Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 433177
Title Influence of paddy rice terraces on soil erosion of a small watershed in a hilly area of Northern Vietnam
Author(s) Mai, V.T.; Keulen, H. van; Hessel, R.; Ritsema, C.J.; Roetter, R.P.; Phien, T.
Source Paddy and Water Environment 11 (2013)1-4. - ISSN 1611-2490 - p. 285 - 298.
DOI https://doi.org/10.1007/s10333-012-0318-2
Department(s) Plant Production Systems
PPO/PRI AGRO Duurzame Bedrijfssystemen
Alterra - Soil physics and land use
SS - Soil Physics and Land Use
Soil Physics and Land Management
Soil Science Centre
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) suspended-sediment concentrations - loess plateau - agricultural catchments - runoff - model - conservation - impacts - vegetation - fertility - rainfall
Abstract Soil erosion is the main cause of soil degradation in northern Vietnam. In this study, soil erosion was measured in 2 m2 field plots, a 19.1-ha sub-watershed, and a 248.9-ha main watershed in Tam Quan commune, Tam Duong district, northern Vietnam during 2 years, i.e., 2004–2005. The main watershed includes lowland paddy fields, and is representative for watersheds in the northern Vietnamese landscape. Soil erosion was measured for eight events, at all the three scales to increase our understanding of erosional processes and to assess the effects of paddy fields within the main watershed. The results show that total discharge and sediment yield in both sub-watershed and main watershed were much lower than those in the field plots. Total discharge per unit area in the main watershed was higher than in the sub-watershed, because during the growing season, the paddies are filled with water and any rainfall on them therefore becomes runoff. Sediment yield in the main watershed fluctuated, depending on the soil erosion contribution from many sub-watersheds. Annual rainfalls in 2004 and 2005 were 1,172 and 1,560 mm, respectively, resulting in corresponding total discharges of 54 and 332 mm and total soil losses of 163 and 1,722 kg ha-1 year-1. High runoff volumes occurred in July, August, and September, but April, June, the last 10 days of September and October, were the susceptible periods for soil erosion in the study area because of low plant cover and many agricultural activities during these periods.
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