基于水化学与氮氧同位素的喀斯特山区水体硝酸盐来源示踪与估算——以平寨水库为例

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (2638 KB) HTML (0 KB)
输出: BibTeX | EndNote (RIS)

摘要平寨水库地处喀斯特山区，是贵州省重要的灌溉和饮用水库之一，其水环境质量深刻影响着居民生产生活.以平寨水库为研究对象，采用水化学分析方法、氮氧双同位素技术结合稳定同位素混合模型（Bayesian mixing model， MixSIAR），定量识别研究区水体硝酸盐各污染源的贡献率.结果表明：河流及库区水体溶解无机氮主要以硝态氮形态存在，时间上表现为平水期>丰水期>枯水期，空间上呈现出各河流上游浓度差异较大，下游与库区浓度接近，坝前丰水期的硝酸盐浓度较高的特征；研究区水体硝酸盐的转化主要以硝化作用为主，枯水期和平水期其主要来源是生活污水与牲畜粪便和土壤有机氮，丰水期主要为化学肥料；各时期硝酸盐来源中，整体表现为库区的生活污水与牲畜粪便的贡献率高于河流，土壤有机氮与化学肥料的贡献率低于河流. 从生活污水与牲畜粪便贡献率来看，其值在河流、库区枯水期分别为59.3%、70.8%，在河流、库区平水期分别为58.3%、72.6%，丰水期值较小.从土壤有机氮贡献率和化学肥料贡献率来看，丰水期贡献率均高于枯水期和平水期.河流、库区丰水期源自土壤有机氮的贡献率分别为35.1%、32.8%，源自化学肥料的贡献率分别为36.4%、30.7%.平寨水库水环境质量保护应重点加强各城镇与农村居民生活污水排放的管控，纳雍河流域要减少生活污水的排放，提高污水集中处理能力.此外，环境保护还要提升各流域农业活动污染的防治，合理处置各流域散户养殖畜禽粪便的排泄和堆放，避免污染物进入水体造成污染，为居民饮用水安全与生态保护提供保障.

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王艳碧
	周忠发
	孔杰
	王翠
	邹艳
	张富强
	李梨

关键词 ：喀斯特山区, 硝酸盐来源, 水化学特征, 氮氧同位素, MixSIAR模型, 平寨水库

Abstract：Pingzhai reservoir is located in the karst mountainous area. It is one of the important irrigation and drinking water reservoirs in Guizhou province, the water environment quality has a profound impact on the production and life of residents. Taking Pingzhai reservoir as the research object, this essay adopted hydrochemical analysis method, nitrogen and oxygen dual isotope technology combined with MixSIAR model to quantitatively identify the contribution rate of each pollution sources of nitrate in the water body of the study area. The results showed that:(1)Dissolved inorganic nitrogen in rivers and reservoir water bodies mainly exists in the form of nitrate nitrogen, which is manifested in time as flat season>wet season>dry season. In space, there is a significant difference in concentration in the upstream of each river, while the concentration in the downstream is close to that in the reservoir area. The nitrate concentration in the wet season before the dam is relatively high.(2)The conversion of nitrate in the water body of the research area is mainly through nitrification. The main sources are domestic sewage, livestock manure, and soil organic nitrogen during the dry and flat seasons, while chemical fertilizers are the mail sources during the wet season. (3) In terms of nitrate sources, the contribution rates of domestic sewage and livestock manure in the reservoir area were higher than that of rivers, and the contribution rates of soil organic nitrogen and chemical fertilizer were lower than that of rivers. In terms of contribution rates of domestic sewage and livestock manure, the numbers are 59.3% and 70.8% in the dry season of rivers and reservoirs respectively, and 58.3% and 72.6% respectively during the normal water period of rivers and reservoirs. And the number is quite small during wet season. From the perspective of soil organic nitrogen contribution rate and chemical fertilizer contribution rate, the contribution rate during the wet season is higher than that during the dry and flat season. The contribution rates of soil organic nitrogen from rivers and reservoirs during the wet season are 35.1% and 32.8% respectively, and the contribution rates from chemical fertilizers are 36.4% and 30.7% respectively. The protection of water environment quality in Pingzhai Reservoir should focus on strengthening the control of domestic sewage discharge for urban and rural residents, especially the reduction of the discharge of domestic sewage and improvement of centralized sewage treatment of the Nayong River basin. Besides, in order to protect the water environment, it is necessary to enhance the prevention and control of agricultural pollution in various watersheds, reasonably dispose of the discharge and stacking of livestock and poultry manure from individual livestock breeding in each watershed, avoid pollutants from entering the water body and causing pollution, and provide guarantees for the safety of drinking water and ecological protection of residents.

