A DISTRIBUTED RIVER RUNOFF MODEL FOR SETO INLAND SEA BASIN AND TREND IN TOTAL NITROGEN LOADING FOR THE DECADE 2006–2015

A DISTRIBUTED RIVER RUNOFF MODEL FOR SETO INLAND SEA BASIN AND TREND IN TOTAL NITROGEN LOADING FOR THE DECADE 2006–2015

Accurate prediction of climate change impacts on nutrient loading from watershed is important to discuss adaptive strategies in coastal management. The present study developed a distributed river runoff model for Seto Inland Sea basin to evaluate water and nutrient discharge. Using this model and di...

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Veröffentlicht in:Doboku Gakkai Ronbunshu. B1, Suikogaku = Journal of Japan Society of Civil Engineers. Ser. B1, Hydraulic Engineering Ser. B1 (Hydraulic Engineering), 2019, Vol.75(2), pp.I_421-I_426
Hauptverfasser: HIGASHI, Hironori, AKIYAMA, Chiaki, NAKADA, Satoshi, YOSHINARI, Hiroshi
Format: Artikel
Sprache:eng ; jpn
Schlagworte:
Climate change
Climate prediction
Coastal management
Coastal zone management
distributed runoff model
Environmental impact
Freshwater
Hydrologic models
Inland seas
Inland water environment
Mineral nutrients
Nitrogen
Nutrient loading
Nutrients
River basins
River discharge
River flow
river water quality
Rivers
Runoff
Seto Inland Sea basin
Simulation
total nitrogen loading
Trends
Water discharge
Watersheds
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Zusammenfassung:Accurate prediction of climate change impacts on nutrient loading from watershed is important to discuss adaptive strategies in coastal management. The present study developed a distributed river runoff model for Seto Inland Sea basin to evaluate water and nutrient discharge. Using this model and disclosed observations, we investigated the trends in total nitrogen (TN) concentration and loading in 21 major rivers for the decade 2006–2015. The observed TN concentration had a significant decreasing trend in almost all rivers, which was consistent with the simulation. By contrast, increase trends were found in TN loading and freshwater discharge from all river basins in the simulation. The results suggest that the significant trends in TN concentration and loading are caused by precipitation increase for the period.
ISSN:2185-467X
2185-467X
DOI:10.2208/jscejhe.75.2_I_421