Title :
Estimation of the Load of Total Nitrogen and Total Phosphorus in the Enclosed Bay Watershed using GIS
Author :
Ioka, Mikihiro ; Takahashi, Masaaki ; Chiba, Satoshi
Author_Institution :
Fac. of Environ. & Inf. Sci., Yokkaichi Univ., Yokkaichi
Abstract :
Nutrients run-off from land causes environmental problem due to the eutrophication of rivers, lakes or reservoirs. These run-off are considered to affect not only water quality but sea bottom soil status in enclosed bay which has little exchange of sea water to and from outer sea. This study describes estimation of the load of total nitrogen and total phosphorus in Ago bay and its watershed which is typical enclosed bay in Japan, using geographical information system. First, we describe the model of discharged load on mesh base. Then generation of land use map and digital elevation model are introduced. Finally, the load of COD, TN, TP of watershed are estimated by the mesh model and per unit production method. The result of the two methods is compared.
Keywords :
geographic information systems; hydrological techniques; nitrogen; oceanographic techniques; oceanography; phosphorus; sediments; water resources; Ago bay; GIS; Japan; N; P; enclosed bay watershed; geographical information system; lake eutrophication; nutrient run off; reservoir eutrophication; river eutrophication; sea bottom soil status; water quality; watershed total nitrogen load; watershed total phosphorus load; Digital elevation models; Environmental factors; Geographic Information Systems; Information systems; Lakes; Load modeling; Nitrogen; Reservoirs; Rivers; Soil; GIS; land-use; mesh model; nutrients;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2008. IGARSS 2008. IEEE International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2807-6
Electronic_ISBN :
978-1-4244-2808-3
DOI :
10.1109/IGARSS.2008.4779616
