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- W2108304080 abstract "According to data collected from a field experiment of controlled drainage in Yinnan Irrigation District, this paper analyses the amount of drainage water and variation of salt and water balance. Compared with traditional drainage, it is found that the volume of drainage water is obviously reduced by controlled drainage. The groundwater table in the controlled drainage areas is 1.8 cm higher than that in the traditional drainage areas. If drainage velocity is used to substitute for the volume of drainage water, the total volume of drainage water drained from controlled drainage areas is on average 50% less than that from traditional drainage areas. At the same time, the volume of underground drainage water decreases by 46%. By analysing the balance between salt and water in the controlled drainage areas, the introduced amount of salt is less than the discharged amount of salt, so salt and water are still kept in good status. Copyright © 2008 John Wiley & Sons, Ltd.A partir des donnees de l'experience au champ du drainage controle dans la zone d'irrigation de Yinnan, cet article analyse la quantite d'eau de drainage et la variation de l'equilibre du sel et de l'eau. Compare au drainage traditionnel, on constate que le drainage controle permet clairement de reduire le volume de l'eau de drainage. Le niveau de la nappe dans les secteurs de drainage controle est 1.8 cm plus haut que dans les secteurs traditionnels. Si on substitue la vitesse de drainage au volume, le volume total des eaux de drainage est inferieur en moyenne de 50% dans les secteurs de drainage controle. En meme temps, le volume de l'eau souterraine drainee diminue de 46%. En analysant l'equilibre entre le sel et l'eau dans les secteurs controles, la quantite de sel introduite est inferieure a la quantite lessivee, ainsi le sel et l'eau sont maintenus a un bon niveau. Copyright © 2008 John Wiley & Sons, Ltd." @default.
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- W2108304080 date "2009-07-01" @default.
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- W2108304080 title "Salt and water balance analysis after adopting controlled drainage in Yinnan Irrigation District, Ningxia, China" @default.
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- W2108304080 doi "https://doi.org/10.1002/ird.407" @default.
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