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Water and nutrient balances in a large tile-drained agricultural catchment: a distributed modeling study

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Fig. 1. Spatial delineation in THREW model. (a) A basin is divided into a number of representative elementary watersheds (REW)
Fig. 2. Conceptual illustration of coupled water, sediment and nutri- nutri-ent modeling in THREW
Fig. 3. Upper Sangamon River Basin (USRB) and the delineation of REWs.
Fig. 4. Comparison of the model predicted and observed runoff response at Monticello. The regime curves are normalized by the total upstream drainage area of Monticello.
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