Key words： karst mountainous area nitrate source hydrochemical characteristics Nitrogen and oxygen isotope MixSIAR model Pingzhai Reservoir

收稿日期: 2023-02-27

PACS:

X142

基金资助:国家自然科学地区基金项目（4216148）；贵州省科技计划（黔科合基础[2020]1Y154）

通讯作者: 周忠发,教授,fa6897@163.com E-mail: fa6897@163.com

作者简介: 王艳碧(1998-),女,贵州毕节人,贵州师范大学硕士研究生,主要研究方向为地理信息系统与生态环境治理.2529616577@qq.com.

引用本文:

王艳碧, 周忠发, 孔杰, 王翠, 邹艳, 张富强, 李梨. 基于水化学与氮氧同位素的喀斯特山区水体硝酸盐来源示踪与估算——以平寨水库为例[J]. 中国环境科学, 2023, 43(10): 5265-5276. WANG Yan-bi, ZHOU Zhong-fa, KONG Jie, WANG Cui, ZOU Yan, ZHANG Fu-qiang, LI Li. Tracing and estimation of nitrate sources based on hydrochemistry and nitrogen and oxygen isotopes in karst mountainous water: A case study of the Pingzhai reservoir. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5265-5276.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2023/V43/I10/5265

[1]	袁宏颖,杨树青,张万峰,等.河套灌区浅层地下水NO3--N时空变化及驱动因素[J]. 环境科学, 2022,43(4):1898-1907. Yuan H Y, Yang S Q, Zhang W F, et al. Temporal and spatial variation characteristics and driving factors of nitrogen of shallow groundwater in Hetao irrigation district[J]. Environmental Science, 2022,43(4):1898-1907.
[2]	齐冉,徐菲菲,杨帆,等.木沥河流域氮素及其污染源解析[J]. 环境科学, 2020,41(7):3165-3174. Qi R, Xu F F, Yang F, et al. Analysis of nitrogen and its pollution sources in the Muli river basin[J]. Environmental Science, 2020, 41(7):3165-3174.
[3]	Yin C, Yang H Q, Wang J F, et al. Combined use of stable nitrogen and oxygen isotopes to constrain the nitrate sources in a karst lake[J]. Agriculture, Ecosystems and Environment, 2020,303:1-9.
[4]	Zhao Y, Dang J H, Wang F. Sources of nitrogen pollution in upstream of Fenhe River Reservoir based on the nitrogen and oxygen stable isotope[J]. Journal of Chemistry, 2020,2020,(2):1-8.
[5]	任坤,潘晓东,彭聪,等.氮氧同位素和水化学解析昭通盆地地下水硝酸盐来源及对环境的影响[J]. 中国地质, 2022,49(2):409-419. Ren K, Pan X D, Peng C, et al. Identification of nitrate of groundwater in the Zhaotong basin using hydrochemistry, nitrogen and oxygen isotopes and its impact on the environment[J]. Geology in China, 2022,49(2):409-419.
[6]	Kou X Y, Ding J J, Li Y Z, et al. Tracing nitrate sources in the groundwater of an intensive agricultural region[J]. Agricultural Water Management, 2021,250:1-10.
[7]	张鑫,张妍,毕直磊,等.中国地表水硝酸盐分布及其来源分析[J]. 环境科学, 2020,41(4):1594-1606. Zhang X, Zhang Y, Bi Z L, et al. Distribution and source analysis of Nitrate in surface waters of China[J]. Environmental Science, 2020, 41(4):1594-1606.
[8]	钱睿智,陈静,王永东.基于氮同位素的通扬运河污染负荷解析[J]. 水资源保护, 2021,37(4):121-126. Qian R Z, Chen J, Wang Y D. Analysis of pollution load of Tongyang Canel based on nitrogen isotope[J]. Water Resources Protection, 2021,37(4):121-126.
