1988—2018年嘉陵江流域入河氮素时空演变特征及来源解析  

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

作　　者：张名瑶 文雯 钟泳林 吕明权[2] 高绣纺 ZHANG Ming-yao;WEN Wen;ZHONG Yong-lin;LYU Ming-quan;GAO Xiu-fang(College of Resources and Environment,Yangtze University,Wuhan 430000,China;Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400700,China)

机构地区：[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

出　　处：《湖北农业科学》2023年第3期141-148,229,共9页Hubei Agricultural Sciences

基　　金：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)。

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6.3×105t增加到10.1×105t;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。Based on the Global News-2 model,the inflow nitrogen load of Jialing River basin in 1988,1999,2007 and 2018 was cal⁃culated,and the nitrogen flux of hydrological stations in Jialing River basin was verified to analyze the temporal and spatial distribu⁃tion characteristics and sources of the inflow nitrogen were analyzed.The results showed that Global News-2 model simulated the in⁃flow nitrogen load of Jialing River basin well,and during 1988—2018,the inflow nitrogen load of Jialing River basin increased by 380000 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 ba⁃sin.The nitrogen contribution of the two basins accounted for about 70%;there was a large difference of nitrogen load in different coun⁃ties and cities and different land use types,and the nitrogen load values of cultivated land and residential areas were high;the chemi⁃cal fertilizer application was the primary source,contributing 31.6%~49.0%of nitrogen in the basin.

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 

分 类 号：X52[环境科学与工程—环境工程]