Your search found 10 records
1 Mai, V. T.. 2007. Soil erosion and nitrogen leaching in northern Vietnam: Experimentation and modelling. Thesis. Wageningen, Netherlands: Wageningen University. 182p.
Erosion ; Measurement ; Runoff ; Sedimentation ; Soil degradation ; Land use ; Remote sensing ; GIS ; Watersheds ; Paddy fields ; Groundwater ; Nitrogen ; Leaching ; Models ; Calibration ; Rice ; Maize ; Fertilizers / Vietnam / Vinh Phuc Province / Tam Duong District / Red River Basin / Quan Dinh Watershed
(Location: IWMI HQ Call no: D 631.45 G784 VAN Record No: H039969)
(3.18 MB) (3.22 MB)
2 Mai, V. T.; Dinh Duong, N.; Van Keulen, H. 2007. Using LANDSAT images for studying land use dynamics and soil degradation: Case study in Tam Duong district, Vinh Phuc province, Vietnam. In Mai, V. T. Soil erosion and nitrogen leaching in northern Vietnam: Experimentation and modelling. Thesis. Wageningen, Netherlands: Wageningen University. pp.9-16.
(Location: IWMI HQ Call no: D 631.45 G784 VAN Record No: H039970)
(3.22 MB)
3 Mai, V. T.; Van Keulen, H.; Hessel, R.; Ritsema, C.; Roetter, R. P.; Thai, P. 2007. Soil erosion in Quan Dinh watershed, a hilly area in Tam Duong district, north Vietnam. In Mai, V. T. Soil erosion and nitrogen leaching in northern Vietnam: Experimentation and modelling. Thesis. Wageningen, Netherlands: Wageningen University. pp.17-33.
Erosion ; Measurement ; Watersheds ; Sedimentation ; Paddy fields ; Terraces ; Runoff ; Soils ; Land use / Vietnam / Tam Duong District / Red River Delta / Quan Dinh Watershed
(Location: IWMI HQ Call no: D 631.45 G784 VAN Record No: H039971)
(3.22 MB)
4 Mai, V. T.; Hessel, R.; Van Keulen, H.; Ritsema, C.; Roetter, R. P. 2007. Simulation of soil erosion in Quan Dinh watershed in Tam Duong district, north Vietnam. In Mai, V. T. Soil erosion and nitrogen leaching in northern Vietnam: Experimentation and modelling. Thesis. Wageningen, Netherlands: Wageningen University. pp.35-60.
Erosion ; Simulation models ; Watersheds ; Paddy fields ; Terraces ; Infiltration ; Runoff ; Sedimentation / Vietnam / Tam Duong District / Quan Dinh watershed
(Location: IWMI HQ Call no: D 631.45 G784 VAN Record No: H039972)
(3.22 MB)
5 Mai, V. T.; Van Keulen, H.; Roetter, R. P.; Bui, H. H.; Nguyen, V. B. 2007. Nitrogen leaching in intensive cropping systems in Tam Duong district, Red River Delta of Vietnam. In Mai, V. T. Soil erosion and nitrogen leaching in northern Vietnam: Experimentation and modelling. Thesis. Wageningen, Netherlands: Wageningen University. pp.61-80.
Nitrogen ; Leaching ; Models ; Water balance ; Horticulture ; Vegetables ; Rice ; Flowers / Vietnam / Red River Delta / Tam Duong District
(Location: IWMI HQ Call no: D 631.45 G784 VAN Record No: H039973)
(3.22 MB)
6 Mai, V. T.; Van Keulen, H.; Roetter, R. P. 2007. Nitrogen leaching and nitrogen losses in rice-rice maize systems on sandy loam soil in Tam Duong, Red River Delta, Vietnam. In Mai, V. T. Soil erosion and nitrogen leaching in northern Vietnam: Experimentation and modelling. Thesis. Wageningen, Netherlands: Wageningen University. pp.81-100.
Nitrogen ; Leaching ; Models ; Rice ; Cropping systems / Vietnam / Red River Delta / Tam Duong District
(Location: IWMI HQ Call no: D 631.45 G784 VAN Record No: H039974)
(3.22 MB)
7 Mai, V. T.; Van Keulen, H.; Leopold, U.; Roetter, R. P. 2007. Spatio-temporal prediction of nitrogen concentrations in shallow groundwater under intensive farming in northern Vietnam using regression-kriging. In Mai, V. T. Soil erosion and nitrogen leaching in northern Vietnam: Experimentation and modelling. Thesis. Wageningen, Netherlands: Wageningen University. pp.101-117.
Groundwater ; Nitrogen ; Water pollution ; Land use ; Regression analysis / Vietnam / Red River Delta / Tam Duong District
(Location: IWMI HQ Call no: D 631.45 G784 VAN Record No: H039975)
(3.22 MB)
8 Mai, V. T.; Van Keulen, H.; Hoanh, Chu Thai; Hessel, R.; Roetter, R. P. 2007. Spatial dynamics of nitrogen in shallow groundwater under intensive farming in northern Vietnam. In Mai, V. T. Soil erosion and nitrogen leaching in northern Vietnam: experimentation and modelling. Thesis. Wageningen, Netherlands: Wageningen University. pp.119-135.
Groundwater ; Nitrogen fertilizers ; Leaching ; Simulation models ; Calibration ; Water pollution ; Vegetables ; Percolation ; GIS / Vietnam / Tam Duong District
(Location: IWMI HQ Call no: D 631.45 G784 VAN Record No: H039976)
(3.22 MB)
9 Mai, V. T.; Van Keulen, H.; Hoanh, Chu Thai; Hessel, 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 (GIS-IDEAS), Hanoi, Vietnam, 4-6 December 2008. Wageningen, Netherlands: Wageningen UR Publication. pp.383-388.
Simulation models ; Calibration ; Nitrogen fertilizers ; Leaching ; Irrigated farming ; Groundwater ; Percolation ; Intensive farming ; Spatial distribution ; Vegetables ; Cabbages / Vietnam / Tam Duong District
(Location: IWMI HQ Call no: e-copy only Record No: H041856)
http://wgrass.media.osaka-cu.ac.jp/gisideas08/viewpaper.php?id=288
https://vlibrary.iwmi.org/pdf/H041856.pdf
https://vlibrary.iwmi.org/pdf/H041856.pdf
(0.21 MB)
10 Mai, V. T.; Hoanh, Chu Thai; Van Keulen, H.; Hessel, R. 2013. Spatial modelling for nitrogen leaching from intensive farming in Red River Delta of Vietnam. Asian Journal of Water, Environment and Pollution, 10(3):51-61.
Intensive farming ; Nitrogen ; Leaching ; Rivers ; Deltas ; Irrigation ; Land use ; Soil water content ; Vegetables ; Crop production ; Fertilizers ; Weather ; Models ; Calibration / Vietnam / Tam Duong District / Red River Delta
(Location: IWMI HQ Call no: e-copy only Record No: H046039)
(1.12 MB)
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 ground water. 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.
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