[9]	路路,戴尔阜,程千钉,等.三江平原水田排水期氮素输出特征研究[J]. 地理研究, 2020,39(2):473-482. Lu L, Dai E F, Cheng Q D, et al. The characteristics of nitrogen output during the paddy field drainage period[J]. Geographical Research, 2020,39(2):473-482.
[10]	Veale N, Visser A, Esser B, et al. Nitrogen cycle dynamics revealed through δ18O-NO3− analysis in California Groundwater[J]. geosciences, 2019,9(95):1-15.
[11]	邢子康,余钟波,衣鹏,等.基于氮氧同位素解析不同降雨条件下硝酸盐污染源[J]. 环境科学, 2021,42(12):5796-5803. Xing Z K. Yu Z B, Yi P, et al. Analysis of nitrate sources under diffferent rainfall conditions based on δ15N and δ18O values[J]. Environmental Science, Environmental Science, 2020,42(12):5796-5803.
[12]	崔玉环,王杰,郝泷,等.长江中下游平原升金湖流域硝酸盐来源解析及其不确定性[J]. 湖泊科学, 2021,33(2):474-482. Cui Y H, Wang J, Hao L. et al. The contribution rates of nitrate sources and their uncertainties in Shengjin Lake Basin, middle and lower reaches of the Yangtze River Plain[J]. Journal of Lake Sciences, 2021, 33(2):474-482.
[13]	Yu L, Zheng T Y, Zheng X L, et al. Nitrate source apportionment in groundwater using Bayesian isotope mixing model based on nitrogen isotope fractionation[J]. Science of The Total Environment, 2020, 718(C):137242.
[14]	李严,曹明达,靳孟贵,等.湖北泉水河流域水化学特征和硝酸盐来源示踪[J]. 地球科学, 2020,45(3):1061-1070. Li Y, Cao M D, Jin M G, et al. Hydrochemical characteristics and tracing of nitrate sources in Quanshui river catchment, Hubei province[J]. Earth Science, 2020,45(3):1061-1070.
[15]	郭树芳,陈安强,习斌,等.澜沧江水系氮磷污染及硝酸盐来源解析[J]. 环境科学, 2022,43(12):5491-5498. Guo S F, Chen A Q, Xi B, et al. Analysis of nitrogen and phosphorus pollution and nitrogen sources in the Lancang river[J]. Environmental Science, 2022,43(12):5491-5498.
[16]	Soto D X, Koehler G, Wassenaar L I, et al. Spatio-temporal variation of nitrate sources to Lake Winnipeg using N and O isotope (δ 15N, δ 18O) analyses[J]. Science of The Total Environment, 2019,647:486-493.
[17]	李冬丽,贺海波.西南喀斯特地区水体硝态氮时空分布特征及其来源解析[J]. 地球化学, 2022,51(1):34-45. Li D L, He H B. Spatial-temporal distribution and sources of nitrate-nitrogen in karst water, Southwest China[J]. Geochimica, 2022,51(1):34-45.
[18]	王雨旸,杨平恒,张洁茹.重庆市老龙洞地下河流域硝酸盐来源和生物地球化学过程的识别[J]. 环境科学, 2022,43(10):4470-4479. Wang Y Y, Yang P H, Zhang J R. Sources and biogeochemical processes of nitrate in the Laolongdong Karst underground river basin, Chongqing[J]. Environmental Science, 2022,43(10):4470-4479.
[19]	李耕,韩志伟,申春华,等.典型岩溶小流域水体中硝酸盐分布特征及成因:以普定后寨河流域为例[J]. 地球科学, 2019,44(9):2899-2908. Li G, Han Z W, Shen C H, et al. Distribution Characteristics and causes of nitrate in water of typical small karst catchment:a case of Houzhai river catchment[J]. Earth Science, 2019,44(9):2899-2908.
