Simulation of nitrogen dynamics in lowland polders using a new coupled modelling approach: Insights into management

	Simulation of nitrogen dynamics in lowland polders using a new coupled modelling approach: Insights into management
	Yan, Renhua; Brunner, Philip; Gao, Junfeng
刊名	JOURNAL OF CLEANER PRODUCTION
	2021
卷号	313
英文摘要	A new modelling framework, the Polder Hydrology and Nitrogen modelling System (PHNS), was developed to simulate the nitrogen dynamics and processes in polder systems. PHNS is a mass-balance model that simulates water and nitrogen dynamics in soil and surface water systems through integrating the WALRUS-paddy, MUSLE, and INCA models. The model explicitly considers the interactions among surface water, groundwater, and vadose water, as well as irrigation, pumping, and fertilizer application, which are the key processes controlling the nitrogen cycle in polders. The sensitivity analysis, calibration, and validation of the developed model were conducted in a Chinese agricultural polder by using three years of measured hydro-meteorological data. The calibrated and validated results proved that the model has a good performance with an R2 of 0.748 and a NashSutcliffe (NS) efficiency coefficient of 0.619 for total nitrogen (TN) concentration during the validation period. The nitrogen budget results (net export of 40.4 kg/ha/yr) revealed that the polder is a nitrogen source for downstream freshwater systems. Reducing the amount of fertilizers, retaining crop residues, and restoring aquatic plants in surface water are effective countermeasures for reducing nitrogen export from polders. This study provides an efficient modelling tool and useful insights into polder management.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20421]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Yan, Renhua,Brunner, Philip,Gao, Junfeng. Simulation of nitrogen dynamics in lowland polders using a new coupled modelling approach: Insights into management[J]. JOURNAL OF CLEANER PRODUCTION,2021,313.
APA	Yan, Renhua,Brunner, Philip,&Gao, Junfeng.(2021).Simulation of nitrogen dynamics in lowland polders using a new coupled modelling approach: Insights into management.JOURNAL OF CLEANER PRODUCTION,313.
MLA	Yan, Renhua,et al."Simulation of nitrogen dynamics in lowland polders using a new coupled modelling approach: Insights into management".JOURNAL OF CLEANER PRODUCTION 313(2021).