Spatial simulation of nitrogen leaching from intensive agriculture in Northern Vietnam

M.V. Trinh, H. van Keulen, C.T. Hoanh, R. Hesselink

Research output: Chapter in Book/Report/Conference proceedingAbstract

Abstract

In this study, a spatial dynamic model was developed, to simulate nitrogen dynamics in Van Hoi commune, Tam Duong district, Vietnam, for different soil and land use types, under different irrigation and fertilizer regimes. The model has been calibrated using measured nitrogen concentrations in soil solution in March and August 2004 and validated for data from March and August 2005. Lateral flow was low in this level area. Percolation was the main process leading to high nitrogen leaching losses to groundwater. Calculated annual leaching losses varied from 88 to 122 kg N ha¿1 in flowers, 64 to 82 in vegetables of the cabbage group, 51 to 76 in chili, 56 to 75 in vegetables of the squash group, and 36 to 55 in rice. Model needs to be improved through further calibration in both vertical and lateral dimensions and more combinations of soil and land use.
Original languageEnglish
Title of host publicationProceedings of International Symposium on GeoInformatics for Spatial-infrastructure Development in Earth and Allied Sciences, Hanoi, Vietnam, 4 - 6 December, 2008
Place of PublicationHanoi
Pages383-388
Publication statusPublished - 2008
EventInternational Symposium on GeoInformatics for Spatial-infrastructure Development in Earth and Allied Sciences 2008 -
Duration: 4 Dec 20086 Dec 2008

Conference

ConferenceInternational Symposium on GeoInformatics for Spatial-infrastructure Development in Earth and Allied Sciences 2008
Period4/12/086/12/08

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Trinh, M. V., van Keulen, H., Hoanh, C. T., & Hesselink, R. (2008). Spatial simulation of nitrogen leaching from intensive agriculture in Northern Vietnam. In Proceedings of International Symposium on GeoInformatics for Spatial-infrastructure Development in Earth and Allied Sciences, Hanoi, Vietnam, 4 - 6 December, 2008 (pp. 383-388). Hanoi.