[20]	孔杰,周忠发,李永柳,等.喀斯特高原水库水体氮素分布特征研究:以平寨水库为例[J]. 环境科学与技术, 2021,44(11):116-124. Kong J, Zhou Z F, Li Y L, et al. Study on the characteristics of nitrogen distribution in water bodies of karst plateau reservoirs:taking Pingzhai reservoir as an example[J]. Environmental Science & Technology, 2021,44(11):116-124.
[21]	郭亚文,田富强,胡宏昌,等.南小河沟流域地表水和地下水的稳定同位素和水化学特征及其指示意义[J]. 环境科学, 2020,41(2):682-690. Guo Y W, Tian F Q, Hu H C, et al. Characteristics and significance of stable isotopes and hydrochemistry in surface water and groundwater in Nanxiaohegou Basin[J]. Environmental Science, 2020,41(2):682-690.
[22]	肖春艳,刘怡凡,赵同谦,等.小浪底水库水沙调控期滨河湿地地下水与河水转化关系[J]. 环境科学, 2022,43(12):5499-5508. Xiao C Y, Liu Y F, Zhao T Q, et al. Transformation relationship of groundwater and river water in Riparian wetland during water and sediment regulation of Xiaolangdi reservoir in Yellow river[J]. Environmental Science, 2022,43(12):5499-5508.
[23]	李霄,王晓光,柴璐,等.沉积盆地地下水无机氮来源示踪及其演化模式[J]. 中国环境科学, 2021,41(4):1856-1867. Li X, Wang X G Cha L, et al. Sources tracing and evolution model of inorganic nitrogen of groundwater in sedimentary basin[J]. China Environmental Science, 2021,41(4):1856-1867.
[24]	Huang X, Jin M G, Ma B, et al. Identifying nitrate sources and transformation in groundwater in a large subtropical basin under a framework of groundwater flow systems[J]. Journal of Hydrology, 2022,19(13):3247-3261.
[25]	Xue D M, Botte J, Baets B, et al. Present limitations and future prospects of stable isotope methods for nitrate source identification in surface-and groundwater[J]. Water Research, 2008,43(5):1159-1170.
[26]	Kendall C, Elliott E, Wankel S. Tracing anthropogenic inputs of nitrogen to ecosystems[M]. Oxford (OXF):Blackwell, 2007.
[27]	金赞芳,张文辽,郑奇,等.氮氧同位素联合稳定同位素模型解析水源地氮源[J]. 环境科学, 2018,39(5):2039-2047. Jin Z F, Zhang W L, Zheng Q, et al. Contribution of nitrogen sources in water sources by combining nitrogen and oxygen isotopes and SIAR[J]. Environmental Science, 2018,39(5):2039-2047.
[28]	王雨旸.重庆市老龙洞地下河流域硝酸盐来源和迁移转换[D]. 重庆:西南大学, 2022. Wang Y Y. Source, migration, and transformation of nitrate in the Laolongdong karst underground river basin, Chongqing[D]. Chongqing:Southwest University, 2022.
[29]	Ju X, Xing G, Chen X, et al. Reducing environmental risk by improving N management in intensive Chinese agricultural systems[J]. Proceedings of the National Academy of Sciences of the United States of America, 2009,106(9):3041-3046.
[30]	Han C, Zheng B, Qin Y, et al. Analysis of phosphorus import characteristics of the upstream input rivers of Three Gorges Reservoir[J]. Environmental Earth Sciences, 2016,75:1-10.
[31]	Heaton T. Isotopic studies of nitrogen pollution in the hydrosphere and atmosphere:A review[J]. Chemical Geology, 1986,59(1):87-102.
