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Agricultural hydrology is the study of water balance components intervening in agricultural water management, especially in irrigation and drainage.〔N.A. de Ridder and J. Boonstra, 1994. ''Analysis of Water Balances''. In: H.P.Ritzema (ed.), Drainage Principles and Applications, Publication 16, p.601-634. International Institute for Land Reclamation and Improvement (ILRI), Wageningen, The Netherlands. ISBN 90-70754-33-9〕 ==Water balance components== The water balance components can be grouped into components corresponding to zones in a vertical cross-section in the soil forming reservoirs with inflow, outflow and storage of water:〔''Drainage for Agriculture: Hydrology and Water Balances''. Lecture notes, International Course on Land Drainage (ICLD), International Institute for Land Reclamation and Improvement (ILRI), Wageningen, The Netherlands. On the web : ()〕 # the surface reservoir (''S'') # the root zone or unsaturated (vadose zone) (''R'') with mainly vertical flows # the aquifer (''Q'') with mainly horizontal flows # a transition zone (''T'') in which vertical and horizontal flows are converted The general water balance reads: * inflow = outflow + change of storage and it is applicable to each of the reservoirs or a combination thereof. In the following balances it is assumed that the water table is inside the transition zone. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hydrology (agriculture)」の詳細全文を読む スポンサード リンク
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