摘要：The terraced field widely distributed in Loess Plateau where serious soil and water loss happens, hasa significant influence on watershed hydrological environment. At present, for the deficiency ofwatershed scale terraced fields hydrological environment impact assessment model and lacking ofmeasured data, the terraced fields environmental impact assessment has attracted many attentions ofthe researchers. This paper adopts the hydrologic analogy combined with a scale physical modelmethod, to infer the runoff and sediments in data-scarce area. Using the embedded terraced moduleSWAT model to assessment of terraced fields environmental impact, the results show that was a newway to conjecture the hydrologic data in data-scarce area. And the terraced field module can meet theaccuracy requirement, the NS sufficient were both above 0.5 in calibration and verifying period. Thesoil erosion modulus of terraced fields contained in and removed from the watershed, was respectively5.3% and 16.2% greater than the real. This indicates that the embedded terraced module SWAT modelcould be used in terraced fields environmental impact assessment in Loess Plateau small watershed.
