
粤港澳大湾区典型城镇化地区河流氮素的时空分布特征及源解析
黎曼姿, 朱爱萍, 王莹, 陈建耀, 梁作兵, 伍祺瑞, 田帝, 曾港, 赵良杰
热带地理 ›› 2022, Vol. 42 ›› Issue (2) : 318-327.
粤港澳大湾区典型城镇化地区河流氮素的时空分布特征及源解析
Spatiotemporal Characteristics and Sources of River Nitrogen in Typical Urbanized Areas in the Guangdong-Hong Kong-Macao Greater Bay Area
选取粤港澳大湾区典型城镇化地区广州市的流溪河—西航道—前航道为研究对象,分别于2020年7月和2021年1月开展野外调研采样活动,收集40个地表水水样样品,通过室内分析,利用水化学和同位素(δ 15N-
A typical urbanized area in the Guangdong-Hong Kong-Macao Greater Bay Area, Liuxi River-West Channel-North Channel in Guangzhou City, was used to reveal the impacts of rapid urbanization on riverine nutrients. Two field campaigns were implemented in both wet and dry season, e.g. July 2020 and January 2021. Forty surface water samples were collected to analyze indicators such as major ions and stable isotopes (δ 15N-
粤港澳大湾区 / 典型城镇化地区 / 流溪河 / 氮素 / 同位素 / 源解析 {{custom_keyword}} /
Guangdong-Hong Kong-Macao Greater Bay Area / typical urbanization area / Liuxi River / Nitrogen / isotope trace / source identification {{custom_keyword}} /
表1 研究区河水基本理化参数及水化学组成的统计特征Table 1 Statistical characteristics of basic physicochemical parameters and hydrochemical composition of river in study area |
参数 | 基本理化参数 | 离子质量浓度/(mg·L-1) | 营养盐浓度/(mg·L-1) | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
温度/℃ | pH | EC/ (μS·cm-1) | TDS/ (mg·L-1) | DO/ (mg·L-1) | ORP/ mv | | Cl- | | K+ | Na+ | Ca2+ | Mg2+ | | | | ||||
丰 水 期 | 最小值 | 27.2 | 6.5 | 33.3 | 37.1 | 2.09 | 72.0 | 30.5 | 1.22 | 2.74 | 1.7 | 2.35 | 5.49 | 0.66 | 1.27 | 0.52 | n.a. | ||
最大值 | 31.8 | 9 | 218.2 | 179 | 8.91 | 147.0 | 91.5 | 30.52 | 34.23 | 6.76 | 23.9 | 33.6 | 4.29 | 6.00 | 2.97 | 0.43 | |||
平均值 | 30 | 8.2 | 102.4 | 84.98 | 6.34 | 126.0 | 53.83 | 9.25 | 12.39 | 3.9 | 8.56 | 16.83 | 1.65 | 3.24 | 1.24 | 1.30 | |||
标准偏差 | 1.18 | 0.63 | 64.13 | 50.44 | 1.83 | 19.9 | 18.99 | 9.57 | 11.28 | 1.67 | 6.81 | 9.82 | 1.09 | 1.60 | 0.69 | 0.43 | |||
变异系数 | 0.04 | 0.08 | 0.63 | 0.59 | 0.29 | 0.2 | 0.35 | 1.03 | 0.91 | 0.43 | 0.8 | 0.58 | 0.66 | 0.49 | 0.13 | 2.00 | |||
枯 水 期 | 最小值 | 13.8 | 7.25 | 41.3 | 33.7 | 5.0 | 101.0 | 30.5 | 1.5 | 1.5 | 1.2 | 2.2 | 6.2 | 0.7 | 0.10 | 0.11 | n.a. | ||
最大值 | 18.8 | 8.31 | 490 | 3 538.3 | 11.3 | 161.0 | 140.3 | 2 101.7 | 278.9 | 40.3 | 857.0 | 71.5 | 106.0 | 6.30 | 6.54 | n.a. | |||
平均值 | 16.3 | 7.6 | 218.5 | 324.5 | 8.8 | 140.2 | 79.9 | 130.3 | 39.7 | 6.7 | 66.2 | 24.4 | 7.8 | 1.41 | 2.13 | n.a. | |||
标准偏差 | 1.33 | 0.25 | 166.23 | 766.3 | 1.8 | 17.9 | 40.60 | 465.0 | 65.1 | 8.4 | 187.6 | 17.4 | 23.2 | 1.30 | 2.04 | n.a. | |||
变异系数 | 0.08 | 0.03 | 0.76 | 2.4 | 0.2 | 0.1 | 0.51 | 3.6 | 1.6 | 1.3 | 2.8 | 0.7 | 3.0 | 0.92 | 0.22 | n.a. |
表2 研究区丰水期、枯水期 |
指标 | 丰水期 | 枯水期 | |||
---|---|---|---|---|---|
| Cl- | | Cl- | ||
样本量/个 | 20 | 20 | 20 | 20 | |
相关系数 | 0.673** | -0.288 |
图5 研究区丰水期硝酸盐氮氧双同位素(δ 15N- |
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黎曼姿:野外调查采样、实验分析、结果可视化、初稿撰写;
朱爱萍:野外调查采样、研究概念生成、研究资金获取、论文审阅与修订;
陈建耀:研究概念生成、研究资金获取、论文审阅与修订;
梁作兵:野外调查采样、论文审阅与修订;
王莹、伍祺瑞、田帝、曾港、赵良杰:野外调查采样。
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