湖北农业科学 ›› 2023, Vol. 62 ›› Issue (3): 141-148.doi: 10.14088/j.cnki.issn0439-8114.2023.03.023

• 污染治理 • 上一篇    下一篇

1988—2018年嘉陵江流域入河氮素时空演变特征及来源解析

张名瑶1,2, 文雯1,2, 钟泳林2, 吕明权2, 高绣纺1   

  1. 1.长江大学资源与环境学院,武汉 430000;
    2.中国科学院重庆绿色智能技术研究院,重庆 400700
  • 收稿日期:2022-07-27 发布日期:2023-04-20
  • 通讯作者: 吕明权(1987-),男,副研究员,博士,硕士生导师,主要从事内陆水体碳氮循环研究,(电话)15683165529(电子信箱)lvmingquan@cigit.ac.cn。
  • 作者简介:张名瑶(1998-),女,山东德州人,在读硕士研究生,研究方向为流域面源污染,(电话)13020611103(电子信箱)13020611103@163.com
  • 基金资助:
    国家自然科学基金项目(42071242); 重庆市科技局项目(cstc2021jxj10091); 中央引导地方科技发展专项资金项目(2021000069)

Temporal and spatial evolution characteristics and source analysis of the inflow nitrogen of Jialing River basin from 1988 to 2018

ZHANG Ming-yao1,2, WEN Wen1,2, ZHONG Yong-lin2, LYU Ming-quan2, GAO Xiu-fang1   

  1. 1. College of Resources and Environment, Yangtze University, Wuhan 430000, China;
    2. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400700, China
  • Received:2022-07-27 Published:2023-04-20

摘要: 基于Global News-2模型,计算嘉陵江流域1988、1999、2007、2018年的入河氮素负荷量,并用嘉陵江流域水文站氮素通量进行验证,分析入河氮素的时空分布特征及来源。结果表明,Global News-2模型较好地模拟了嘉陵江流域的入河氮素负荷量,1988—2018年入河氮素负荷增加约38万t,由6.3×105 t增加到10.1×105 t;入河氮素负荷时空差异明显,受径流影响较大,涪江、渠江水系是嘉陵江流域氮素的主要来源地,两个流域的氮素贡献约占70%;不同县市、不同利用类型土地的氮素负荷差距较大,耕地和居住地的氮素负荷值高;化肥施用是首要来源,贡献了流域31.6%~49.0%的氮素。

关键词: 入河氮素负荷, Global News-2模型, 来源解析, 嘉陵江流域, 时空演变

Abstract: Based on the Global News-2 model, the inflow nitrogen load of Jialing River basin in 1988, 1999, 2007 and 2018 was calculated, and the nitrogen flux of hydrological stations in Jialing River basin was verified to analyze the temporal and spatial distribution characteristics and sources of the inflow nitrogen were analyzed. The results showed that Global News-2 model simulated the inflow nitrogen load of Jialing River basin well, and during 1988—2018, the inflow nitrogen load of Jialing River basin increased by 380 000 t, from 6.3×105 t to 10.1×105 t; the temporal and spatial variation of the inflow nitrogen load of Jialing River basin was obvious, which was greatly affected by runoff. The Fujiang and Qujiang River systems were the main sources of nitrogen in Jialing River basin. The nitrogen contribution of the two basins accounted for about 70%; there was a large difference of nitrogen load in different counties and cities and different land use types, and the nitrogen load values of cultivated land and residential areas were high; the chemical fertilizer application was the primary source, contributing 31.6%~49.0% of nitrogen in the basin.

Key words: inflow nitrogen load, Global News-2 model, source analysis, Jialing River basin, temporal and spatial evolution

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