域径流消退期间壤中流补给过程;但硝态氮在受人居活动强烈影响子流域的示踪应用需谨慎。以农业为主的亚热带丘陵区小流域中,硝态氮具有同时作为环境效应指示剂和水文示踪剂的潜力,但其应用效果仍有待于进一步验证。
Other Abstract
In order to understand the hydrological pathways of nitrate-N in subtropical agricultural catchments,this study was carried out at a nested agricultural headwater catchment in Hilly area of purple soil. Rainfall,discharge,δ~(18)O,nitrate-N were monitored continuously in two storms. End member mixing analysis(EMMA) model was applied to quantify the contributions from different water sources. The results show that:(1) Surong catchment has the highest nitrate-N concentrations,while Wanan has the lowest nitrate-N, indicating that nitrate-N decreased with lager catchment size attribute to water dilution effect from other small watersheds which are dominated by woodland; (2) Subsurface flow from sloped croplands contributes to peak nitrate-N concentrations increased during the recession period of storm flow. The results of EMMA show that both δ~(18)O and nitrate-N successfully traced subsurface flow replenishment process during the flow recession period. But intense human activity might lead a certain deviation. In sum,nitrate-N has the potential to be environmental indicator and hydrologic tracer simultaneously during storm events for small agricultural catchments. But its application in more storm events at multiple sites remains to be further validated.
Keyword农业小流域 硝态氮 暴雨径流 紫色土丘陵区 水文示踪
Subject AreaX52
DOI10.13243/j.cnki.slxb.20151262
Indexed ByEI ; CSCD
Language中文
CSCD IDCSCD:5778239
Funding Organization国家自然科学基金项目(41371241) ; 科技部973课题(2012CB417101)
Accession numberAccession number:20164302945783
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17813
Collection山地表生过程与生态调控重点实验室
Affiliation1.中国科学院、水利部成都山地灾害与环境研究所
2.中国科学院大学
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
王芮,唐家良,章熙锋,等. 亚热带农业小流域暴雨过程硝态氮迁移特征及水文示踪研究[J]. 水利学报,2016,47(8):996-1016.
APA 王芮,唐家良,章熙锋,申东,翟龙波,&朱波.(2016).亚热带农业小流域暴雨过程硝态氮迁移特征及水文示踪研究.水利学报,47(8),996-1016.
MLA 王芮,et al."亚热带农业小流域暴雨过程硝态氮迁移特征及水文示踪研究".水利学报 47.8(2016):996-1016.
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