[32]	金赞芳,张文辽,郑奇,等.氮氧同位素联合稳定同位素模型解析水源地氮源[J]. 环境科学, 2018,39(5):2039-2047. Jin Z F, Zhang W L, Zheng Q, et al. Contribution of nitrogen sources in water by combining nitrogen and oxygen isotopes and SIAR[J]. Environmental Science, 2018,39(5):2039-2047.
[33]	寇馨月,丁军军,李玉中,等.青岛市农区地下水硝态氮污染来源解析[J]. 环境科学, 2021,42(7):3232-3241. Kou X Y, Ding J J, Li Y Z, et al. Identifying the sources of groundwater NO3--Nin Agricultural Region of Qingdao[J]. Environmental Science, 2021,42(7):3232-3241.
[34]	Zhang Y, Shi P, Song J X, et al. Application of Nitrogen and Oxygen Isotopes for Source and Fate Identification of Nitrate Pollution in Surface Water:A Review[J]. Applied Sciences, 2018:2-17.
[35]	Chen F J, Lao Q B, Zhang S W, et al. Nitrate sources and biogeochemical processes identified using nitrogen and oxygen isotopes on the eastern coast of Hainan Island[J]. Continental Shelf Research, 2020,207:2-9.
[36]	傅雪梅,孙源媛,苏婧,等.基于水化学和氮氧双同位素的地下水硝酸盐源解析[J]. 中国环境科学, 2019,39(9):3951-3958. Fu X M, Sun Y Y, Su J, et al. Source of nitrate in groundwater based on hydrochemical and dual stable isotopes[J]. China Environmental Science, 2019,39(9):3951-3958.
[37]	Li Y L, Li L X, Sun W, et al. Nitrate sources and transformations along a mountain-to-plain gradient in the Taizi River basin in Northeast China[J]. Environmental Sciences and Pollution Research, 2021:1-14.
[38]	路路,戴尔阜,程千钉,等.基于水环境化学及稳定同位素联合示踪的土地利用类型对地下水体氮素归趋影响[J]. 地理学报, 2019, 74(9):1878-1889. Lu L, Dai E F, Cheng Q D, et al. The sources and fate of nitrogen in groundwater under different land use types:Stable isotope combined with a hydrochemical approach[J]. Acta Geographica Sinica, 2019, 74(9):1878-1889.
[39]	江南,周明华,李红,等.长江上游典型山地农业小流域浅层地下水硝态氮时空变异特征及影响因素[J]. 环境科学, 2020,41(10):4539-4546. Jiang N, Zhou M H, Li H, et al. Spatial-temporal variations and the regulators of nitrate status in shallow groundwater of the typical mountainous agricultural watershed in the upper rearches of Yangtze river[J]. Environmental Science, 2020,41(10):4539-4546.
[40]	张勇荣.基于空间量化模型的人类活动强度对喀斯特筑坝河流水质影响研究[D]. 贵阳:贵州师范大学, 2021. Zhang Y R. Effects of intensity of human activities on water quality of river of karst damming based on the spatial quantitative model[D]. Guiyang:Guizhou Normal University, 2021.
[41]	殷超,杨海全,陈敬安,等.基于水化学和氮氧同位素的贵州草海丰水期水体硝酸盐来源辨析[J]. 湖泊科学, 2020,32(4):989-998. Yin C, Yang H Q, Chen J A, et al. Tracing nitrate sources with dual isotopes and hydrochemical characteristics during wet season in lake Caohai, Guizhou province[J]. Journal of Lake Sciences, 2020,32(4):989-998. 致谢:本实验的样本指标测定由中国科学院地球化学研究所环境地球化学国家重点实验室和自然资源部第三海洋研究所协助完成,在此表示感谢.