A modification of the Regional Nutrient Management model (ReNuMa) to identify long-term changes in riverine nitrogen sources
A modification of the Regional Nutrient Management model (ReNuMa) to identify long-term changes in riverine nitrogen sources
复制标题
区域养分管理模型 (ReNuMa) 的修改，以确定河流氮源的长期变化
DOI：
10.1016/j.jhydrol.2018.03.068
复制
发表时间：
2018-06
影响因子：
6.4
通讯作者：
Chen Dingjiang
中科院分区：
文献类型：
--
作者：
Hu Minpeng;Liu Yanmei;Wang Jiahui;Dahlgren R;y A;Chen Dingjiang
源解析对于指导制定有效的流域氮(N)污染控制措施至关重要。ReNuMa(区域养分管理)模型是一种半经验、半过程、数据要求不高的模型，已被广泛应用于河流氮源解析。然而，ReNuMa模型忽略了大气N沉积速率的时间变化和N淋失滞后效应，在处理长期N动态方面存在局限性。这项工作修改了ReNuMa模型，修改了源代码，允许大气N沉积的年度变化，并将N淋失滞后效应纳入N的输送过程。通过对流域年度单项氮源输入与河流氮素输出的相关分析，确定了适宜的氮素淋失滞后时间。通过对中国东部永安流域31年(1980-2010年)水质记录的分析，验证了修正后的热努玛模型的准确性。这些修正大大提高了修正的RenuMa模型预测河流N负荷的精度(纳什-萨克利夫系数增加了∼0.2%)。修正后的模型明确了不同氮源(点源与非点源、地表径流与地下水)对河流氮素负荷贡献的年度和季节变化，以及流域人为氮素输入的去向。模型的模拟结果与先前模拟或观测到的滞后时间长度、枯水期河水氯和硝酸盐浓度的变化以及该流域农业土壤有效氮水平的变化相一致。修正后的ReNuMa模型适用于解决河流氮源的长期变化，为决策者提供指导流域N污染控制策略的关键信息。
Source apportionment is critical for guiding development of efficient watershed nitrogen (N) pollution control measures. The ReNuMa (Regional Nutrient Management) model, a semi-empirical, semi-process-oriented model with modest data requirements, has been widely used for riverine N source apportionment. However, the ReNuMa model contains limitations for addressing long-term N dynamics by ignoring temporal changes in atmospheric N deposition rates and N-leaching lag effects. This work modified the ReNuMa model by revising the source code to allow yearly changes in atmospheric N deposition and incorporation of N-leaching lag effects into N transport processes. The appropriate N-leaching lag time was determined from cross-correlation analysis between annual watershed individual N source inputs and riverine N export. Accuracy of the modified ReNuMa model was demonstrated through analysis of a 31-year water quality record (1980–2010) from the Yongan watershed in eastern China. The revisions considerably improved the accuracy (Nash-Sutcliff coefficient increased by ∼0.2) of the modified ReNuMa model for predicting riverine N loads. The modified model explicitly identified annual and seasonal changes in contributions of various N sources (i.e., point vs. nonpoint source, surface runoff vs. groundwater) to riverine N loads as well as the fate of watershed anthropogenic N inputs. Model results were consistent with previously modeled or observed lag time length as well as changes in riverine chloride and nitrate concentrations during the low-flow regime and available N levels in agricultural soils of this watershed. The modified ReNuMa model is applicable for addressing long-term changes in riverine N sources, providing decision-makers with critical information for guiding watershed N pollution control strategies.
登录
查看更多内容
用于表征遗留人为氮从流域到河流的时间动态输出的滞后变量模型
影响因子：
5.8
作者：
Dingjiang Chen;Yi Guo;Minpeng Hu;R;y A. Dahlgren
通讯作者：
y A. Dahlgren
影响因子：
3.7
作者：
Sheng W;Yu G;Fang H;Jiang C;Yan J;Zhou M
通讯作者：
Zhou M
影响因子：
5.2
作者：
K. Meter;N. Basu;P. Cappellen
通讯作者：
K. Meter;N. Basu;P. Cappellen
影响因子：
3.3
作者：
Chen, Chung-Chi;Gong, Gwo-Ching;Shiah, Fuh-Kwo
通讯作者：
Shiah, Fuh-Kwo
影响因子：
8.7
作者：
Jian Sha;Min Liu;Dong Wang;D. Swaney;Yuqiu Wang
通讯作者：
Jian Sha;Min Liu;Dong Wang;D. Swaney;Yuqiu Wang