scholarly journals A science strategy to support management decisions related to hypoxia in the northern Gulf of Mexico and excess nutrients in the Mississippi River Basin

Circular ◽  
2004 ◽  
Author(s):  
Keyword(s):  
Gulf Of Mexico ◽  
River Basin ◽  
Mississippi River ◽  
Mississippi River Basin ◽  
Management Decisions ◽  
Northern Gulf Of Mexico

scholarly journals Integrating Multi-Media Models to Assess Nitrogen Losses from the Mississippi River Basin to the Gulf of Mexico

2018 ◽  
Author(s):  
Yongping Yuan ◽  
Ruoyu Wang ◽  
Ellen Cooter ◽  
Limei Ran ◽  
Prasad Daggupati ◽  
...  
Keyword(s):  
Water Quality ◽  
Air Quality ◽  
Gulf Of Mexico ◽  
River Basin ◽  
Mississippi River ◽  
River Basins ◽  
Large River ◽  
System Level ◽  
Mississippi River Basin ◽  
Large River Basins

Abstract. This study describes and implements an integrated, multimedia, process-based system-level approach to estimating nitrogen (N) fate and transport in large river basins. The modeling system includes the following components: 1) Community Multi-Scale Air Quality (CMAQ); 2) Water Research and Forecasting (WRF); 3) Environmental Policy Integrated Climate (EPIC); and 4) Soil and Water Assessment Tool (SWAT). The previously developed Fertilizer Emission Scenario Tool for the Community Multiscale Air Quality (FEST-C) system integrated EPIC with the WRF model and CMAQ. FEST-C, driven by process-based WRF weather simulations, includes atmospheric N additions to agricultural cropland, and agricultural cropland contributions to ammonia emissions. Watershed hydrology and water quality models need to be integrated with the system (FEST-C), however, so it can be used in large river basins to address impacts of fertilization, meteorology, and atmospheric N deposition on water quality. Objectives of this paper are to describe how to expand the previous effort by integrating a watershed model with the FEST-C (CMAQ/WRF/EPIC) modeling system, as well as demonstrate application of the Integrated Modeling System (IMS) to the Mississippi River Basin (MRB) to simulate streamflow and dissolved N loadings to the Gulf of Mexico (GOM). IMS simulation results generally agree with USGS observations/estimations; the annual simulated streamflow is 218.9 mm and USGS observation is 211.1 mm and the annual simulated dissolved N is 2.1 kg/ha. and the USGS estimation is 2.8 kg/ha. Integrating SWAT with the CMAQ/WRF/EPIC modeling system allows for its use within large river basins without losing EPIC’s more detailed biogeochemistry processes, which will strengthen assessment of impacts of future climate scenarios, regulatory and voluntary programs for nitrogen oxide air emissions, and land use and land management on N transport and transformation in large river basins.

scholarly journals Long‐Term Trajectory of Nitrogen Loading and Delivery From Mississippi River Basin to the Gulf of Mexico

2020 ◽  
Vol 34 (5) ◽  
Author(s):  
Hanqin Tian ◽  
Rongting Xu ◽  
Shufen Pan ◽  
Yuanzhi Yao ◽  
Zihao Bian ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
River Basin ◽  
Mississippi River ◽  
Nitrogen Loading ◽  
Mississippi River Basin
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